WORLDBASE

WORLDBASE Players IM Wiersma, E

Stockfish
GameID: 0
FIDE Country B-Year Gender Standard Rapid Blitz
1002864 NED 1973 M 2274 2296 2282
193 games
2024.10.26 39th ECC Open 2024
315304 IM Wiersma, E (2292) IM Klabis, R (2399) 0-1
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5 O-O 8.O-O d6 9.f4 Bb6 10.Qd2 Nxd4 11.cxd4 d5 12.e5 Qg6 13.Nc3 c6 14.Be2 Bh3 15.Bf3 f6 16.Ne2 Nf5 17.Bf2 fxe5 18.dxe5 Nh4 19.Bxb6 Nxf3+ 20.Rxf3 Qxg2# 0-1
2024.10.25 39th ECC Open 2024
315088 Gnichtel, G (2135) IM Wiersma, E (2292) 1/2-1/2
1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 Bg7 5.e4 O-O 6.Nf3 e6 7.Be2 exd5 8.cxd5 d6 9.Nd2 Re8 10.O-O Nbd7 11.Qc2 Ne5 12.h3 g5 13.Nc4 Nxc4 14.Bxc4 g4 15.h4 a6 16.a4 Nd7 17.Bg5 f6 18.Bf4 Ne5 19.Bxe5 Rxe5 20.g3 f5 21.exf5 Bxf5 22.Qd2 Qf6 23.Rae1 Rae8 24.Re2 Rxe2 25.Bxe2 Qg6 26.Bc4 Bh6 27.Qd1 Bc2 28.Qa1 Bd2 29.Nb1 Bh6 30.Nc3 Bd2 31.Nb1 Bh6 32.Nc3 Bd2 1/2-1/2
2024.10.24 39th ECC Open 2024
314838 IM Wiersma, E (2292) Bjarnason, O (2115) 1-0
1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Nd7 6.Nc3 Nxc3 7.bxc3 Nxe5 8.dxe5 Bc5 9.O-O Be6 10.Kh1 Qd7 11.f4 g6 12.f5 gxf5 13.Bg5 Be7 14.Bxe7 Qxe7 15.Bxf5 O-O-O 16.Qd4 c5 17.Bxe6+ fxe6 18.Qa4 Kb8 19.Rf6 d4 20.Raf1 dxc3 21.Qc4 Rhf8 22.Qxc3 Rxf6 23.exf6 Qc7 24.Qc4 Qd6 25.Qh4 a6 26.f7 Rf8 27.Qxh7 e5 28.h3 Ka7 29.Qf5 Qe7 30.Qf6 Qc7 31.Qe6 e4 32.Qe8 Qd6 33.Qxe4 1-0
2024.10.23 39th ECC Open 2024
314634 Heier, Odin Nikolai (1966) IM Wiersma, E (2292) 1/2-1/2
1.d4 Nf6 2.Bf4 c5 3.d5 b5 4.c4 b4 5.Nf3 g6 6.a3 Bg7 7.axb4 cxb4 8.g3 d6 9.Be3 a5 10.Bg2 O-O 11.O-O Bd7 12.c5 Ng4 13.Bd4 dxc5 14.Bxc5 Bxb2 15.Ra2 Na6 16.Bxb4 axb4 17.Rxb2 Qa5 18.Qd4 Rab8 19.Nbd2 Rfd8 20.Nc4 Qc7 21.h3 Nf6 22.e4 Bb5 23.Rc1 Qc5 24.Rbb1 Rdc8 25.Qxc5 Rxc5 26.Nce5 Rxc1+ 27.Rxc1 Nxe4 28.Nd4 Nc3 29.Nec6 Bxc6 30.dxc6 e5 31.Ra1 Nc7 32.Nb3 Kf8 33.Ra7 N7b5 34.Rb7 Rc8 1/2-1/2
2024.10.22 39th ECC Open 2024
314335 IM Wiersma, E (2292) CM Idrizaj, A (2237) 1/2-1/2
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 a6 6.c4 g6 7.Nc3 Bg7 8.Be3 O-O 9.Qd2 Nc6 10.Nc2 Be6 11.Be2 Rc8 12.Nd5 Nd7 13.Na3 Re8 14.O-O Qa5 15.Rfd1 f5 16.exf5 Bxf5 17.Rac1 Be6 18.Rc2 Qxd2 19.Rcxd2 Bxd5 20.cxd5 Nb4 21.Bc4 Rc7 22.Bb3 Rec8 23.Re2 Ne5 24.Bd2 Nbd3 25.Bc3 Kh8 26.Nc2 Nc5 27.Nd4 Bf6 28.Bc2 b5 29.Ba5 Rb7 30.b3 Ned3 31.Nc6 Nf4 32.Red2 Rd7 33.Be4 Kg7 34.Kf2 1/2-1/2
2024.10.21 39th ECC Open 2024
322421 GM Can, E (2551) IM Wiersma, E (2292) 1-0
1.e4 c5 2.Nf3 e6 3.c3 d5 4.exd5 Qxd5 5.d4 Nf6 6.Na3 Nc6 7.Be2 Qd8 8.Nc2 Be7 9.Bf4 Qb6 10.Rb1 O-O 11.O-O Rd8 12.Qe1 cxd4 13.Ncxd4 Nxd4 14.Nxd4 Nd5 15.Bg3 Bf6 16.Nf3 Bd7 17.Bd3 g6 18.Qe2 Be8 19.h4 Ne7 20.Be5 Bxe5 21.Nxe5 h5 22.Rfe1 Rac8 23.Qf3 Kg7 24.Bc2 Qc7 25.Qe3 Qc5 26.Qe2 Qc7 27.Rbc1 Nc6 28.Nf3 Qf4 29.g3 Qd6 30.Ng5 Qd2 31.Qf1 Qd6 32.Bb3 e5 33.Re3 Na5 34.Rd1 Qc5 35.Be6 Rxd1 36.Qxd1 Nc4 37.Rf3 Rc7 38.Bxf7 1-0
2024.10.20 39th ECC Open 2024
313952 IM Wiersma, E (2292) Den Roover, Nikolay Jorgensen (1876) 1-0
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5 b6 8.O-O Bb7 9.Nd2 Bxd4 10.cxd4 Nxd4 11.Bd3 Nec6 12.f4 O-O-O 13.Qa4 Ne6 14.e5 Qe7 15.Rac1 g5 16.fxg5 Nxe5 17.Ba6 Nxg5 18.Bxb7+ Kxb7 19.Rxc7+ Kxc7 20.Qxa7+ Kd6 21.Qxb6+ Kd5 22.Qb3+ Kd6 23.Bc5+ Kxc5 24.Qa3+ Kd5 25.Qxe7 h6 26.Rd1 1-0
2024.09.21 Dutch League 2024-25
366120 IM Wiersma, E (2293) FM Lammens, Tim (2238) 1/2-1/2
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Be3 e6 5.Nd2 Nd7 6.Ngf3 Rc8 7.Be2 Bg6 8.O-O Nh6 9.Bxh6 gxh6 10.Nb3 Be7 11.Qd2 h5 12.Ne1 c5 13.c3 O-O 14.Nxc5 Nxc5 15.dxc5 Bxc5 16.Qh6 Qb6 17.Nd3 Be7 18.Rad1 h4 19.Nf4 Qc7 20.Nd3 Qb6 21.Nf4 Qc7 22.Nd3 Qb6 1/2-1/2
2023.12.16 Dutch League 2023-24
661613 IM Wiersma, E (2298) FM Schoorl, R (2351) 1/2-1/2
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Qf6 6.d4 exd4 7.Bg5 Qd6 8.Nxd4 Be7 9.Bxe7 Nxe7 10.Nc3 Bd7 11.Nb3 O-O-O 12.Qf3 Qg6 13.Qe3 Kb8 14.Nc5 Bc8 15.Rad1 b6 16.Nd3 Rhe8 17.Nf4 Qh6 18.Rxd8 Rxd8 19.Rd1 Re8 20.Qg3 1/2-1/2
2022.11.26 Dutch League 2022-23
1047439 Perkampus, Laurin (2123) IM Wiersma, E (2301) 1/2-1/2
1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Nc3 Nc6 5.Nf3 Nf6 6.Bf4 Ne4 7.e3 Nxc3 8.bxc3 e6 9.Bd3 Bd6 10.Bxd6 Qxd6 11.O-O O-O 12.c4 dxc4 13.Bxc4 b6 14.Qe2 Bb7 15.Rfd1 Na5 16.Ba6 Qd5 17.Bxb7 Qxb7 18.Rac1 Rac8 19.Qd2 Nc4 20.Qb4 a5 21.Qb5 Nd6 22.Qb2 Nc4 23.Qb5 Nd6 24.Qb2 Nc4 1/2-1/2
2022.10.09 37th ECC Open 2022
1163106 IM Wiersma, E (2299) IM Givon, A (2434) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Qc7 7.a3 b6 8.Be3 Bb7 9.f3 Be7 10.Rc1 O-O 11.Be2 d6 12.O-O Nbd7 13.b4 Rfc8 14.Qd2 Rab8 15.Rfd1 Qd8 16.Nb3 Qe8 17.Kh1 Ba8 18.Bf1 Ne5 19.Qd4 Nc6 20.Qd2 Ne5 21.Qd4 h5 22.h3 Nc6 23.Qd2 Ne5 24.Qd4 h4 25.f4 Ng6 26.Be2 e5 27.fxe5 dxe5 28.Qd3 a5 29.Nd5 axb4 30.axb4 Bxd5 31.cxd5 Bxb4 32.Nd2 b5 33.Nf3 Bd6 34.Rc6 Rxc6 35.dxc6 Bc7 36.Ng5 Nf8 37.Rc1 Ne6 38.Nxe6 Qxe6 39.Bg5 b4 1/2-1/2
2022.10.07 37th ECC Open 2022
1162962 IM Fedorovsky, M (2410) IM Wiersma, E (2299) 1/2-1/2
1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Bf4 Qb6 5.Nc3 Nf6 6.e3 Qxb2 7.Rc1 Bf5 8.Bb5+ Nc6 9.Nge2 e6 10.O-O Be7 11.Bd3 Bxd3 12.Qxd3 O-O 13.Rb1 Qa3 14.Rxb7 Na5 15.Rbb1 Rfc8 16.Rfd1 a6 17.Rb6 Nc4 18.Rb3 Qa5 19.h3 Bd6 20.Bxd6 Nxd6 21.Rdb1 g6 22.f3 Ra7 23.e4 Nc4 24.e5 Nd7 25.f4 Rac7 26.Kh2 f6 27.Rb4 Rc6 28.Rb7 R6c7 29.R7b4 Rc6 30.Rb7 R6c7 31.R7b4 1/2-1/2
2022.10.04 37th ECC Open 2022
1162716 GM Anton Guijarro, D (2655) IM Wiersma, E (2299) 1-0
1.c4 c6 2.Nf3 d5 3.e3 Nf6 4.Nc3 e6 5.b3 Nbd7 6.Qc2 Bd6 7.Bb2 O-O 8.Be2 Qe7 9.O-O e5 10.cxd5 Nxd5 11.Ne4 Bc7 12.Ng3 Re8 13.a3 Nf8 14.b4 a6 15.Rac1 Ng6 16.Qb1 Bg4 17.h3 Bd7 18.Bc4 Bb8 19.Bb3 e4 20.Nd4 Nh4 21.Bc2 f5 22.Bb3 Kh8 23.Bxd5 cxd5 24.Rc5 Be6 25.Qd1 Bd6 26.Nxe6 Qxe6 27.Qh5 Bxc5 28.bxc5 Qe7 29.Nxf5 Nxf5 30.Qxf5 Rad8 31.Bd4 Qd7 32.Qh5 Rf8 33.Rb1 Rc8 34.Qg4 Rf7 35.Qxd7 Rxd7 36.f4 exf3 37.gxf3 Rc6 38.f4 Kg8 39.Kg2 Rf7 40.d3 Rg6+ 41.Kf3 Rh6 42.Rh1 g5 43.Be5 gxf4 44.exf4 Kf8 45.h4 Rh5 46.Kg4 Rhf5 47.h5 Ke8 48.Rb1 Kd8 49.Rb6 Kc8 50.Rd6 Rf8 51.Rxd5 R8f7 52.Rd6 Rf8 53.d4 R8f7 54.Rh6 Kd7 55.d5 Kc8 56.Rb6 Rf8 57.c6 bxc6 58.dxc6 Rxe5 59.fxe5 Kc7 60.Rxa6 h6 61.e6 Rf6 62.e7 Re6 63.Kf5 1-0
2022.06.19 HSG Open 2022
1297100 Berrevoets, Jeroen (2030) IM Wiersma, E (2300) 0-1
1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bxf3 5.Qxf3 e6 6.d3 Nd7 7.Bd2 Qb6 8.a4 Bb4 9.exd5 cxd5 10.Qg3 Ngf6 11.Qxg7 Rg8 12.Qh6 Rg6 13.Qf4 d4 14.a5 Qc5 15.Ne4 Nxe4 16.Qxe4 Bxd2+ 17.Kxd2 Rc8 18.Rc1 Qb4+ 19.Kd1 Qxb2 20.Be2 Nc5 21.Qe5 Ke7 22.Qf4 Na4 23.Qh4+ Rf6 24.Bf3 Nc3+ 25.Kd2 Nb1+ 26.Kd1 Qc3 27.Rxb1 Qxc2+ 28.Ke1 Qxb1+ 29.Bd1 Qxd3 0-1
2022.06.19 HSG Open 2022
1297108 IM Pijpers, A (2455) IM Wiersma, E (2300) 1-0
1.e4 c6 2.d4 d5 3.e5 c5 4.Nf3 cxd4 5.Qxd4 Nc6 6.Qf4 e6 7.Bd3 Nb4 8.Bd2 Nxd3+ 9.cxd3 f5 10.Nc3 Bd7 11.Ne2 Qb6 12.O-O Ne7 13.Qg3 Rc8 14.Bc3 h6 15.Nf4 Kf7 16.Nh5 g6 17.Nf6 Bb5 18.Nd4 Bg7 19.a4 Ba6 20.Rac1 g5 21.Rfe1 Rhd8 22.Qh3 Rc6 23.a5 Qc7 24.Nxc6 bxc6 25.Bb4 Ng6 26.Bd6 Rxd6 27.exd6 Qxd6 28.Nh5 Bd4 29.Ng3 Kg7 30.Qxf5 Nf4 31.Qg4 Bxf2+ 32.Kxf2 1-0
2022.06.18 HSG Open 2022
1297086 IM Wiersma, E (2300) FM Konings, F (2131) 1/2-1/2
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Na6 7.Re1 c5 8.d5 Nc7 9.a4 Bg4 10.h3 Bxf3 11.Bxf3 Nd7 12.g3 a6 13.Bg2 1/2-1/2
2022.06.17 HSG Open 2022
1297053 Van Pel, Gerben (2012) IM Wiersma, E (2300) 0-1
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Qc2 Nbd7 6.g4 dxc4 7.g5 Nd5 8.e4 Nxc3 9.bxc3 b5 10.h4 Bb7 11.Be3 c5 12.Rd1 cxd4 13.Nxd4 Qa5 14.Bg2 Nc5 15.O-O a6 16.f4 O-O-O 17.e5 Qc7 18.Rb1 Be7 19.a4 Nxa4 20.Nxb5 axb5 21.Rxb5 Bxg2 22.Qxa4 Bb7 23.Qa2 Rd5 24.Rb2 Rhd8 25.Bd4 Ra5 26.Qb1 Qc6 27.Kh2 Rb5 28.Rxb5 Qg2# 0-1
2022.06.17 HSG Open 2022
1297064 IM Wiersma, E (2300) Bosboom, Ardin (2083) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.Bd3 Be6 12.c3 Bg7 13.Nxb5 axb5 14.Bxb5 Bd7 15.exf5 O-O 16.O-O e4 17.a4 Ne5 18.f6 Bg4 19.f3 exf3 20.gxf3 Bh3 21.f4 Bxf6 22.fxe5 Bxe5 23.Rf2 Qg5+ 24.Kh1 Qh4 25.Qf3 Kh8 26.Nf6 Rab8 27.Nd7 Rxb5 28.Nxf8 Rb8 29.Qxf7 Bg7 30.Re1 Bf5 31.Qxf5 Rxf8 32.Qxf8+ Bxf8 33.Rxf8+ Kg7 34.Rfe8 Qf2 35.R8e2 Qc5 36.Ra1 h5 37.a5 h4 38.a6 Qd5+ 39.Kg1 Qc5+ 40.Rf2 h3 41.a7 Qg5+ 42.Kf1 Qb5+ 43.Ke1 Qe5+ 44.Re2 1-0
2022.03.20 TCh-BEL 2021-22
1403436 Terryn, Ezra (2121) IM Wiersma, E (2300) 0-1
1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4 h5 5.Bg5 Qb6 6.Bd3 Bxd3 7.Qxd3 Qa6 8.Qxa6 Nxa6 9.Ne2 e6 10.Nd2 Nb4 11.Kd1 c5 12.a3 Nc6 13.c3 Nge7 14.Bxe7 Bxe7 15.b4 cxd4 16.cxd4 a5 17.b5 Na7 18.a4 Nc8 19.Kc2 Nb6 20.Kb3 Rc8 21.Rac1 Kd7 22.g3 Bb4 23.Nf3 Rc4 24.Ra1 Be7 25.Rhc1 Rb4+ 26.Kc2 Nxa4 27.Nd2 Rc8+ 28.Kd3 Nb2+ 29.Ke3 Rxc1 30.Rxc1 Rxb5 0-1
2020.01.19 TCh-BEL 2019-20
2023319 Noiroux, K (2165) IM Wiersma, E (2324) 1/2-1/2
1.d4 Nf6 2.Nf3 g6 3.Bg5 Bg7 4.Nbd2 O-O 5.e4 d5 6.Bd3 dxe4 7.Nxe4 Nxe4 8.Bxe4 c5 9.c3 cxd4 10.Nxd4 h6 11.Be3 e5 12.Nb5 Qh4 13.Bd5 Nc6 14.O-O Rd8 15.Nc7 Rb8 16.Qb3 Qe7 17.Bxc6 Qxc7 18.Bd5 b6 19.Rfd1 Bb7 20.c4 1/2-1/2
2019.10.26 23rd Hoogeveen Open 2019
2061647 CM Dev, Shah (2025) IM Wiersma, E (2321) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 b6 6.a3 Ba5 7.Bd2 O-O 8.Ng3 Bb7 9.Rb1 Bxc3 10.Bxc3 d5 11.cxd5 Nxd5 12.Bd3 Nc6 13.dxc5 bxc5 14.O-O Nxc3 15.bxc3 Rb8 16.Ne4 Qe7 17.Nd6 1/2-1/2
2019.10.25 23rd Hoogeveen Open 2019
2061615 IM Wiersma, E (2321) Pekin, T (2083) 1-0
1.e4 c5 2.Nf3 Nc6 3.Bb5 d6 4.O-O Bd7 5.Re1 Nf6 6.c3 a6 7.Bf1 Bg4 8.d4 cxd4 9.cxd4 e5 10.Be3 exd4 11.Bxd4 Be7 12.Nc3 O-O 13.Be3 Re8 14.h3 Bh5 15.g4 Bg6 16.Nh4 Bf8 17.Nxg6 hxg6 18.Bg2 Qa5 19.g5 Nd7 20.Nd5 Rac8 21.h4 Ne7 22.b4 Qd8 23.Nxe7+ Bxe7 24.Qd5 b5 25.Qb7 Nb8 26.a4 Qc7 27.Qxc7 Rxc7 28.axb5 axb5 29.Ra5 Nd7 30.Rxb5 Ne5 31.Rc1 Rxc1+ 32.Bxc1 Rc8 33.Be3 f5 34.exf5 gxf5 35.Bd5+ Kh8 36.Rb7 Bd8 37.b5 1-0
2019.10.24 23rd Hoogeveen Open 2019
2061579 Hoffman, Ro (1991) IM Wiersma, E (2321) 1/2-1/2
1.Nf3 Nf6 2.c4 c5 3.Nc3 Nc6 4.e3 e5 5.d3 d5 6.cxd5 Nxd5 7.Be2 Nc7 8.O-O Be7 9.b3 O-O 10.Bb2 Be6 11.Rc1 b6 12.Ne4 f6 13.d4 f5 14.Ng3 exd4 1/2-1/2
2019.10.23 23rd Hoogeveen Open 2019
2061545 IM Wiersma, E (2321) Takawira, Erick (2101) 1/2-1/2
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d3 b5 7.Bb3 d6 8.a4 Rb8 9.axb5 axb5 10.c3 O-O 11.d4 exd4 12.cxd4 Bg4 13.Nc3 Qd7 14.d5 Ne5 15.Nxe5 dxe5 16.f3 Bc5+ 17.Kh1 Bh5 18.Qe2 Ne8 19.Be3 Bxe3 20.Qxe3 Bg6 21.f4 exf4 22.Rxf4 Nd6 23.e5 Rfe8 24.Qa7 1/2-1/2
2019.10.22 23rd Hoogeveen Open 2019
2061497 GM Basso, Pier Luigi (2575) IM Wiersma, E (2321) 1-0
1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.h3 Bg7 8.e4 O-O 9.Bd3 a6 10.a4 Nh5 11.O-O Nd7 12.Bg5 Bf6 13.Be3 Re8 14.Re1 Ne5 15.Be2 Nxf3+ 16.Bxf3 Ng7 17.Bf4 Rb8 18.Rc1 Be5 19.Qd2 Bd7 20.Bg4 f6 21.Rb1 Qc8 22.Bxd7 Qxd7 23.Bh2 b5 24.axb5 axb5 25.b4 Bxh2+ 26.Kxh2 Rec8 27.f4 Ne8 28.bxc5 Rxc5 29.Ne2 f5 30.Ng3 Nf6 31.exf5 gxf5 32.Rb3 Rxd5 33.Qb2 Qf7 34.Nf1 Nh5 35.Rbe3 Nxf4 36.Re7 Qg6 37.R1e3 Qxg2+ 38.Qxg2+ Nxg2 39.Rg3+ Kh8 40.Rxg2 Rg8 41.Ra2 Rd1 42.Ng3 Rd5 43.Rf7 b4 44.Nh5 b3 45.Nf6 bxa2 46.Rxh7# 1-0
2019.10.21 23rd Hoogeveen Open 2019
2064114 IM Wiersma, E (2321) Faber, H FRA (2077) 1-0
1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Qxd5 5.Ngf3 cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Nxd4 a6 11.Re1 Be7 12.c3 O-O 13.Qf3 Qc7 14.Bb3 Bd6 15.h3 e5 16.Nc2 e4 17.Qe2 h6 18.Be3 Be5 19.Rad1 Bf5 20.Qc4 Qxc4 21.Bxc4 Rac8 22.Bb3 Rfd8 23.Bb6 Rd6 24.Rxd6 Bxd6 25.Bd4 Re8 26.Bxf6 gxf6 27.Bd5 Re7 28.Ne3 Bg6 29.g4 Bc5 30.Kg2 Kg7 31.Nf5+ Bxf5 32.gxf5 e3 33.fxe3 b5 34.e4 a5 35.a3 Rc7 36.Kf3 Bd6 37.Rd1 Be5 38.Rd2 Rc8 39.Bb7 Rc7 40.Ba6 Rc5 41.Rd5 Rxd5 42.exd5 b4 43.cxb4 axb4 44.axb4 Bxb2 45.d6 Kf8 46.b5 Be5 47.d7 Ke7 48.Bc8 Bc7 49.Kg4 Bb6 50.Kh5 Be3 51.h4 Kd8 52.b6 Bxb6 53.Kxh6 1-0
2019.10.20 23rd Hoogeveen Open 2019
2064078 Slagboom, Leandro (1954) IM Wiersma, E (2321) 1/2-1/2
1.Nf3 Nf6 2.c4 c5 3.b3 e6 4.g3 d5 5.cxd5 exd5 6.Bg2 Nc6 7.Bb2 Be7 8.O-O O-O 9.d4 Ne4 10.Nc3 Bf6 11.e3 Re8 12.Rc1 Bg4 13.dxc5 Nxc3 14.Rxc3 Qe7 1/2-1/2
2019.10.19 23rd Hoogeveen Open 2019
2064046 IM Wiersma, E (2321) Emans, Job (2028) 1/2-1/2
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 d6 7.c3 Be7 8.a4 Bb7 9.Re1 O-O 10.d4 Re8 11.Nbd2 Bf8 12.d5 Ne7 13.c4 c6 14.dxc6 Nxc6 15.axb5 axb5 16.Rxa8 Qxa8 17.cxb5 Nb4 18.Bc4 Nxe4 19.Bxf7+ Kxf7 20.Nxe4 Kg8 21.Nxd6 Rd8 22.Qb3+ Bd5 23.Qxb4 1/2-1/2
2019.07.20 13th Leiden Open A 2019
2356979 IM Wiersma, E (2344) Van der Marel, B (2106) 1-0
1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.Nf3 e5 5.Bc4 Be7 6.a4 c6 7.O-O h6 8.b3 Qa5 9.Bb2 Nb6 10.Be2 Bg4 11.Qd3 Nbd7 12.Rfe1 Nh5 13.g3 Rd8 14.d5 O-O 15.Nd2 f5 16.Bxg4 fxg4 17.dxc6 bxc6 18.Qc4+ Kh8 19.Qxc6 d5 20.exd5 Bc5 21.Re2 Bd4 22.Nc4 Qb4 23.Na2 Qb8 24.Bxd4 exd4 25.Qg6 Ndf6 26.d6 1-0
2019.07.19 13th Leiden Open A 2019
2356965 Miettinen, T (2021) IM Wiersma, E (2344) 1/2-1/2
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 a6 5.f3 b5 6.Qd2 Nbd7 7.O-O-O Bb7 8.g4 Nb6 9.g5 Nh5 10.b3 e5 11.Bh3 Be7 12.Nge2 O-O 13.Bg4 exd4 14.Nxd4 Ng7 15.h4 c5 16.Nde2 b4 1/2-1/2
2019.07.18 13th Leiden Open A 2019
2356952 IM Wiersma, E (2344) FM Al Hageri, B (2077) 1/2-1/2
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 exd4 7.Re1 d5 8.Nxd4 Bd6 9.Nxc6 Bxh2+ 10.Kxh2 1/2-1/2
2019.07.15 13th Leiden Open A 2019
2356929 IM Wiersma, E (2344) Mijnster, N (2089) 1/2-1/2
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Nd7 6.O-O Ne7 7.Nbd2 f6 8.exf6 gxf6 9.c4 Ng6 10.Re1 Bd6 11.Nf1 O-O 12.Ne3 Be4 13.Nd2 f5 14.f3 f4 15.Ng4 Bf5 16.Nh6+ Kh8 17.Nxf5 Rxf5 18.Bd3 Rf6 19.Nf1 1/2-1/2
2019.07.14 13th Leiden Open A 2019
2356916 Le Clercq, Maxim (1930) IM Wiersma, E (2344) 0-1
1.d4 Nf6 2.Bf4 c5 3.d5 g6 4.Nc3 Bg7 5.Qd2 a6 6.a4 Qa5 7.Ra3 O-O 8.Nf3 e6 9.e4 Qb4 10.Rb3 Nxe4 11.Qe3 Bxc3+ 12.bxc3 Qxa4 13.Bd3 exd5 14.O-O Nc6 15.Bh6 Re8 16.Qf4 f5 17.Ng5 Ne5 18.f3 Nxc3 19.Qd2 Qd4+ 20.Kh1 Nb5 21.Re1 c4 22.Nxh7 Kxh7 23.Qg5 Nf7 24.Qd2 Rxe1+ 25.Qxe1 Nxh6 0-1
2019.07.13 13th Leiden Open A 2019
2356907 IM Wiersma, E (2344) Cchung, Nyuk Lyn (1787) 0-1
1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Nxd7 5.O-O e6 6.c4 Ngf6 7.Nc3 Be7 8.d4 cxd4 9.Nxd4 a6 10.b3 O-O 11.Bb2 Qb6 12.Qd2 Rac8 13.Kh1 Rfd8 14.Rae1 Nc5 15.f4 Nfd7 16.e5 dxe5 17.fxe5 h6 18.Qf2 Rf8 19.Qg3 Rcd8 20.Rf3 Nb8 21.Qg4 Nc6 22.Nxc6 bxc6 23.Bc1 Kh7 24.Ref1 Qc7 25.Bxh6 Qxe5 26.Bxg7 Qxg7 27.Rh3+ Kg8 28.Rg3 Qxg4 29.Rxg4+ Kh7 30.b4 Rd3 31.Ne2 Nd7 32.Nf4 Re3 0-1
2019.07.12 13th Leiden Open A 2019
2356895 Henseler, J (1997) IM Wiersma, E (2344) 0-1
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Na6 7.O-O c5 8.d5 Rb8 9.a4 Nb4 10.Bc4 e6 11.dxe6 fxe6 12.Bb3 d5 13.f5 c4 14.Bf4 Ra8 15.e5 Nh5 16.f6 cxb3 17.Bg5 Qb6+ 18.Kh1 bxc2 19.Qd2 Nxf6 20.exf6 Rxf6 21.Bxf6 Bxf6 22.Qf4 Kg7 23.Ne5 Qd8 24.Qxb4 Bxe5 25.Rae1 Qd6 26.Qh4 Bd7 27.Rxe5 Qxe5 28.Qe7+ Kh6 29.Qh4+ Qh5 30.Qf2 Qg5 31.Ne2 e5 32.h4 Qe7 33.Nc3 Bc6 34.h5 Rf8 35.Qd2+ Qg5 0-1
2019.06.23 HSG Open 2019
2378152 IM Wiersma, E (2332) GM L'Ami, E (2648) 1-0
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Ne7 6.O-O Nd7 7.Nbd2 Nc8 8.Nb3 Be7 9.a4 O-O 10.a5 a6 11.c4 Na7 12.Be3 Bg4 13.h3 Bh5 14.g4 Bg6 15.Nfd2 dxc4 16.Bxc4 c5 17.f4 cxd4 18.Nxd4 Bc5 19.N2b3 Be4 20.Nxc5 Nxc5 21.b4 Nd7 22.Nxe6 Qh4 23.Kh2 Nxe5 24.fxe5 fxe6 25.Bxa7 Rxf1 26.Qxf1 Qg5 27.Bd4 Rd8 28.Bxe6+ Kh8 29.Qf2 h5 30.Rf1 h4 31.Qe3 1-0
2019.06.23 HSG Open 2019
2378165 IM Wiersma, E (2332) IM Beerdsen, Thomas (2488) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 Qa5 10.O-O Qe5 11.Qd3 h5 12.Nc2 Ng4 13.g3 g5 14.h3 Nf6 15.b4 Nd7 16.f4 gxf4 17.gxf4 Qg7+ 18.Kh1 Rg8 19.Qf3 Bf6 20.Bd2 Nd4 21.Nxd4 Bxd4 22.Rad1 Nf8 23.f5 Bd7 24.Bh6 Qxh6 25.Rxd4 exf5 26.exf5 O-O-O 27.Nd5 Re8 28.Qxh5 Rh8 29.Qxh6 Rxh6 30.Bg4 Bc6 31.Kh2 Nh7 32.f6+ Kb8 33.Ne7 1/2-1/2
2019.06.22 HSG Open 2019
2378149 Hommes, E (2123) IM Wiersma, E (2332) 0-1
1.d4 Nf6 2.Nf3 c5 3.c4 cxd4 4.Nxd4 Nc6 5.Nc3 Qb6 6.Nc2 e6 7.e4 Bc5 8.Qe2 Nd4 9.Nxd4 Bxd4 10.Bd2 d6 11.O-O-O Bd7 12.g4 h6 13.Bg2 Bxf2 14.h4 h5 15.gxh5 Nxh5 16.Rdf1 Bd4 17.Rh3 Rc8 18.b3 Qc5 19.Kb1 Be5 20.Qf3 Nf6 21.Rc1 Bc6 22.Bf4 Bxf4 23.Qxf4 Qe5 24.Qxe5 dxe5 25.Bf3 Ke7 26.Rg1 g6 27.Kb2 Rh6 28.b4 b6 29.Rg5 Rch8 30.h5 Nxh5 31.c5 bxc5 32.b5 Rb8 33.a4 a6 34.Rxe5 axb5 35.Rxc5 Nf4 36.Rxh6 Nd3+ 37.Kc2 Nxc5 38.axb5 Bxb5 39.Rh1 Bc6 40.Rh3 Rb4 41.Rh4 Rd4 42.Rg4 f6 43.Rxg6 0-1
2019.05.11 Dutch League 2018-19
2393570 IM Wiersma, E (2328) FM Schoorl, R (2275) 1-0
1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.h3 d6 5.f4 e5 6.dxe5 Qh4+ 7.Ke2 dxe5 8.Nf3 Bg4 9.g3 Bxf3+ 10.Kxf3 Qe7 11.Bd3 exf4 12.gxf4 Nd7 13.Be3 g5 14.Qg1 h6 15.h4 Bxc3 16.bxc3 gxf4 17.Bxf4 Ne5+ 18.Bxe5 Qxe5 19.Qd4 Qf6+ 20.Ke2 Rd8 21.Qxa7 Qxc3 22.Raf1 Nf6 23.Qf2 Rd6 24.Rh3 Kd8 25.Qb6+ Kc8 26.Rb1 Nxe4 27.Qxb7+ Kd8 28.Qb8+ Kd7 29.Qa7+ Ke6 30.Qe3 f5 31.Bxe4 Qxe3+ 32.Rxe3 fxe4 33.Rxe4+ Kd5 34.Re3 Rg6 35.Rb4 Kc5 36.Rf4 Rg2+ 37.Kd3 Rd8+ 38.Kc3 Rd6 39.Re5+ Kb6 40.a4 Rdd2 41.Rb4+ Kc7 42.Rb2 Rdf2 43.Re4 Rf5 44.Rc4 Rg3+ 45.Kb4 Rh3 46.Rb3 Rh1 47.Rbc3 Kb7 48.Rg3 Rh5 49.Rg7+ Kb6 50.Rg6 R5xh4 51.Rxc6+ Kb7 52.Rc7+ Kb8 53.Rh7 Rxc4+ 54.Kxc4 h5 55.Kc5 h4 56.c4 h3 57.Kc6 h2 58.Rh8+ Ka7 59.c5 Ra1 60.Rxh2 Rxa4 61.Kc7 Ka6 62.c6 Ka7 63.Kc8 Rg4 64.Rd2 Kb6 65.c7 Rg8+ 66.Rd8 Rg7 67.Rd6+ Kc5 68.Rh6 1-0
2019.04.13 Dutch League 2018-19
2409624 IM Wiersma, E (2335) Schouten, Jordy (2078) 0-1
1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.Bxc6+ bxc6 5.O-O e5 6.c3 f5 7.exf5 Be7 8.d4 e4 9.Nfd2 Nf6 10.dxc5 d5 11.Nb3 Bxf5 12.Nd4 Bd7 13.b4 Qc7 14.Qd2 Ng4 15.Qf4 Ne5 16.Na3 g5 17.Qg3 h5 18.f3 h4 19.Qe1 O-O-O 20.Qe2 Rhf8 21.Rb1 exf3 22.Qa6+ Kb8 23.gxf3 Ka8 24.Be3 Bh3 25.Rf2 g4 26.f4 g3 27.hxg3 hxg3 28.Rd2 Bc8 29.Qe2 Ng4 30.Rf1 Rh8 31.Nf3 Bf6 32.Bd4 Qh7 33.Qg2 Bxd4+ 34.Rxd4 Ne3 35.Ng5 Qh2+ 0-1
2019.04.07 TCh-BEL 2018-19
2411195 IM Wiersma, E (2336) Nottet, Tristan (1911) 1-0
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Qc7 7.a3 Bc5 8.Be2 Bxd4 9.Qxd4 Nc6 10.Qe3 O-O 11.O-O Na5 12.e5 Ne8 13.Na4 Nxc4 14.Bxc4 b5 15.Nb6 Rb8 16.Nxc8 bxc4 17.Nd6 Nxd6 18.exd6 Qxd6 19.Bd2 Qc6 20.Bc3 d5 21.Rfe1 Rfe8 22.Qg5 1-0
2019.03.16 Dutch League 2018-19
2419758 FM Van der Poel, H (2223) IM Wiersma, E (2337) 1/2-1/2
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be2 c5 7.dxc5 Qa5 8.O-O Qxc5+ 9.Kh1 Nbd7 10.Bd3 b6 11.Qe1 Bb7 12.Qh4 Qh5 13.Bd2 Qxh4 14.Nxh4 Nc5 15.Rae1 Nfd7 16.Nf3 Rac8 17.Re3 Nxd3 18.cxd3 Nc5 19.Rd1 Ne6 20.f5 Nd4 21.Nxd4 Bxd4 22.Rf3 f6 23.Rdf1 Be5 24.Kg1 Rfd8 25.fxg6 hxg6 26.Re1 Kg7 27.Rh3 Rh8 28.Rxh8 Rxh8 29.h3 Ba6 30.Nd5 Bxd3 31.Nxe7 Bxb2 32.Bb4 Be5 33.Nc6 Bf4 34.g3 Bh6 35.Bxd6 Bd2 36.Rd1 Be3+ 37.Kh2 Bb5 38.Nxa7 Bd7 39.Bf8+ Rxf8 40.Rxd7+ Kh6 41.Kg2 Re8 42.Kf3 Bc5 43.Rf7 f5 44.exf5 1/2-1/2
2019.02.24 79th Noteboom Open
2425932 FM Bekker, Stefan (2257) IM Wiersma, E (2338) 1-0
1.e4 d6 2.d4 Nf6 3.Nc3 e5 4.Nf3 Nbd7 5.Bc4 Be7 6.O-O Nb6 7.Be2 exd4 8.Nxd4 O-O 9.Kh1 d5 10.e5 Ne8 11.f4 c5 12.Nb3 g6 13.Bf3 Be6 14.a4 a5 15.Qe1 Qd7 16.Qf2 d4 17.Ne4 Nxa4 18.Rxa4 Qxa4 19.Nexc5 Bxc5 20.Nxc5 Qc4 21.Nxe6 fxe6 22.Bxb7 Rd8 23.Be4 a4 24.Bd3 Qb4 25.h4 Ng7 26.g4 Rd7 27.Qg2 Kh8 28.Kh2 Qb7 29.Be4 Qb4 30.Kh3 Rdf7 31.Bd3 Qb7 32.Be4 Qb4 33.Qe2 Qc5 34.Rf3 Qb4 35.Bd3 Qb7 36.Qe4 Rb8 37.Kg3 Qxe4 38.Bxe4 Rc7 39.Ra3 Rc4 40.Bd3 Rcb4 41.Kf3 Kg8 42.Bd2 Rxb2 43.Rxa4 Rd8 44.Bb4 h5 45.Bxg6 hxg4+ 46.Kxg4 Nf5 47.Bxf5 exf5+ 48.Kxf5 Rxc2 49.Bd6 d3 50.Rd4 d2 51.e6 Ra8 52.Be5 Kf8 53.Bf6 Ke8 54.Kg6 Rc4 55.Rxd2 Rxf4 56.Bg5 Re4 57.Rd6 Re1 58.h5 Re5 59.Bf6 Re1 60.h6 Rg1+ 61.Bg5 Rxg5+ 62.Kxg5 Ke7 63.Rb6 Ra1 64.Rb4 Ra5+ 65.Kg6 1-0
2019.02.23 79th Noteboom Open
2425919 IM Wiersma, E (2338) IM Slingerland, F (2355) 1/2-1/2
1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nc6 6.Qe2 g6 7.c3 Bg7 8.Rd1 e5 9.b4 cxb4 10.cxb4 Nxb4 11.d4 exd4 12.Nxd4 Ne7 13.Bb2 O-O 14.Na3 1/2-1/2
2019.02.22 79th Noteboom Open
2425872 IM Wiersma, E (2338) Oosterom, E (2108) 1-0
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Bb4+ 6.Nbd2 Nd7 7.O-O Ba5 8.c3 Ne7 9.Nh4 Bg6 10.Nxg6 hxg6 11.Nf3 Bc7 12.Re1 c5 13.Bg5 cxd4 14.Qxd4 Bb6 15.Qb4 f6 16.exf6 gxf6 17.Bb5 Kf7 18.Qg4 Nf5 19.Bxf6 Kxf6 20.Rxe6+ Kxe6 21.Qxg6+ Nf6 22.Ng5+ Kd6 23.Nf7+ Kc5 24.a4 Bc7 25.Nxd8 Raxd8 26.Qxf6 Bxh2+ 27.Kf1 Ne3+ 28.fxe3 Rhf8 29.b4# 1-0
2019.02.09 Dutch League 2018-19
2432726 FM Roos, Ad (2304) IM Wiersma, E (2336) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b6 7.Bg5 h6 8.Bh4 Ba6 9.e3 d6 10.Bd3 Nbd7 11.Nf3 c5 12.O-O cxd4 13.exd4 Rc8 14.Qb4 d5 15.b3 dxc4 16.bxc4 Qc7 17.Bg3 Qc6 18.a4 Rfd8 19.Rfc1 Nh5 20.a5 Nxg3 21.axb6 Bb7 22.hxg3 axb6 23.Rab1 Ba8 1/2-1/2
2018.12.15 Dutch League 2018-19
2460594 IM Wiersma, E (2339) FM Dardha, A (2279) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Bxc6 dxc6 5.d3 Bg7 6.h3 Nf6 7.Nc3 Nd7 8.Be3 e5 9.Qd2 h6 10.O-O b6 11.a3 Qe7 12.Nh2 Nf8 13.b4 Ne6 14.Na4 f5 15.f3 f4 16.Bf2 Bd7 17.bxc5 b5 18.Nb2 Nxc5 19.a4 a6 20.Qa5 Kf7 21.Qb6 1/2-1/2
2018.11.24 Dutch League 2018-19
2474864 IM Kuipers, S (2472) IM Wiersma, E (2336) 1/2-1/2
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 a6 5.Qd2 b5 6.f3 Nbd7 7.O-O-O Bb7 8.h4 h5 9.Kb1 Bg7 10.Nh3 e6 11.Ng5 Qe7 12.d5 exd5 13.exd5 b4 14.Nce4 Bxd5 15.Nxf6+ Nxf6 16.Bd3 O-O 17.Rhe1 a5 18.g4 hxg4 19.h5 gxh5 20.Bf4 Qd7 21.Qh2 Rfe8 22.fxg4 Rxe1 23.Rxe1 Qxg4 24.Rg1 Qd7 25.Nh7 Qe6 26.Ng5 Qd7 27.Nh7 Qe6 28.Ng5 Qd7 29.Nh7 1/2-1/2
2018.10.06 Dutch League 2018-19
2482204 FM Van der Lende, I (2331) IM Wiersma, E (2336) 1/2-1/2
1.d4 Nf6 2.Nf3 c5 3.d5 e6 4.c4 exd5 5.cxd5 d6 6.Nc3 g6 7.Bf4 a6 8.a4 Bg7 9.h3 O-O 10.e3 Re8 11.Nd2 Nfd7 12.Be2 Ne5 13.Bh2 f5 14.O-O Nbd7 15.e4 Nf6 16.f4 Nf7 17.exf5 gxf5 18.Bd3 Bd7 19.a5 b5 20.axb6 Qxb6 21.Nc4 Qb7 22.Qf3 Qb4 23.Kh1 Ne4 24.Rfc1 Bb5 25.Na2 Qb3 26.Bxe4 Bxc4 27.Rxc4 Qxb2 28.Rf1 Rxe4 29.Rxe4 fxe4 30.Qxe4 Qxa2 31.f5 Bf6 32.Qe6 Kg7 33.Bf4 Qa4 34.Rf3 h6 35.Bxh6+ Nxh6 36.Rg3+ Kh7 37.Qxf6 Rg8 38.Qe7+ Kh8 39.Qf6+ Kh7 40.Rxg8 Nxg8 41.Qxd6 c4 42.Qc7+ Kh6 43.Qf4+ Kh7 44.Qh4+ Kg7 45.Qd4+ Kf7 46.Qe4 Qa1+ 47.Kh2 Qf6 48.Qxc4 Qd6+ 49.g3 Ne7 50.Qg4 Kf6 51.h4 Nxf5 52.Qg5+ Ke5 53.Qf4+ 1/2-1/2
2018.08.02 Condigne Dutch Open 2018
2528720 IM Wiersma, E (2346) Zwirs, Jasper (2124) 1/2-1/2
1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.Bxc6+ bxc6 5.O-O Bg4 6.h3 Bh5 7.e5 e6 8.exd6 Bxd6 9.d3 Nf6 10.Nbd2 O-O 11.Qe2 Qc7 12.Nc4 Rae8 13.Bd2 e5 14.Rad1 Nd5 15.g4 1/2-1/2
2018.08.01 Condigne Dutch Open 2018
2528693 FM Anand, N (2346) IM Wiersma, E (2346) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.g3 c5 4.Nf3 cxd4 5.Nxd4 d5 6.Bg2 e5 7.Nf3 d4 8.O-O Nc6 9.e3 Be7 10.exd4 exd4 11.Bf4 O-O 12.Ne5 Qb6 13.Qb3 Na5 14.Qb5 Be6 15.b3 Qxb5 16.cxb5 a6 17.b6 Nd5 18.Bd2 Bd6 1/2-1/2
2018.07.31 Condigne Dutch Open 2018
2528673 IM Wiersma, E (2346) Go, B (2162) 1-0
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bd3 O-O 6.Nf3 Na6 7.O-O c5 8.d5 Nc7 9.a4 Rb8 10.Bc4 a6 11.a5 Nd7 12.Qe1 b5 13.axb6 Nxb6 14.Bd3 e6 15.dxe6 Bxe6 16.f5 Bc4 17.Qg3 Re8 18.Bf4 Bf8 19.Ng5 Nb5 20.fxg6 fxg6 21.Bxc4+ Nxc4 22.Qd3 Nxc3 23.Qxc4+ d5 24.Qxc3 Bg7 25.Qh3 Bd4+ 26.Kh1 Rb7 27.Ne6 Qf6 28.exd5 Rf7 29.c3 Be5 30.Qd3 1-0
2018.07.28 Condigne Dutch Open 2018
2536175 FM Van Dael, Siem (2212) IM Wiersma, E (2346) 1-0
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 a6 5.a4 Bg7 6.f3 O-O 7.Qd2 e5 8.Nge2 exd4 9.Nxd4 Nc6 10.Be2 Re8 11.O-O d5 12.Nxc6 bxc6 13.Rad1 Be6 14.Bd4 Qe7 15.Qe3 Bf8 16.b4 Nd7 17.Rb1 a5 18.exd5 cxd5 19.b5 Qh4 20.g3 Qh3 21.Qf2 Bd6 22.f4 h5 23.Bf3 Qf5 24.h4 Rad8 25.Nd1 Nf6 26.Ne3 Ne4 27.Nxf5 Nxf2 28.Nxd6 Nh3+ 29.Kh2 1-0
2018.07.27 Condigne Dutch Open 2018
2536145 IM Wiersma, E (2346) Krishnater, Kushager (2209) 0-1
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Bd3 h6 9.Ne4 Nd5 10.Ng3 Nf4 11.Be4 f5 12.Bf3 e4 13.Nxe4 fxe4 14.Bxe4 Bd6 15.g3 O-O 16.gxf4 Qh4 17.d3 Bg4 18.Qd2 Bxf4 19.Qxf4 Rxf4 20.Bxf4 Qf6 21.Bc1 Rf8 22.f3 Bxf3 0-1
2018.07.26 Condigne Dutch Open 2018
2536106 IM Lobanov, Sergei (2521) IM Wiersma, E (2346) 1-0
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 a6 5.f3 b5 6.Qd2 Nbd7 7.a4 b4 8.Na2 a5 9.Bb5 Bb7 10.d5 Bg7 11.Ne2 O-O 12.Nd4 Ne5 13.c3 e6 14.Nc6 Bxc6 15.dxc6 Nxe4 16.fxe4 Qh4+ 17.Bf2 Qxe4+ 18.Kf1 bxc3 19.Nxc3 Qb4 20.Qe2 Ng4 21.Nd1 Nxf2 22.Qxf2 d5 23.h4 d4 24.Rh3 e5 25.h5 Rae8 26.Qe1 Qxe1+ 27.Kxe1 gxh5 28.Rxh5 f5 29.Rc1 e4 30.Rc5 Be5 31.Bc4+ Kg7 32.Rxa5 Bg3+ 33.Kf1 Kg6 34.Rh3 Bd6 35.Rd5 d3 36.Nc3 Re5 37.b4 Rfe8 38.Rxe5 Bxe5 39.Nd5 h5 40.a5 Kg5 41.b5 Ra8 42.a6 f4 43.b6 cxb6 44.c7 Rc8 45.a7 Ra8 46.c8=Q Rxc8 47.Nxb6 e3 48.Bxd3 Rc1+ 49.Ke2 1-0
2018.07.25 Condigne Dutch Open 2018
2536080 IM Wiersma, E (2346) GM Hausrath, D (2495) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Bxc6 bxc6 5.O-O Bg7 6.Re1 Nf6 7.e5 Nd5 8.c4 Nc7 9.b3 d5 10.Ba3 Ne6 11.cxd5 cxd5 12.d4 cxd4 13.Nxd4 Qb6 14.Nxe6 fxe6 15.Nd2 Rf8 16.Nf3 Bd7 17.Qd2 Rc8 18.Nd4 Bh6 19.Qd3 Qa5 20.Bb2 Qd2 1/2-1/2
2018.06.24 HSG Open 2018
2563861 IM Lanchava, T (2297) IM Wiersma, E (2344) 0-1
1.c4 Nf6 2.Nc3 c5 3.g3 e6 4.e4 Nc6 5.f4 d6 6.Bg2 Be7 7.Nf3 O-O 8.O-O a6 9.a4 Qc7 10.Kh1 b6 11.d3 Bb7 12.Be3 Rad8 13.Qe2 d5 14.cxd5 exd5 15.e5 d4 16.exf6 Bxf6 17.Ne4 dxe3 18.Nxf6+ gxf6 19.Qxe3 Rfe8 20.Qd2 Nb4 21.Ra3 Qd7 22.Ne1 Bxg2+ 23.Qxg2 Re3 24.a5 Rde8 25.Nf3 b5 26.g4 Nxd3 27.f5 Ne1 28.Nxe1 Rxe1 29.Rf3 R8e2 30.Qg3 Qd1 31.Kg1 Re3 32.Qb8+ Kg7 33.Kg2 Rxf3 34.Rxe1 Qd5 35.Kg1 Qd4+ 36.Kh1 Qxb2 37.Rg1 h6 38.Qd6 Rf2 39.Qg3 Qe2 40.h4 Qe4+ 0-1
2018.06.24 HSG Open 2018
2563870 IM Wiersma, E (2344) IM Ten Hertog, H (2453) 0-1
1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Be3 a6 5.f4 b5 6.Bd3 Bb7 7.Nf3 Nf6 8.e5 Ng4 9.Qe2 c5 10.dxc5 dxe5 11.O-O Nd7 12.Be4 Bxe4 13.Nxe4 Qc7 14.fxe5 Nxe3 15.Qxe3 Nxe5 16.Rae1 O-O 17.b4 a5 18.a3 Nc4 19.Qf2 h6 20.Nd4 Nxa3 21.c3 axb4 22.cxb4 Bxd4 23.Qxd4 Nc2 24.Qd2 Nxe1 25.Qxh6 Qe5 0-1
2018.06.23 HSG Open 2018
2563853 IM Wiersma, E (2344) De Boer, Bas (2137) 1-0
1.e4 c5 2.Nf3 e6 3.g3 Nc6 4.Bg2 Nf6 5.Qe2 d6 6.O-O Be7 7.Rd1 d5 8.e5 Nd7 9.c3 d4 10.d3 O-O 11.Na3 Rb8 12.Nc2 dxc3 13.bxc3 b6 14.d4 cxd4 15.Nfxd4 Na5 16.Nb4 Qc7 17.Nbc6 Nxc6 18.Nxc6 Nc5 19.Nxb8 Qxb8 20.Ba3 Ba6 21.Qe3 Rc8 22.Rd4 1-0
2018.06.23 HSG Open 2018
2563839 FM Huesmann, T (2170) IM Wiersma, E (2344) 1/2-1/2
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.e5 Nfd7 7.Bc4 Nb6 8.Bb3 dxe5 9.fxe5 c5 10.dxc5 Qxd1+ 11.Nxd1 N6d7 12.e6 Nxc5 13.exf7+ Kh8 14.Be3 Nxb3 15.axb3 Nc6 16.c3 Be6 17.b4 Bc4 18.Bf2 Rxf7 19.Ne3 Ba6 20.Ng5 Rf6 21.Ne4 Rff8 22.Bg3 Rad8 23.Nc5 Nxb4 24.Nxa6 Nd3+ 25.Ke2 bxa6 26.Nc4 Nxb2 27.Nxb2 Bxc3 28.Nd3 Bxa1 29.Rxa1 Rf5 30.Rxa6 Rd7 31.Be5+ Kg8 32.Ra5 Rb7 33.g4 Rf8 1/2-1/2
2018.04.29 TCh-BEL 2017-18
2585500 IM Wiersma, E (2342) FM Lenaerts, L (2289) 1/2-1/2
1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4 5.Bc4 Bc5 6.Nxe5 Qe7 7.Nf3 d5 8.Bxd5 Bg4 9.d3 c6 10.Bb3 Nd7 11.Be3 Ne5 12.Nxd4 Bxd1 13.Nf5 Qf8 14.Bxc5 Qxc5 15.d4 Qf8 16.Rxd1 Ng6 17.e5 O-O-O 18.O-O Ne7 19.Nd6+ Rxd6 20.exd6 Nf5 21.Ne4 1/2-1/2
2018.04.21 Dutch League 2017-18
2587694 IM Wiersma, E (2342) Duijn, Ro (2177) 1-0
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 h6 6.O-O Ne7 7.Nbd2 Ng6 8.Nb3 Nd7 9.Ne1 Ne7 10.a4 c5 11.Nxc5 Nxc5 12.dxc5 Nc6 13.Nd3 Bxd3 14.Qxd3 Bxc5 15.Bf4 Qh4 16.Bg3 Qd4 17.c3 Qxd3 18.Bxd3 a5 19.Kh1 O-O 20.f4 g6 21.Bh4 Rac8 22.Rad1 Rc7 23.g4 Rd7 24.Bb5 Rc7 25.Rf3 Ra8 26.Bg3 Bf8 27.Bf2 Bg7 28.Bb6 Rcc8 29.Rdf1 Ne7 30.Bd7 Rc4 31.Bb5 Rcc8 32.Bd7 Rc4 33.b3 Re4 34.Bb5 g5 35.fxg5 hxg5 36.Rxf7 Ng6 37.Bd3 Nf4 38.Rxg7+ Kxg7 39.Bxe4 dxe4 40.Re1 Nd5 41.Bd4 Rf8 42.c4 Nf4 43.Rxe4 Rd8 44.h4 Ne2 45.Bf2 Rd2 46.hxg5 Nc1 47.Bb6 Nxb3 48.Re3 Rb2 49.Rh3 Nd2 50.Bd8 Ne4 51.Bf6+ Nxf6 52.gxf6+ Kg8 53.g5 Re2 54.g6 Rxe5 55.f7+ 1-0
2018.04.07 Dutch League 2017-18
2585446 FM Lammens, Tim (2279) IM Wiersma, E (2342) 0-1
1.Nf3 Nf6 2.g3 c5 3.Bg2 Nc6 4.c4 g6 5.O-O Bg7 6.d4 cxd4 7.Nxd4 O-O 8.Nc3 Qa5 9.Nb3 Qh5 10.e4 d6 11.Qxh5 Nxh5 12.Nd5 a5 13.Rb1 a4 14.Na1 Be6 15.Bg5 Nf6 16.Nc2 Bxd5 17.exd5 Ne5 18.b3 axb3 19.axb3 h6 20.Be3 Nfd7 21.Bh3 Nc5 22.f4 Ned3 23.Rfd1 Nb2 24.Re1 Nxb3 25.Bf1 Na5 26.Bd4 Nbxc4 27.Bxc4 Nxc4 28.Rxb7 Ra2 29.Bxg7 Kxg7 30.Nb4 Rb2 31.Rexe7 Na5 32.Rb5 Rc8 33.Re1 Nc4 34.Rb7 Na5 35.Rb5 Nc4 36.Rb7 Kg8 37.Rc1 Re8 38.Rc7 Ne3 39.Rc8 Rxc8 40.Rxc8+ Kg7 41.Nc6 Rg2+ 42.Kh1 Rd2 43.h3 Rxd5 44.Rd8 Rd1+ 45.Kh2 Rd2+ 46.Kh1 Nf5 47.Rd7 Nxg3+ 48.Kg1 Ne2+ 49.Kf2 Nxf4+ 50.Ke3 Rc2 51.Nd8 g5 52.Nxf7 Kg6 53.Nxd6 Rc3+ 54.Ke4 Nxh3 55.Rd8 Nf2+ 56.Kd5 Rf3 57.Rg8+ Kh5 58.Ke6 Nh3 59.Nf5 Nf4+ 60.Kd6 Ng6 61.Ng7+ Kg4 62.Ne6 Rf6 63.Kd7 h5 64.Ra8 h4 65.Ra4+ Nf4 66.Nc5 h3 67.Ne4 Rf5 68.Ra3 Re5 69.Nf2+ Kh4 70.Rf3 Re2 71.Kd6 h2 72.Nh1 Re1 0-1
2018.03.11 TCh-BEL 2017-18
2585476 IM Wiersma, E (2342) GM Dgebuadze, A (2522) 1/2-1/2
1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 c5 6.c3 Nc6 7.Ne2 cxd4 8.cxd4 f6 9.exf6 Nxf6 10.O-O Bd6 11.Nf3 Qc7 12.Bg5 O-O 13.Rc1 Bd7 14.Re1 Rac8 15.h3 h6 16.Be3 Qb8 17.Nc3 Be8 18.Nb5 Bb4 19.Bd2 Bxd2 20.Qxd2 a6 21.Nc3 Bh5 22.Be2 b5 23.Ne5 Bxe2 24.Nxc6 Rxc6 25.Qxe2 Qc8 1/2-1/2
2018.03.10 Dutch League 2017-18
2604736 IM Wiersma, E (2342) FM Vedder, R (2253) 1/2-1/2
1.e4 e5 2.Nf3 Nc6 3.Nc3 Bb4 4.Nd5 Nf6 5.Nxb4 Nxb4 6.d4 exd4 7.e5 Qe7 8.Be2 Ng4 9.O-O Nxe5 10.Nxd4 O-O 11.Nf5 Qf6 12.Ne3 d6 13.Bd2 Nbc6 14.Bc3 Qd8 15.f4 1/2-1/2
2018.02.04 TCh-BEL 2017-18
2622564 FM Toulzac, PY (2213) IM Wiersma, E (2342) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.h3 Bg7 8.Bf4 O-O 9.e3 Na6 10.Nd2 Nc7 11.Nc4 b5 12.Nxd6 b4 13.Na4 Nfxd5 14.Nxc8 Nxf4 15.Qxd8 Rxd8 16.Ne7+ Kf8 17.Nc6 Nd3+ 18.Bxd3 Rxd3 19.Na5 Ne6 20.Rd1 Rxd1+ 21.Kxd1 f5 22.Kc2 f4 23.exf4 Rc8 24.Kb3 Nxf4 25.g3 Nd3 26.f4 Bd4 27.Kc4 Nxb2+ 28.Nxb2 Bxb2 29.Rd1 Bd4 30.Nb3 Bf2 1/2-1/2
2018.02.03 Dutch League 2017-18
2622406 IM Wiersma, E (2342) GM Werle, J (2527) 1/2-1/2
1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Qxd5 5.Ngf3 cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Nxd4 a6 11.Re1 Qc7 12.Qe2 Bc5 13.c3 Bxd4 14.cxd4 b5 15.Bb3 Bb7 16.Bxe6 fxe6 17.Qxe6+ Kf8 18.Bf4 Qxf4 19.Qe7+ Kg8 20.Qe6+ Kf8 21.Qe7+ 1/2-1/2
2017.12.16 Dutch League 2017-18
2648893 GM Ftacnik, L (2545) IM Wiersma, E (2342) 1-0
1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.d4 Be7 5.Bg2 O-O 6.O-O b6 7.cxd5 exd5 8.Nc3 Bb7 9.Bf4 Na6 10.Rc1 c5 11.dxc5 Nxc5 12.Nb5 Ne6 13.Be5 Ne4 14.Bh3 N4g5 15.Nxg5 Nxg5 16.Bg2 Bc5 17.b4 Be7 18.Rc7 Ba6 19.Qa4 Bc8 20.Rd1 Be6 21.Nd4 Bd6 22.Nxe6 1-0
2017.10.14 33rd ECC Open 2017
2671980 IM Wiersma, E (2341) FM Apaydin, F (2262) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.Nge2 c6 8.Qb3 Nbd7 9.O-O-O Qe7 10.g4 a6 11.Qa3 exd4 12.Nxd4 Ne5 13.g5 Nh5 14.Be2 Bh3 15.f4 Ng4 16.Bxg4 Bxg4 17.Rd2 c5 18.Nc2 b5 19.e5 dxe5 20.Bxc5 Qb7 21.Rg1 Be6 22.fxe5 Bxe5 23.Bxf8 Rxf8 24.Kb1 bxc4 25.Rgd1 Qc7 26.Nd4 Bg4 27.Nd5 Qb7 28.Ne7+ Kg7 29.Re1 f6 30.Nec6 Qc7 31.h3 Bc8 32.Rde2 Rf7 33.Nxe5 fxe5 34.Rxe5 h6 35.Re7 Qd8 36.gxh6+ Kxh6 1-0
2017.10.13 33rd ECC Open 2017
2671890 IM Wiersma, E (2341) FM Lavendelis, E (2274) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Be3 Qa5 9.Nd2 cxd4 10.Nc4 Qd8 11.cxd4 O-O 12.Rc1 f5 13.Qb3 Kh8 14.Ne5 Bxe5 15.dxe5 Nc6 16.Bh6 Qa5+ 17.Qc3 Qxc3+ 18.Rxc3 Rd8 19.exf5 Bxf5 20.Be2 Rac8 21.Be3 Nxe5 22.Rxc8 Bxc8 23.Bxa7 Nd3+ 24.Bxd3 Rxd3 25.Ke2 Ra3 26.Bd4+ Kg8 27.Ra1 Be6 28.Bc5 Rxa2+ 29.Rxa2 Bxa2 30.Bxe7 b5 1/2-1/2
2017.10.12 33rd ECC Open 2017
2671758 GM Rodshtein, M (2699) IM Wiersma, E (2341) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 Be7 6.e3 h6 7.Bh4 O-O 8.Bd3 b6 9.Nge2 Bb7 10.O-O Nbd7 11.Rc1 c5 12.Bf5 Re8 13.Qc2 c4 14.b3 a6 15.a4 Nf8 16.bxc4 dxc4 17.Rb1 g6 18.Bxf6 Bxf6 19.Be4 Rb8 20.Bxb7 Rxb7 21.Rb4 Be7 22.Rxc4 b5 23.Rc6 b4 24.Ne4 b3 25.Qc4 a5 26.N2c3 Rb4 27.Qd5 b2 28.Rb1 Qxd5 29.Nxd5 Rxa4 30.Rc2 Rb8 31.Nec3 Ra1 32.Nxe7+ Kg7 33.Rxb2 1-0
2017.10.11 33rd ECC Open 2017
2671638 IM Wiersma, E (2341) GM Abasov, N (2587) 0-1
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3 c5 5.d5 b5 6.e4 O-O 7.Bg5 h6 8.Bh4 d6 9.dxe6 Bxe6 10.cxb5 Re8 11.a3 Bxc3+ 12.bxc3 g5 13.Bf2 d5 14.Bxc5 Nbd7 15.Bd4 dxe4 16.Kf2 Qc7 17.Ne2 Rad8 18.h4 g4 19.f4 Nc5 20.g3 Nb3 21.Rb1 e3+ 22.Kg1 Nd2 23.Rh2 Nf3+ 24.Kh1 Ne4 25.Qc1 Bc4 26.Rg2 Nf2+ 27.Rxf2 exf2 28.Qb2 Qb7 0-1
2017.10.10 33rd ECC Open 2017
2671548 IM Wiersma, E (2341) Nalbant, Tuna Onat (2034) 1/2-1/2
1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bg7 7.a7 Rxa7 8.e4 O-O 9.Nf3 e6 10.dxe6 fxe6 11.Bd3 d5 12.O-O Nc6 13.Bg5 h6 14.Bh4 g5 15.exd5 exd5 16.Bg3 c4 17.Be2 Re8 18.Re1 Ba6 19.a4 Rb7 20.Qc2 Ne4 21.Nb5 Bxb5 22.axb5 Rxb5 23.Bxc4 Rxb2 24.Qa4 Rb4 25.Qxc6 Rxc4 26.Qg6 Rf8 27.Be5 Qe7 28.Bxg7 Qxg7 29.Qxg7+ Kxg7 30.Ra7+ Kf6 31.Ra6+ Kg7 32.Ne5 Rc7 33.f3 1/2-1/2
2017.10.09 33rd ECC Open 2017
2674600 Osttveit, M (2073) IM Wiersma, E (2341) 0-1
1.e4 c5 2.Nc3 e6 3.Nf3 Nc6 4.g3 Nf6 5.Bg2 Be7 6.d4 cxd4 7.Nxd4 d5 8.Be3 O-O 9.O-O Ne5 10.Nde2 Nc4 11.Bc1 dxe4 12.Qxd8 Rxd8 13.Nxe4 Nxe4 14.Bxe4 f5 15.Bg2 Bf6 16.Nf4 Rb8 17.Re1 Kf7 18.Nd3 e5 19.f3 Be6 20.Rb1 Rbc8 21.b3 Nd2 22.Bxd2 Rxc2 23.Nxe5+ Bxe5 24.Be3 Rxa2 25.f4 Bc3 26.Rec1 Rd3 27.Bf2 b6 0-1
2017.10.08 33rd ECC Open 2017
2674511 IM Wiersma, E (2341) Mc Morrow, J (2012) 1/2-1/2
1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Bd7 8.Nf3 Nf6 9.Qb3 Bc5 10.Bg5 h6 11.Bxf6 Qxf6 12.Ne4 Qe7 13.Nxc5 Qxc5 14.e3 Rc8 15.Bb5 a6 16.Bxc6 Bxc6 17.O-O Bxf3 18.gxf3 b5 19.Rad1 O-O 20.Rd5 Qc2 21.Qxc2 Rxc2 22.Rb1 Rfc8 23.Kf1 R8c4 24.Rd6 a5 25.a3 Rh4 26.Kg2 Rhc4 27.Rd5 Re2 28.Rxb5 Rcc2 29.Rf1 Rxe3 30.Rxa5 Rxb2 31.Kg3 Rc3 32.a4 1/2-1/2
2017.10.07 Dutch League 2017-18
2678303 IM Wiersma, E (2341) FM Wantola, I (2316) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 d5 5.Bg2 O-O 6.cxd5 exd5 7.e3 c6 8.Ne2 Bf5 9.O-O Na6 10.f3 Re8 11.Qb3 c5 12.dxc5 Bd3 13.Rd1 Bc4 14.Qc2 Bxc5 15.Nd4 Nb4 16.Qb1 Rc8 17.Kh1 Bxd4 18.Rxd4 Qb6 19.Bd2 Nc6 20.Rf4 Ne5 21.Rd4 Qa6 22.Qd1 Nd3 23.Qc2 Nb4 24.Qd1 Nc6 25.Rf4 Ne5 26.Rd4 Bd3 27.Be1 Bf1 28.Bf2 Bxg2+ 29.Kxg2 Nc4 30.Nxd5 Nxd5 31.Rxd5 Nxe3+ 32.Bxe3 Rxe3 33.Rd8+ Re8 34.Rxc8 Rxc8 35.Qd2 h5 36.a3 Qb5 37.Re1 g6 38.Re4 Qb3 39.Rb4 Rc2 40.Rxb3 Rxd2+ 41.Kh3 b6 42.g4 hxg4+ 43.fxg4 Kg7 44.Rb5 f6 45.a4 Rd3+ 46.Kg2 Rd4 47.a5 bxa5 48.Kg3 Rb4 49.Rxa5 Rb3+ 50.Kf4 g5+ 51.Kf5 Rf3+ 52.Ke6 Re3+ 53.Kd6 Re4 54.h3 Rb4 55.Rxa7+ Kg6 56.Ra3 Rxb2 57.Rf3 Rb5 58.Kc6 Re5 59.Kd6 Kf7 60.Ra3 Rb5 61.Rf3 Ra5 62.Re3 Ra4 63.Kd5 Kg6 64.Rb3 Rf4 65.Ra3 f5 66.Ra6+ Kf7 67.Ra7+ Kg6 1/2-1/2
2017.09.16 Dutch League 2017-18
2686759 FM Kollen, Z (2295) IM Wiersma, E (2342) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be3 Nf6 7.Qd2 e5 8.Nb3 Bb4 9.f3 d5 10.exd5 Nxd5 11.Bc5 Nxc3 12.Bxb4 Qxd2+ 13.Kxd2 Nxb4 14.Kxc3 Nd5+ 15.Kd2 Bf5 16.c4 Nf4 17.Kc3 O-O-O 18.Nc5 Rd4 19.g3 Ne6 1/2-1/2
2017.08.03 Dutch Open 2017
2710593 De Boer, Bas (2079) IM Wiersma, E (2352) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Nf3 Be7 5.Bf4 O-O 6.e3 b6 7.Bd3 Bb7 8.cxd5 exd5 9.h3 c5 10.O-O c4 11.Bc2 a6 12.a4 Nbd7 13.Ne5 Ne8 14.Qf3 Nxe5 1/2-1/2
2017.08.02 Dutch Open 2017
2710573 IM Wiersma, E (2352) Ciornei, D (2118) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c5 7.dxc5 dxc5 8.Bxc5 Nc6 9.Be3 Nd7 10.Nge2 Nde5 11.Qxd8 Rxd8 12.Nf4 e6 13.Rc1 b6 14.Kf2 Bb7 15.Be2 Nb4 16.a3 Nbd3+ 17.Nxd3 Nxd3+ 18.Bxd3 Rxd3 19.Rhd1 Rad8 20.Rxd3 Rxd3 21.Ke2 Rd7 22.b4 f5 23.exf5 gxf5 24.Na4 Kf7 25.b5 Bf8 26.c5 bxc5 27.Bxc5 Bh6 28.Be3 Bf8 29.Rc3 Bd5 30.b6 axb6 31.Nxb6 Rb7 32.a4 Bb4 33.Nxd5 Bxc3 34.Nxc3 Rb3 35.Bd2 e5 36.a5 Ke6 37.a6 Rb6 38.Na4 Rb8 39.a7 Ra8 40.Be3 e4 41.fxe4 fxe4 42.Bd4 1-0
2017.08.01 Dutch Open 2017
2710543 Elgersma, Simon (2120) IM Wiersma, E (2352) 1-0
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Nxc6 bxc6 7.Bd3 d5 8.O-O Nf6 9.Re1 Be7 10.e5 Nd7 11.Qg4 g6 12.Bh6 Rb8 13.Nd1 Qc7 14.Qg3 f5 15.c4 d4 16.Re2 c5 17.f3 Rb6 18.Nf2 Rg8 19.Nh3 g5 20.f4 g4 21.Ng5 Rg6 22.Qh4 Bf8 23.Qh5 Bxh6 24.Nxh7 Kf7 25.Bxf5 exf5 26.e6+ Kg7 27.e7 Kxh7 28.e8=Q Rbf6 29.Qxh6+ 1-0
2017.07.31 Dutch Open 2017
2710518 IM Wiersma, E (2352) Van Dael, Siem (2132) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.h3 e5 7.d5 Nh5 8.Be3 a5 9.a3 Qe8 10.c5 f5 11.Nb5 Qe7 12.cxd6 cxd6 13.Nd2 Nf6 14.Bd3 fxe4 15.Nxe4 Nxe4 16.Bxe4 Bf5 17.Qd3 Nd7 18.Nc3 1/2-1/2
2017.07.29 Dutch Open 2017
2713574 GM Ikonnikov, Vy (2538) IM Wiersma, E (2352) 1-0
1.d4 Nf6 2.Nf3 e6 3.c4 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 h6 7.Bf4 b6 8.cxd5 Nxd5 9.Nxd5 exd5 10.Bd3 c5 11.O-O Nc6 12.Bb5 Bb7 13.Qa4 Qc8 14.dxc5 bxc5 15.Rac1 Qe6 16.Nd4 Nxd4 17.exd4 c4 18.Rce1 Qf6 19.Be5 Qh4 20.g3 Qg5 21.Bd7 Qd2 22.a3 Bf6 23.Rd1 Qe2 24.Rfe1 Qf3 25.Re3 Qh5 26.g4 Qg5 27.h4 Qxh4 28.Bg3 Qh3 29.g5 1-0
2017.07.28 Dutch Open 2017
2710487 IM Wiersma, E (2352) Bakker, Guido (2167) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c5 7.dxc5 dxc5 8.Bxc5 Nc6 9.Be3 Nd7 10.Nge2 Nde5 11.Qxd8 Rxd8 12.Nf4 Na5 13.Nfd5 Nexc4 14.Nxe7+ Kh8 15.Bg5 Be6 16.Ncd5 Rd7 17.Rc1 Nxb2 18.Bb5 Rdd8 19.O-O a6 20.Be2 Rd7 21.Be3 Re8 22.Bb6 Bxd5 23.Nxd5 Nc6 24.Bxa6 Nd4 25.Bc4 f5 26.Kh1 fxe4 27.fxe4 Rxe4 28.Bb5 Rxd5 29.Rc8+ Bf8 30.Rcxf8+ Kg7 31.R8f7+ Kh6 32.Bxd4 Rxb5 33.Bg7+ Kg5 34.Bf6+ Kh6 35.h4 Nd3 36.Kh2 Ne5 37.Bg5+ Kh5 38.Rxh7+ Kg4 39.Re7 Rb2 40.Rxe5 1-0
2017.07.27 Dutch Open 2017
2713549 GM Sandipan, C (2575) IM Wiersma, E (2352) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 Be7 6.e3 O-O 7.Bd3 h6 8.Bh4 b6 9.Nge2 Bb7 10.O-O c5 11.Rc1 Nbd7 12.Bb1 c4 13.f3 Re8 14.Bf2 a6 15.g4 b5 16.Nf4 Nf8 17.Kh1 Bd6 18.Nce2 Bc6 19.Rg1 Ra7 20.Qf1 Rae7 21.g5 hxg5 22.Rxg5 N8h7 23.Rg3 Kh8 24.Qh3 Rxe3 25.Bxe3 Rxe3 26.Rcg1 Bf8 27.Nh5 g6 28.Bxg6 fxg6 29.Rxg6 Be7 30.Rg7 Bd7 31.Nxf6 Bxh3 32.Rxh7# 1-0
2017.07.26 Dutch Open 2017
2713539 IM Wiersma, E (2352) GM Pruijssers, R (2508) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 O-O 5.Bg2 d5 6.cxd5 exd5 7.e3 c6 8.Ne2 Re8 9.O-O Bf5 10.f3 h6 11.Qb3 Na6 12.a3 Bxc3 13.Qxc3 Nc7 14.Nf4 Nb5 15.Qd2 Nd6 16.b3 Qb6 17.Qc3 Nb5 18.Qd2 Nd6 19.Qc3 Rac8 20.g4 Bh7 21.a4 c5 22.dxc5 Rxc5 23.Qd4 Rec8 24.Ba3 R5c6 25.Qxb6 Rxb6 26.h4 g5 27.hxg5 hxg5 28.Nh3 Bd3 29.Rfc1 Nh7 30.Rxc8+ Nxc8 31.Rc1 Rc6 32.f4 gxf4 33.Bxd5 Rxc1+ 34.Bxc1 fxe3 35.Bxe3 b6 36.Nf2 Nf6 37.Bxf7+ 1/2-1/2
2017.07.25 Dutch Open 2017
2710448 Van der Zon, S (2103) IM Wiersma, E (2352) 0-1
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be3 Nf6 7.Bd3 d5 8.exd5 exd5 9.h3 Bd6 10.O-O O-O 11.Qd2 Re8 12.Rfe1 Bc7 13.Nce2 Ne5 14.Bg5 Qd6 15.Ng3 Bd7 16.Ngf5 Bxf5 17.Bxf5 Nc4 0-1
2017.06.25 HSG Open 2017
2741318 IM Beerdsen, Thomas (2455) IM Wiersma, E (2350) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.b3 b6 4.Bd3 Bb7 5.O-O Nc6 6.Re1 d6 7.Bb2 Nf6 8.c3 Be7 9.Bf1 O-O 10.d4 d5 11.e5 Ne4 12.Nbd2 Rc8 13.Bd3 cxd4 14.Nxe4 dxe4 15.Bxe4 dxc3 16.Bxc3 Qxd1 17.Raxd1 Rfd8 18.Bb2 Na5 19.Bxb7 Nxb7 20.Kf1 Rc2 21.Rxd8+ Nxd8 22.Re2 Rxe2 23.Kxe2 Nc6 24.a3 Kf8 25.b4 b5 26.Bc3 Ke8 27.Ne1 Kd7 28.Nd3 Kc7 29.f4 h5 30.h3 g6 31.g4 hxg4 32.hxg4 a5 33.Kf3 axb4 34.axb4 Nb8 35.Ke4 Kc6 36.Ne1 1/2-1/2
2017.06.25 HSG Open 2017
2741329 IM Wiersma, E (2350) IM Ten Hertog, H (2457) 0-1
1.d4 g6 2.c4 Bg7 3.e4 d6 4.Nc3 Nf6 5.f3 c5 6.dxc5 dxc5 7.Qxd8+ Kxd8 8.Be3 Nfd7 9.O-O-O Bxc3 10.bxc3 b6 11.e5 Kc7 12.e6 fxe6 13.Nh3 Nc6 14.Ng5 e5 15.f4 Nf6 16.fxe5 Ng4 17.Re1 Nxe3 18.Rxe3 h6 19.Nf7 Rh7 20.e6 Bxe6 21.Rxe6 Rxf7 22.Rxg6 Rf2 23.Re6 Rxa2 24.Bd3 Rf8 25.Bb1 Ra4 26.Rxh6 Rf2 27.Re1 e5 28.Rh7+ Kc8 29.g4 Ra1 30.g5 Na5 0-1
2017.06.24 HSG Open 2017
2741298 Paans, Johnny (1877) IM Wiersma, E (2350) 0-1
1.e4 c5 2.c3 d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 e6 6.Be2 Nc6 7.O-O Be7 8.Be3 cxd4 9.cxd4 O-O 10.Nc3 Qd8 11.a3 b6 12.Bc4 Bb7 13.b4 Rc8 14.Qb3 Qc7 15.Nb5 Nxd4 16.Nfxd4 Qxc4 17.Qxc4 Rxc4 18.Nxa7 Ra8 19.Ndb5 Nd5 20.Rfc1 Nxe3 21.fxe3 Rxc1+ 22.Rxc1 Bg5 23.Kf2 Rd8 24.Ke2 h6 25.g3 Be4 26.Nd4 e5 27.Nf3 Bxf3+ 28.Kxf3 Rd3 29.Rc8+ Kh7 30.Nb5 Rxe3+ 31.Kf2 Rb3 32.Rc6 f5 33.h4 Be3+ 34.Ke2 f4 35.gxf4 exf4 36.h5 Rb2+ 37.Kf3 Rh2 38.Kg4 Rg2+ 39.Kf3 Rg5 40.Nd6 Rxh5 41.Nc4 Rh3+ 42.Ke4 h5 43.a4 h4 44.Nxb6 Bd2 45.Nd5 Rb3 46.b5 h3 47.Nxf4 h2 0-1
2017.06.24 HSG Open 2017
2741309 IM Wiersma, E (2350) Hilwerda, Jonas (2068) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 c5 5.Nf3 cxd4 6.Nxd4 Ne4 7.Qd3 Qa5 8.Nb3 Nxc3 9.Bd2 Ne4 10.Qxe4 Bxd2+ 11.Nxd2 O-O 12.Bg2 Nc6 13.Qe3 d5 14.O-O d4 15.Qd3 e5 16.a3 Qc7 17.b4 Be6 18.Ne4 Ne7 19.Nc5 Rab8 20.Nxe6 fxe6 21.Rac1 Rbc8 22.Qe4 b6 23.Bh3 Rf6 24.f4 Rcf8 25.fxe5 Rxf1+ 26.Bxf1 Nc6 27.Bh3 Re8 28.Rd1 h6 29.Bg2 Rc8 30.Qxc6 Qxc6 31.Bxc6 Rxc6 32.Rxd4 Rc7 33.Kf2 Kf7 34.Ke3 Ke7 35.Kd3 Rc8 36.Rd6 Rf8 37.c5 bxc5 38.bxc5 Rc8 39.Kc4 Rc7 40.c6 Kf7 41.Kc5 Ke7 42.Rd4 Ke8 43.Kd6 Rc8 44.c7 1-0
2017.05.06 Dutch League 2016-17
2760172 IM Wiersma, E (2346) Kamman, Albert 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 O-O 5.Bg2 d6 6.Nf3 Nc6 7.O-O Bxc3 8.bxc3 e5 9.c5 e4 10.Ng5 dxc5 11.d5 Qxd5 12.Nxe4 Qxd1 13.Rxd1 Nxe4 14.Bxe4 Bg4 15.f3 Be6 16.Ba3 f5 17.Bxc6 bxc6 18.Bxc5 Rfd8 19.Kf2 a6 20.a3 Rab8 21.Rxd8+ Rxd8 22.Rb1 Kf7 23.Rb7 Rd7 24.Rb8 Bc4 25.Rf8+ Kg6 26.Bd4 Re7 27.e3 Rd7 28.Ke1 Bd5 29.Kf2 Bc4 30.g4 fxg4 31.fxg4 Rf7+ 32.Rxf7 Kxf7 33.Be5 g6 34.e4 Ke6 35.Bxc7 h5 36.gxh5 gxh5 37.Ke3 Bf1 38.Kd4 Bg2 39.e5 Kd7 40.Bd6 Bf3 41.Kc5 Bd5 42.Bb8 Kc8 43.Ba7 Kd7 44.Kb6 Bc4 45.e6+ Kxe6 46.Kxc6 Be2 47.Kc5 Kd7 48.Bb8 Kc8 49.Bg3 Kb7 50.c4 Bf1 51.Kd5 Bg2+ 52.Kd6 Bf3 53.c5 1/2-1/2
2017.04.01 Dutch League 2016-17
2773158 GM Peng Zhaoqin (2368) IM Wiersma, E (2346) 1/2-1/2
1.d4 Nf6 2.Nf3 e6 3.e3 Be7 4.Bd3 d5 5.O-O O-O 6.b3 b6 7.Bb2 Bb7 8.Nbd2 Nbd7 9.Qe2 Ne4 10.c4 Nxd2 11.Nxd2 Bf6 12.e4 Nc5 13.dxc5 Bxb2 14.Rad1 bxc5 15.Nf3 dxc4 16.Bxc4 Bd4 17.Ba6 Bxa6 1/2-1/2
2017.03.11 Dutch League 2016-17
2779684 GM Klein, Da (2511) IM Wiersma, E (2346) 0-1
1.e4 c5 2.Nf3 e6 3.g3 Nc6 4.Bg2 Nf6 5.Qe2 d6 6.c3 Be7 7.d4 cxd4 8.cxd4 d5 9.e5 Ne4 10.O-O O-O 11.Be3 b6 12.Rc1 Qd7 13.Ne1 f6 14.f3 Ng5 15.exf6 Bxf6 16.Rd1 Nf7 17.Bf2 Nd6 18.Nc3 Nf5 19.Nc2 Qf7 20.f4 Bd7 21.Rd2 Rae8 22.Rad1 Kh8 23.Ne1 g5 24.fxg5 Bxg5 25.Rd3 Nb4 26.Rf3 Qg7 27.Nc2 Nc6 28.Qf1 e5 29.Nxd5 e4 30.Rxf5 Rxf5 31.Nde3 Rf7 32.Qe2 Bf6 33.Be1 Qg6 34.Bc3 Bg7 35.Re1 b5 36.Nd5 e3 37.Nf4 Rxf4 38.gxf4 b4 39.Nxb4 Nxd4 40.Bxd4 Bxd4 41.Kh1 Qg7 42.Bf3 Qh6 43.Nd5 Bc6 44.Rg1 Qd6 45.Rg5 Bxd5 46.Bxd5 Qxf4 47.Qg2 Qxg5 0-1
2017.02.04 Dutch League 2016-17
2789447 IM Wiersma, E (2346) IM Leenhouts, K (2492) 0-1
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 O-O 5.Bg2 d5 6.cxd5 exd5 7.e3 c6 8.Ne2 Re8 9.O-O Nbd7 10.f3 c5 11.a3 cxd4 12.axb4 dxc3 13.Nxc3 Ne5 14.b5 Bf5 15.g4 Bd3 16.Rf2 d4 17.exd4 Qxd4 18.Ra4 Qc5 19.g5 Rad8 20.Bd2 Bxb5 21.gxf6 Nd3 22.Ne4 Rxe4 23.Rxe4 Nxf2 0-1
2017.01.29 TCh-BEL 2016-17
2798054 IM Wiersma, E (2349) Rihouay, C (2263) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 O-O 5.Bg2 d5 6.cxd5 exd5 7.e3 c6 8.Ne2 Re8 9.O-O Nbd7 10.f3 c5 11.a3 cxd4 12.axb4 dxc3 13.Nxc3 Ne5 14.f4 Bg4 15.Qb3 Nc4 16.e4 d4 17.Qxc4 Rc8 18.Qd3 dxc3 19.Qxd8 Rcxd8 20.e5 cxb2 21.Bxb2 Nd5 22.h3 Bc8 23.Bd4 Nxb4 24.Bxa7 Nc6 25.Bb6 Rd3 26.Kh2 f6 27.exf6 gxf6 28.Rf2 Be6 29.Re2 Bf7 30.Rxe8+ Bxe8 31.Ra8 Kf7 32.Rc8 f5 33.g4 Ne7 34.Rc7 Rd7 35.Bxb7 Rxc7 36.Bxc7 Bc6 37.Ba6 Be4 38.Kg3 Kg6 39.Bd6 Nd5 40.Bb5 Kf7 41.Bd7 Nf6 42.Bc8 fxg4 43.hxg4 Bd5 44.Be5 Bc6 45.g5 Bd7 46.Bb7 Ng8 47.Be4 Ne7 48.Bxh7 Bf5 49.Bxf5 Nxf5+ 50.Kf3 Kg6 51.Bf6 Nh4+ 52.Ke4 Nf5 53.Ke5 Nh4 54.Ke6 Nf5 55.Bc3 Nh4 56.Be1 Nf5 57.Bf2 Ng7+ 58.Ke5 1/2-1/2
2016.12.17 Dutch League 2016-17
2814992 FM Ondersteijn, N (2391) IM Wiersma, E (2346) 1/2-1/2
1.b3 e5 2.Bb2 Nc6 3.e3 d5 4.Bb5 f6 5.d4 exd4 6.Qxd4 Ne7 7.Nc3 Be6 8.O-O-O a6 9.Bxc6+ Nxc6 10.Qh4 Ne7 11.Nge2 c6 12.e4 Qa5 13.exd5 Nxd5 14.Nxd5 Bxd5 15.Qh5+ g6 16.Qh3 Bg7 17.c4 Bf7 18.Qd7+ Kf8 19.Qxb7 Re8 20.Rd7 Bh6+ 21.Kb1 Be6 22.Rxh7 Rxh7 23.Qxh7 Bg7 24.Nd4 Bf5+ 25.Nxf5 Qxf5+ 26.Ka1 Re2 27.Qh4 Rxf2 28.Rd1 Rxg2 29.Qd4 Kg8 30.h4 Kh7 31.c5 Qh5 32.Rb1 Rxb2 33.Rxb2 f5 34.Qd7 Kh8 35.Kb1 Bxb2 36.Kxb2 Qe2+ 37.Ka3 Qb5 38.Qd8+ Kh7 39.Qe7+ 1/2-1/2
2016.11.26 Dutch League 2016-17
2817796 IM Wiersma, E (2346) IM Van de Oudeweetering, A (2292) 1/2-1/2
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Qc2 Bd6 7.b3 O-O 8.Bb2 e5 9.dxe5 Nxe5 10.O-O-O Bg4 11.Nxe5 Bxe5 12.f3 Bd7 13.g4 dxc4 14.Bxc4 b5 15.Bd3 b4 16.Na4 Bxb2+ 17.Nxb2 Nd5 18.Nc4 Qh4 19.Rd2 Be6 20.g5 a5 21.f4 Nc3 22.a4 Rfe8 23.Ne5 1/2-1/2
2016.11.05 Dutch League 2016-17
2829169 IM Lubbe, N (2485) IM Wiersma, E (2346) 1-0
1.Nf3 Nf6 2.d4 g6 3.Nbd2 Bg7 4.e3 O-O 5.b3 c5 6.Bb2 cxd4 7.exd4 Nc6 8.Be2 Nd5 9.O-O Nf4 10.Re1 Nxe2+ 11.Qxe2 d6 12.Rad1 Re8 13.Nc4 Bg4 14.Ne3 Bxf3 15.Qxf3 Rc8 16.c4 e6 17.Re2 d5 18.Red2 dxc4 19.bxc4 Qa5 20.d5 exd5 21.cxd5 Ne5 22.Bxe5 Rxe5 23.d6 Bh6 24.d7 Rd8 25.Rd5 Rxd5 26.Nxd5 Bg7 27.Qe4 Qb5 28.h4 h5 29.Qe7 Qxd7 30.Qxd7 Rxd7 31.Nf6+ Bxf6 32.Rxd7 b5 33.Rxa7 b4 34.Rb7 Bc3 35.Kf1 1-0
2016.10.08 Dutch League 2016-17
2842569 IM Wiersma, E (2346) GM Brandenburg, D (2506) 1/2-1/2
1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Be7 6.e3 c6 7.Bd3 Nbd7 8.Nge2 Nh5 9.Bxe7 Qxe7 10.g4 Nhf6 11.Ng3 g6 12.Qf3 Nf8 13.g5 Ng8 14.h4 h6 15.gxh6 Nxh6 16.Kd2 Bg4 17.Qg2 Qf6 18.f4 O-O-O 19.h5 Ne6 20.hxg6 fxg6 21.Nge2 Bf5 22.Rag1 Rdg8 23.Bxf5 gxf5 24.Qf3 Ng4 25.Nc1 Rg6 26.Nd3 Rgh6 27.Ne5 Nxe5 28.fxe5 Qf7 29.Rxh6 Rxh6 30.Ne2 Rh2 31.Rg2 1/2-1/2
2016.09.17 Dutch League 2016-17
2850346 GM Reinderman, D (2571) IM Wiersma, E (2346) 1/2-1/2
1.c4 Nf6 2.Nc3 g6 3.e4 Bg7 4.d4 O-O 5.Be2 d6 6.Nf3 Bg4 7.Be3 Nfd7 8.Rc1 c5 9.d5 a6 10.a4 Qb6 11.Qc2 Bxf3 12.Bxf3 Bd4 13.Bh6 Re8 14.b3 Nf6 15.Kf1 Nbd7 16.Ne2 Ne5 17.Nxd4 cxd4 18.Qd1 d3 19.h4 Qd4 20.Be3 Qb2 21.Bd2 Neg4 22.Bxg4 Nxg4 23.f3 Ne5 24.Bc3 Qa3 25.Kf2 f6 26.f4 Qc5+ 27.Kf1 Rf8 28.Rh3 f5 29.exf5 Rxf5 30.g3 Qe3 31.Kg2 Raf8 32.Qe1 Qf3+ 33.Kh2 Ng4+ 34.Kg1 Rxf4 35.gxf4 Qxh3 36.Qe6+ Rf7 37.Qc8+ Rf8 38.Qe6+ 1/2-1/2
2016.07.23 10th Leiden Open A 2016
2884768 GM Pavlovic, Milos (2475) IM Wiersma, E (2354) 1-0
1.d4 Nf6 2.Nf3 g6 3.Bg5 Bg7 4.c3 O-O 5.Nbd2 Nc6 6.e4 d5 7.Bxf6 Bxf6 8.exd5 Qxd5 9.Bc4 Qd8 10.O-O e6 11.Re1 Ne7 12.Ne4 Bg7 13.Ne5 Nd5 14.Qf3 c6 15.Rad1 Qc7 16.Bb3 Kh8 17.c4 Ne7 18.Qf4 Qa5 19.Nxf7+ Kg8 20.Qg5 Nf5 21.Nfd6 Bh6 22.Qg4 Nxd4 23.Nf6+ Rxf6 24.Qxd4 Bg7 25.c5 Kh8 26.Ne8 Rf7 27.Qd8 Qxd8 28.Rxd8 Rd7 29.Rd1 Bd4 30.Rxd4 1-0
2016.07.22 10th Leiden Open A 2016
2884744 IM Wiersma, E (2354) IM Sukandar, I (2419) 0-1
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 O-O 5.Bg2 d5 6.cxd5 exd5 7.e3 Re8 8.Ne2 c6 9.O-O Na6 10.f3 Nc7 11.Qb3 Bf8 12.e4 c5 13.Be3 c4 14.Qc2 b5 15.Bg5 b4 16.Nxd5 Ncxd5 17.exd5 h6 18.Bxf6 Qxf6 19.Rfe1 Bf5 20.Qd2 Rac8 21.a3 bxa3 22.bxa3 Bd3 23.Nf4 Qxd4+ 24.Kh1 Bd6 25.Nxd3 cxd3 26.Red1 Bc5 27.f4 Rb8 28.Rab1 Rxb1 29.Rxb1 Re2 30.Qd1 Qf2 31.Qf1 d2 0-1
2016.07.21 10th Leiden Open A 2016
2884729 Sahil, Tic (2016) IM Wiersma, E (2354) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Nf3 d6 6.Be2 Bg4 7.O-O Nfd7 8.Be3 Nc6 9.d5 Bxf3 10.gxf3 Na5 11.Rc1 c5 12.b3 a6 13.Qd2 Re8 14.Bg5 Rb8 15.f4 b5 16.cxb5 axb5 17.Nxb5 Nf6 18.Nc3 Rb4 19.Bf3 Qd7 20.Qe2 h5 21.Kh1 Nh7 22.Rg1 Nxg5 23.Rxg5 Bh6 24.Rcg1 Bxg5 25.Rxg5 Qh3 26.f5 Qh4 27.Qe3 Kh7 28.Ne2 c4 29.fxg6+ fxg6 30.Ng3 Rg8 31.Bxh5 cxb3 32.axb3 Rxb3 33.Qc1 Rxg3 34.fxg3 Qxe4+ 35.Kg1 Nb3 36.Bxg6+ Rxg6 37.Rh5+ Kg7 38.Qc3+ Qd4+ 39.Qxd4+ Nxd4 40.Kg2 Rh6 41.Rg5+ Kf6 42.h4 Nf5 43.Kf3 Nxh4+ 44.gxh4 Rxh4 45.Rg8 Rd4 46.Rf8+ Kg7 47.Rf5 Kg6 48.Rf8 Rxd5 49.Ke4 Re5+ 0-1
2016.07.19 10th Leiden Open A 2016
2884712 IM Wiersma, E (2354) De Niet, GM (2165) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Be3 Qa5 9.Nd2 cxd4 10.Nc4 Qd8 11.cxd4 O-O 12.Rc1 b5 13.Nd2 Qa5 14.Be2 e6 15.O-O Bd7 16.Nb3 Qd8 17.Nc5 Bc6 18.Bf3 b4 19.d5 exd5 20.exd5 Bb5 21.d6 Bxf1 22.Bxa8 Bb5 23.Qd5 Nd7 24.Nb7 Qxa8 25.Qxb5 Nb6 26.Rc7 Bf6 27.Qc6 Qe8 28.Qxe8 Rxe8 29.d7 Rf8 30.Bxb6 axb6 31.Rc8 Be7 32.Re8 1-0
2016.07.18 10th Leiden Open A 2016
2884683 GM Ikonnikov, Vy (2538) IM Wiersma, E (2354) 1-0
1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 O-O 5.e4 d6 6.Be2 Bg4 7.Be3 Nfd7 8.Rc1 c5 9.d5 Na6 10.Qd2 Nc7 11.Bh6 Bxh6 12.Qxh6 Bxf3 13.Bxf3 e5 14.h4 Qe7 15.Be2 a6 16.a4 Ne8 17.Rh3 Ng7 18.Rd1 f5 19.Qg5 Nf6 20.h5 gxh5 21.Bxh5 h6 22.Qg3 f4 23.Qg6 Nxh5 24.Rxh5 Rf6 25.Qg4 f3 26.gxf3 Rf4 27.Qg2 Kh7 28.Rh3 Raf8 29.Ke2 Rh4 30.Rxh4 Qxh4 31.Rh1 Qf6 32.Nd1 Qf7 33.Qh3 h5 34.Ne3 b5 35.cxb5 axb5 36.a5 Ra8 37.Rg1 Rxa5 38.Nf5 Nxf5 39.exf5 Ra4 40.f6 Kh6 41.Qe6 Ra7 42.Qxd6 Rd7 43.Qxe5 Qxd5 44.Qe3+ Kh7 45.Qe4+ Kh8 46.Qe8+ 1-0
2016.07.17 10th Leiden Open A 2016
2884671 IM Wiersma, E (2354) Ratsma, Midas (2171) 1-0
1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bg7 7.a7 Rxa7 8.e4 O-O 9.Nf3 e6 10.dxe6 fxe6 11.Bd3 d5 12.O-O Qb6 13.exd5 Nxd5 14.Nb5 Rd7 15.Qe2 Nc6 16.a4 Kh8 17.Ra3 e5 18.Ng5 Na5 19.Be4 Bf6 20.Nxh7 Rxh7 21.Bxd5 Bf5 22.Be3 Rd8 23.Qf3 Rh4 24.Qd1 Nc4 25.Rc3 Be6 26.g3 Rxd5 27.Qf3 Kg7 28.gxh4 Nxb2 29.Bh6+ Kf7 30.Bg5 Qd8 31.Nc7 Rd4 32.Nxe6 Kxe6 33.Bxf6 Qxf6 34.Qxf6+ Kxf6 35.a5 Ra4 36.Rxc5 Nc4 37.Re1 Nd2 38.Kg2 e4 39.h5 gxh5 40.Rxh5 Nf3 41.Rxe4 1-0
2016.07.16 10th Leiden Open A 2016
2888714 GM Postny, E (2625) IM Wiersma, E (2354) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Nf3 c6 6.Be2 d5 7.e5 Ne4 8.O-O b6 9.Be3 Nxc3 10.bxc3 Ba6 11.Nd2 Nd7 12.a4 dxc4 13.Bxc4 Bxc4 14.Nxc4 b5 15.Nd2 Nb6 16.axb5 cxb5 17.Qb3 Qd7 18.Ra5 Rfc8 19.Rfa1 a6 20.Rxa6 Rxa6 21.Rxa6 Nd5 22.e6 fxe6 23.Ne4 Nxe3 24.fxe3 Qd5 25.Qxd5 exd5 26.Nc5 e5 27.Rb6 Bh6 28.Kf2 exd4 29.exd4 Bd2 30.Rxb5 Bxc3 31.Ke3 Be1 32.Nd3 Bh4 33.Rxd5 Rc2 34.Nf4 g5 35.Ne2 g4 36.Re5 Kf7 37.Nf4 h6 38.Rf5+ Kg7 39.Rc5 Ra2 40.Ke4 Bg5 41.Ne6+ Kg6 42.Nxg5 hxg5 43.Rc6+ Kh5 44.g3 Rxh2 45.Rc3 Kg6 46.d5 Re2+ 47.Re3 Ra2 48.Ke5 Rf2 49.d6 Rf3 50.Ke4 Rxe3+ 51.Kxe3 Kf6 52.Kd4 Ke6 53.Kc5 Kd7 54.Kd5 Kd8 55.Ke6 Ke8 56.Kf5 Kd7 57.Kxg4 Kxd6 58.Kxg5 Ke7 59.Kg6 Kf8 60.g4 Kg8 61.g5 1-0
2016.07.15 10th Leiden Open A 2016
2888707 IM Wiersma, E (2354) Schroeder, Marc 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 Bb4 6.e3 O-O 7.Bd3 h6 8.Bh4 c5 9.Ne2 cxd4 10.exd4 Nc6 11.O-O Be6 12.Rc1 Bd6 13.Bg3 Rc8 14.Bb1 Re8 15.Qd3 g6 16.Qd2 Bf8 17.Nf4 Ne4 18.Nxe4 dxe4 19.Nxe6 Rxe6 20.d5 Re8 21.Rfd1 Nb8 22.Rxc8 Qxc8 23.d6 Qd7 24.Qd5 Re6 25.Bxe4 Nc6 26.Bf3 Bg7 27.Qb5 a6 28.Bxc6 bxc6 29.Qb8+ Kh7 30.Qc7 Qe8 31.h3 Bf6 32.d7 Qd8 33.Rc1 Kg7 34.Rxc6 Qxc7 35.Rxc7 Re1+ 36.Kh2 Rd1 37.b4 Bd8 38.Ra7 a5 39.bxa5 Rd5 40.Bc7 Bf6 41.Bb6 Rd6 42.Rb7 Rd5 43.a6 1-0
2016.04.23 Dutch League 2015-16
2923179 Halfhide, Sebastian (2102) IM Wiersma, E (2343) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Nxc6 bxc6 7.Bd3 d5 8.O-O Nf6 9.Re1 Be7 10.e5 Nd7 11.b3 O-O 12.Bb2 f5 13.exf6 Rxf6 14.Na4 e5 15.Bxe5 Nxe5 16.Rxe5 Bd6 17.Re1 Bd7 18.g3 Qc7 19.Bf1 Qa7 20.Qd2 Raf8 21.Qe3 d4 22.Qd3 Rxf2 23.Bg2 c5 24.Rf1 Bb5 1/2-1/2
2016.04.02 Dutch League 2015-16
2926864 Lecomte, Robin (2318) IM Wiersma, E (2343) 1/2-1/2
1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.c4 b6 6.d4 Bb7 7.Nc3 Ne4 8.Qc2 Nxc3 9.Qxc3 c5 10.Be3 d6 11.Qd2 Nd7 12.Bh6 Nf6 13.Bxg7 Kxg7 14.Nh4 Bxg2 15.Nxg2 cxd4 16.Qxd4 Rc8 17.Ne3 Qc7 18.Rac1 Qc5 19.Qxc5 Rxc5 20.Rc2 Rfc8 21.Rfc1 Ra5 22.a3 Rac5 23.f3 d5 1/2-1/2
2016.03.19 Dutch League 2015-16
2934208 IM Wiersma, E (2343) IM Riemersma, L (2441) 0-1
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 c6 6.Qc2 Be7 7.e3 Nbd7 8.Bd3 Nh5 9.Bxe7 Qxe7 10.Nge2 g6 11.O-O-O Nb6 12.h3 Ng7 13.Ng3 Bd7 14.Kb1 O-O-O 15.Na4 Kb8 16.Rc1 Nxa4 17.Qxa4 Rhe8 18.Qa5 Ne6 19.Rc3 b6 20.Qa3 Qxa3 21.Rxa3 c5 22.dxc5 bxc5 23.Rd1 Bc6 24.Ne2 c4 25.Bc2 d4 26.Nxd4 Nxd4 27.exd4 Bxg2 28.Rc3 Bd5 29.b3 Rc8 30.bxc4 Rxc4 31.Rxc4 Bxc4 32.Rd2 Kc7 33.Bb3 Bxb3 34.axb3 Re4 35.Kc2 Rh4 36.Kc3 Rxh3+ 37.Kc4 Rh5 38.Ra2 Kb6 39.Rd2 Rf5 40.Kd3 Kc6 41.Kc4 h5 42.b4 h4 43.Ra2 Kb6 44.d5 h3 45.d6 h2 46.d7 Kc7 47.Rxa7+ Kd8 0-1
2016.02.13 Dutch League 2015-16
2943635 FM Hummel, E (2301) IM Wiersma, E (2343) 0-1
1.e4 c5 2.Nf3 e6 3.c3 d5 4.e5 d4 5.Bd3 Bd7 6.cxd4 cxd4 7.Nxd4 Nc6 8.Nf3 Qc7 9.O-O Nxe5 10.Be4 Bd6 11.d4 Nxf3+ 12.Qxf3 Nf6 13.Nc3 O-O 14.Qh3 Nxe4 15.Nxe4 Be7 16.Ng3 e5 17.Qh5 exd4 18.Rd1 Qc5 19.Qf3 Bc6 20.Qf4 Rad8 21.Nf5 Bf6 22.Nh6+ Kh8 23.Ng4 Be7 24.Ne5 Bd6 25.Nd3 Qh5 26.g4 Qh3 27.Ne5 Qg2# 0-1
2016.01.31 TCh-BEL 2015-16
2950408 Herman, J (2203) IM Wiersma, E (2343) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Be2 c6 6.Nf3 d5 7.e5 Ne4 8.Qb3 Nxc3 9.bxc3 dxc4 10.Bxc4 c5 11.e6 Nc6 12.exf7+ Kh8 13.O-O Na5 14.Qa4 a6 15.Bd3 Rxf7 16.Be3 Bd7 17.Qc2 cxd4 18.Bxd4 Nc6 19.Ng5 Rf8 20.Bxg7+ Kxg7 21.Rad1 Qa5 22.Nxh7 Rf5 23.Be4 Be6 24.Rfe1 Rc8 25.Bxf5 Bxf5 26.Qb2 Kxh7 27.Qxb7 Qxa2 28.Ra1 Qd2 1/2-1/2
2016.01.09 Dutch League 2015-16
2956242 IM Wiersma, E (2343) FM Goormachtigh, J (2211) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Be3 Qa5 9.Nd2 cxd4 10.Nc4 Qd8 11.cxd4 f5 12.Rc1 O-O 13.Qb3 Kh8 14.Ne5 Nc6 15.Nf7+ Rxf7 16.Qxf7 fxe4 17.Bc4 Bf5 18.O-O Qd6 19.Qd5 Qxd5 20.Bxd5 Nxd4 21.Rfe1 Nb5 22.Bxb7 Rb8 23.Ba6 Nc3 24.a3 Rb3 25.Bc5 Bf6 26.Re3 Be6 27.Bb4 Na2 28.Rxb3 Nxc1 29.Re3 Bd5 30.Bc5 Bg5 31.Rc3 Bd2 32.Rc2 Bg5 33.Bd4+ Kg8 34.Rc5 e6 35.Rc7 Nb3 36.Bxa7 Bf6 37.Be3 Bb2 38.a4 h5 39.Bb7 Be5 40.Rd7 1-0
2015.12.12 Dutch League 2015-16
2966531 GM Ikonnikov, Vy (2518) IM Wiersma, E (2343) 1/2-1/2
1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 O-O 5.e4 c6 6.e5 Ne8 7.Bd3 d6 8.exd6 Nxd6 9.O-O Bg4 10.Be3 Nd7 11.c5 Nf5 12.Bxf5 Bxf5 13.Nh4 Be6 14.Qd2 b6 15.Bh6 bxc5 16.Bxg7 Kxg7 17.dxc5 Nxc5 18.Qg5 Qb6 19.Qxe7 Rfe8 20.Qg5 f6 21.Qg3 Rad8 22.Rad1 Rxd1 23.Rxd1 Qxb2 24.h3 Qb8 25.f4 Rd8 26.Rxd8 Qxd8 27.f5 Bf7 28.fxg6 Bxg6 29.Nf5+ Kh8 30.Qe3 Bxf5 31.Qxc5 Qb6 32.Na4 Qxc5+ 33.Nxc5 Kg7 34.Kf2 Kf7 35.Ke3 Be6 36.a4 Bd5 37.g3 Ke7 38.a5 Kd6 39.Kd4 Bg2 40.h4 Bd5 41.Nd3 Ke6 42.Nf4+ Kf5 43.Nxd5 cxd5 44.Kxd5 Kg4 45.a6 Kxg3 46.Kc6 f5 47.Kb7 f4 48.Kxa7 f3 49.Kb6 f2 50.a7 f1=Q 51.a8=Q Qf6+ 52.Kc5 Qe5+ 53.Kc4 Qf4+ 54.Kd3 Qxh4 55.Qg8+ Kh2 56.Qa2+ Kh3 57.Qe6+ Qg4 58.Qxg4+ Kxg4 59.Ke2 Kg3 1/2-1/2
2015.11.07 Dutch League 2015-16
2975630 IM Wiersma, E (2343) Dek, L (2230) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.d5 exd5 5.cxd5 d6 6.e4 g6 7.Nge2 Bg7 8.Ng3 O-O 9.Be2 a6 10.a4 Re8 11.O-O Nbd7 12.f3 h5 13.Bg5 Qa5 14.Qc1 Nh7 15.Bh4 Ne5 16.f4 Bh6 17.Qc2 Ng4 18.Nd1 Bg7 19.Ra3 Bd7 20.h3 Ngf6 21.Ne3 Qc7 22.b4 Rac8 23.b5 axb5 24.axb5 1/2-1/2
2015.10.24 31st ECC Open 2015
2979000 Bryn, A (2015) IM Wiersma, E (2343) 0-1
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Bxc6 bxc6 5.O-O Bg7 6.Re1 Rb8 7.c3 Nf6 8.h3 O-O 9.d4 d5 10.exd5 Qxd5 11.Rxe7 Nd7 12.Qe2 Qd6 13.Nbd2 cxd4 14.cxd4 c5 15.dxc5 Nxc5 16.Rxa7 Ba6 17.Nc4 Qd5 18.Rxa6 Nxa6 19.Bf4 Rfe8 20.Ne3 Qb5 21.Qxb5 Rxb5 22.Nc4 Rb4 23.Nfd2 Rxc4 24.Nxc4 Re4 25.Bd6 Rxc4 26.Rb1 Rc6 27.Bf4 Nb4 28.Bd2 Nxa2 29.Re1 Bxb2 30.Bh6 Rc8 31.Re2 Bc1 32.f4 Nb4 0-1
2015.10.23 31st ECC Open 2015
2978868 Gohla, U (2165) IM Wiersma, E (2343) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Be2 c6 6.Bg5 d5 7.e5 Ne4 8.Be3 Nxc3 9.bxc3 dxc4 10.Bxc4 c5 11.Ne2 Nc6 12.O-O Qc7 13.Rc1 Na5 14.Bd3 Be6 15.Qc2 Rac8 16.Nf4 Bc4 17.Qe2 Bxd3 18.Nxd3 cxd4 19.cxd4 Qd7 20.Nc5 Qf5 21.Qf3 Qxf3 22.gxf3 b6 23.Ne4 Rfd8 24.Rxc8 Rxc8 25.Rc1 Rxc1+ 26.Bxc1 f6 27.exf6 Bxf6 28.d5 Kf7 29.Kf1 Nc4 30.Ke2 e6 31.dxe6+ Kxe6 32.Nxf6 Kxf6 33.Kd3 Ne5+ 34.Ke4 Ke6 35.h3 Nc6 36.Ba3 a5 37.Bf8 b5 38.Bc5 b4 39.Bf8 a4 40.Bg7 b3 41.axb3 axb3 42.Bb2 Ne7 43.Kd3 Kf5 44.Bc1 Nd5 45.Kc4 Nf4 46.Kxb3 Nxh3 47.Kc2 Ng1 48.Kd3 Nxf3 49.Ke2 Ng5 50.Kf1 Nh3 0-1
2015.10.21 31st ECC Open 2015
2978577 IM Wiersma, E (2343) Brinkmann, Fabian (2051) 1/2-1/2
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 g5 12.Nxe5 gxf4 13.Nxd7 Bxd7 14.Qd4 Rg8 15.O-O-O Bf5 16.Ne4 Rg6 17.Nf6+ Ke7 18.Nh5 Bh6 19.gxf4 c5 20.Qd5 Bg4 21.Kb1 Bxh5 22.Qxh5 Bg7 23.Bh3 Qb6 24.Rd2 Rd8 25.Rc2 Rd4 26.Qxc5+ Qxc5 27.Rxc5 Rb6 28.Rhc1 Rxf4 29.Rc7+ Kf6 30.a5 Rb5 31.a6 bxa6 32.R7c6+ Ke7 33.Rc7+ Kf6 34.Rxa7 Kg5 35.Rg1+ Kh6 36.Rxa6+ Bf6 37.Kc1 Rxf2 38.Rf1 Rxf1+ 39.Bxf1 Kg5 40.Bg2 Bxb2+ 41.Kd2 1/2-1/2
2015.10.20 31st ECC Open 2015
2978422 Ledger, S (2075) IM Wiersma, E (2343) 0-1
1.d4 Nf6 2.Bg5 Ne4 3.Bf4 c5 4.f3 Nf6 5.d5 Nh5 6.Be3 d6 7.Bf2 g6 8.c4 Bg7 9.Nc3 O-O 10.e4 e6 11.Qd2 exd5 12.Nxd5 Be6 13.Bd3 Bxd5 14.cxd5 Nd7 15.Ne2 Ne5 16.Rb1 Nxd3+ 17.Qxd3 Qa5+ 18.Nc3 b5 19.O-O b4 20.Ne2 Qxa2 21.g4 Nf6 22.Bg3 Rfd8 23.Ra1 c4 24.Qc2 Qb3 25.Qxb3 cxb3 26.Nc1 a5 27.Nxb3 a4 28.Nd2 Ne8 29.Nc4 a3 30.bxa3 Bxa1 31.Rxa1 Ra4 32.Be1 bxa3 33.Nb6 Ra6 34.Bf2 a2 35.Bd4 Rb8 0-1
2015.10.19 31st ECC Open 2015
2978249 IM Wiersma, E (2343) GM Saric, Iv (2678) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 O-O 5.Bg2 d5 6.cxd5 exd5 7.e3 b6 8.Ne2 Bxc3+ 9.Nxc3 Ba6 10.b3 Re8 11.Ba3 Nc6 12.Qd2 Qd7 13.O-O-O Bb7 14.f3 a5 15.g4 a4 16.b4 Qd6 17.Kb1 Na7 18.Rhe1 Nd7 19.h3 Reb8 20.e4 c5 21.bxc5 bxc5 22.Ka1 dxe4 23.fxe4 Qc7 24.d5 Qe5 25.Bf1 Nc8 26.Bb5 Ncb6 27.Rf1 g6 28.Qf4 Qg7 29.e5 g5 30.Qxf7+ Qxf7 31.Rxf7 Kxf7 32.e6+ Ke7 33.exd7 Nxd7 34.Re1+ Kd8 35.Bc1 h6 36.Re6 Bxd5 37.Rxh6 Bg2 38.Bxg5+ Ke8 39.Re6+ Kf7 40.Bxd7 Bxh3 41.Re3 Bg2 42.Re2 Kg6 43.Be3 Bb7 44.Bxc5 a3 45.Bf5+ Kf7 46.Nb5 Rh8 47.Nd6+ Kg8 48.Be6+ Kg7 49.Bd4+ 1-0
2015.10.18 31st ECC Open 2015
2978153 Barta, J (2157) IM Wiersma, E (2343) 0-1
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Bxc6 bxc6 5.O-O Bg7 6.Re1 Rb8 7.c3 Nf6 8.d4 cxd4 9.cxd4 O-O 10.Nc3 d6 11.h3 Nd7 12.b3 c5 13.Bb2 Bb7 14.Na4 Bc6 15.dxc5 Bxb2 16.Nxb2 Nxc5 17.e5 Bxf3 18.Qxf3 d5 19.Qe3 Qa5 20.Nd3 Nxd3 21.Qxd3 e6 22.Rec1 Rfc8 23.Rc2 Rc5 24.Rxc5 Qxc5 25.Re1 Rc8 26.Re2 Qc1+ 27.Kh2 Qf1 28.Qd2 h5 29.Re1 Rc2 30.Qxc2 Qxe1 31.Qb2 Qe4 32.Qc3 d4 33.Qc7 Qd5 34.Qc8+ Kg7 35.f4 d3 36.Qc1 d2 37.Qd1 Qd4 38.Kh1 Qe3 39.Kh2 Qe1 40.Qf3 d1=Q 0-1
2015.09.26 Dutch League 2015-16
2995441 Mollema, Thomas (2182) IM Wiersma, E (2343) 1/2-1/2
1.f4 c5 2.Nf3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 e6 6.a4 Nge7 7.c3 O-O 8.O-O a6 9.Na3 b5 10.axb5 axb5 11.Be3 b4 12.Nc4 Rxa1 13.Qxa1 d6 14.Bf2 Qc7 15.Rc1 Bb7 16.cxb4 Ra8 17.Qb1 cxb4 18.Qc2 Ra6 19.e4 d5 20.Nce5 Qd8 21.Nxf7 Kxf7 22.Ng5+ Kg8 23.Nxe6 Qd6 24.Nc5 Ra7 25.e5 Qb8 26.Nd7 Qa8 27.Bxa7 Qxa7+ 28.Qc5 Qa2 29.Nf6+ Kh8 30.Bxd5 Qxb2 31.Be4 Bxf6 32.exf6 Qxf6 33.Rb1 Bc8 34.Qb6 Qc3 35.Qc7 Bf5 36.Bxc6 Nxc6 37.Qf7 h5 38.Qf8+ Kh7 39.Qf7+ Kh8 40.Qf8+ Kh7 41.Qf7+ 1/2-1/2
2015.07.19 Science Park Open A 2015
3030229 IM Wiersma, E (2361) CM Theulings, PP (2157) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 b6 5.e3 Bb7 6.Qc2 h6 7.Bh4 Bxc3+ 8.bxc3 g5 9.Bg3 Ne4 10.Be5 f6 11.Bd3 Nd6 12.Bxd6 cxd6 13.h4 Ke7 14.Nf3 Nc6 15.Ke2 Rc8 16.Rab1 1/2-1/2
2015.07.18 Science Park Open A 2015
3030218 Schoehuijs, E (2167) IM Wiersma, E (2361) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Nf3 c6 6.e5 Ne8 7.Bd3 d6 8.h4 c5 9.exd6 cxd4 10.dxe7 Qxe7+ 11.Ne2 Nc6 12.Kf1 Nf6 13.h5 Nxh5 14.Rxh5 gxh5 15.Nf4 Bg4 16.Nd5 Qe6 17.Nc7 Qf6 18.Nxa8 Rxa8 19.Bg5 Qe6 20.Be2 h6 21.Bf4 Rd8 22.Qd3 Bf5 23.Qd2 d3 24.Bd1 Qxc4 25.Bxh6 Bg6 26.Bb3 Qb4 27.Qg5 Qg4 28.Qd2 Qb4 29.Qg5 Qg4 30.Qd2 Be4 31.Bxg7 Bxf3 32.gxf3 Qxf3 33.Kg1 Kxg7 34.Qg5+ Kh7 35.Bd1 Rd5 36.Bxf3 Rxg5+ 37.Kf1 Re5 38.Rd1 Kh6 39.Rxd3 Kg5 40.Rd7 Rb5 1/2-1/2
2015.07.17 Science Park Open A 2015
3030201 IM Wiersma, E (2361) De Rover, YH (2316) 0-1
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.O-O a6 10.e4 c5 11.d5 c4 12.dxe6 fxe6 13.Bc2 Qc7 14.Ne2 O-O-O 15.Ned4 Qb6 16.a4 e5 17.Nf5 g6 18.Ne3 Nc5 19.Qe1 Nfxe4 20.axb5 axb5 21.Nxe5 Qe6 22.Nf3 Nd3 23.Bxd3 Rxd3 24.Qa5 Qe8 25.Nxc4 bxc4 26.Ra4 Qe6 27.Ne5 Nc5 28.Rxc4 Qxe5 29.Bf4 Qe7 30.b4 Qd7 31.Re1 Rd1 32.Rc1 Qc6 33.f3 Rxc1 34.Rxc1 Be7 35.Bg5 Bxg5 0-1
2015.07.16 Science Park Open A 2015
3030192 IM Wiersma, E (2361) In 't Veld, D (2194) 1-0
1.d4 f5 2.g3 Nf6 3.Bg2 g6 4.Nh3 Nc6 5.c4 Bg7 6.Nc3 d6 7.d5 Ne5 8.O-O O-O 9.b3 Ne4 10.Nxe4 fxe4 11.Rb1 Bf5 12.Ng5 Nf3+ 13.exf3 exf3 14.Bxf3 Bxb1 15.Ne6 Qd7 16.Nxg7 e5 17.dxe6 Qxg7 18.Bxb7 Bf5 19.e7 Qxe7 20.Bxa8 Rxa8 21.Qd5+ Kg7 22.Qxa8 Be4 23.Qxa7 Bd3 24.Qd4+ 1-0
2015.07.15 Science Park Open A 2015
3030178 De Roda Husman, J (2224) IM Wiersma, E (2361) 1/2-1/2
1.Nf3 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.d4 c6 6.Be2 d5 7.e5 Ne4 8.O-O Nxc3 9.bxc3 Nd7 10.Be3 Nb6 11.Nd2 dxc4 12.Nxc4 Nd5 13.Bd2 c5 14.Qb3 cxd4 15.cxd4 b6 16.Rfd1 Be6 17.Rac1 Qd7 18.Qa3 Rac8 19.Bf3 Rfd8 20.Ne3 Nxe3 21.Bxe3 Bc4 22.h3 e6 23.Bg5 Re8 24.Ra1 Bf8 25.Qe3 Bd5 26.h4 Bxf3 27.Qxf3 Qd5 28.Qf4 Rc2 1/2-1/2
2015.07.14 Science Park Open A 2015
3030167 Timmermans, I (2159) IM Wiersma, E (2361) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Bxc6 bxc6 5.O-O Bg7 6.Re1 Rb8 7.c3 Nf6 8.d4 cxd4 9.cxd4 O-O 10.Nc3 d6 11.h3 Nd7 12.Re2 Qa5 13.Rc2 Nb6 14.Bd2 Qa6 15.b3 f5 16.e5 dxe5 17.Nxe5 Nd7 18.Bf4 Nxe5 1/2-1/2
2015.07.13 Science Park Open A 2015
3035829 IM Wiersma, E (2361) Nguyen, Kevin (1986) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 c6 6.Be3 a6 7.c5 O-O 8.cxd6 exd6 9.Nge2 b5 10.Nf4 Nbd7 11.Be2 Nb6 12.O-O Nc4 13.Bxc4 bxc4 14.Qa4 Qb6 15.Qxc4 Nd7 16.Rfc1 Bb7 17.Na4 Qa5 18.Qb3 Rab8 19.Qa3 c5 20.b4 cxb4 21.Qb3 Rfc8 22.Nd3 Bc6 23.Nab2 Qh5 24.Nc4 Bf8 25.Bf4 Bg7 26.Nxd6 Bxd4+ 27.Kh1 Rf8 28.Rxc6 Bxa1 29.Nxf7 Rxf7 30.Bxb8 Nxb8 31.Rc7 g5 32.Qxb4 Nd7 33.Qd6 Nf6 34.Qe6 Kg7 35.e5 Ng8 36.Rxf7+ Qxf7 37.Qxa6 1/2-1/2
2015.07.11 Science Park Open A 2015
3035803 IM Wiersma, E (2361) Zimmermann, L (2108) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Be3 Qa5 9.Nd2 cxd4 10.Nc4 Qd8 11.cxd4 O-O 12.Be2 f5 13.exf5 Bxf5 14.Qb3 Be6 15.Rd1 Bd5 16.O-O Nc6 17.Qb2 Qc7 18.f4 Rad8 19.Ne5 b6 20.Rc1 Qb7 21.Bg4 Kh8 22.Rc3 Nxe5 23.dxe5 e6 24.Rd1 Rc8 25.Rcd3 Rc7 26.R3d2 Qc6 27.Rd3 Qb7 28.R3d2 Qc6 29.Rd3 Qb7 1/2-1/2
2015.04.11 Dutch League 2014-15
3063389 IM Wiersma, E (2370) FM Nieuwenhuis, P (2216) 0-1
1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 Bxf1 8.Kxf1 g6 9.Nf3 Bg7 10.g3 O-O 11.Kg2 Nbd7 12.Re1 Ng4 13.Nd2 Nge5 14.Qe2 g5 15.f4 gxf4 16.gxf4 Ng6 17.Nf3 Bh6 18.f5 Nf4+ 19.Bxf4 Bxf4 20.Kh1 Kh8 21.Rg1 Rg8 22.Qf2 Qb6 23.Qh4 Qxb2 24.Na4 Qc2 25.Qxf4 Qxa4 26.Ng5 Rg7 27.Rg2 Nf6 28.Rag1 Nxd5 29.Qg3 Nf6 30.e5 dxe5 31.Qxe5 Qc6 32.h4 h6 33.Kh2 hxg5 34.hxg5 Rh7+ 35.Kg3 Ra3+ 36.Kf4 Qf3# 0-1
2015.03.21 Dutch League 2014-15
3070444 IM Wiersma, E (2370) IM Vedder, H (2382) 1/2-1/2
1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.f3 e5 5.d5 e4 6.Qd4 c5 7.Qe3 Bg6 8.Nh3 Qe7 9.Nf4 Nbd7 10.Bd2 O-O-O 11.Nxg6 hxg6 12.f4 Re8 13.O-O-O Ng4 14.Qg3 Qh4 15.Qxh4 Rxh4 16.e3 Nf2 17.Be1 Nxd1 18.Kxd1 Rh8 19.g3 f5 20.h4 Be7 21.Rg1 a6 22.Rg2 Bf6 23.Nb1 Nb6 24.b3 Na8 25.a4 b6 26.a5 Kd7 27.axb6 Rb8 28.Ra2 Rxb6 29.Kc2 Rhb8 30.Ra3 Nc7 31.Be2 Ne8 32.Ba5 R6b7 33.Nd2 Ra8 34.Nb1 Bd8 35.Bxd8 Kxd8 36.Nc3 Nf6 37.Bd1 Kc7 38.Ra5 Kb6 39.Ra2 Rab8 40.Ra3 Ne8 41.Be2 Nf6 42.Bd1 Ka7 43.Be2 Rb6 44.Na4 Rb4 45.Nc3 Ne8 46.Bd1 Nc7 47.Be2 R4b7 48.Bd1 Rb6 49.Be2 a5 50.Rxa5+ Ra6 51.Ra4 Rxa4 52.Nxa4 Ka6 53.Nc3 Ka5 54.Kb2 Ne8 55.Bd1 Nf6 56.Ka3 Nh5 57.Bxh5 gxh5 58.Ne2 Rf8 59.Ng1 Rf6 60.Nh3 Rh6 61.Ng5 Rg6 62.b4+ cxb4+ 63.Kb3 Rf6 64.Ne6 Rf7 65.Nd4 g6 66.Nc6+ Kb6 67.Kxb4 Rb7 68.Nd4 Ra7 69.Nc2 Ra2 70.Kb3 Ra8 71.Kb4 Kc7 72.Na3 Kd7 73.Kb3 Ra6 74.Kb4 Kc7 75.Nb5+ Kb7 76.Kb3 Kc8 77.Na3 Kd7 78.Kb4 Ra8 79.Kb3 Rd8 80.Nb5 Kc8 81.Kb4 Kb7 82.Ka5 Rd7 83.Kb4 Rd8 84.Ka5 Ra8+ 85.Kb4 Rd8 1/2-1/2
2015.03.01 TCh-BEL 2014-15
3077073 IM Wiersma, E (2370) FM Decoster, F (2298) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c5 7.dxc5 dxc5 8.Bxc5 Nc6 9.Be3 Nd7 10.Nge2 Nde5 11.Qxd8 Rxd8 12.Nf4 Na5 13.Nfd5 Naxc4 14.Nxe7+ Kh8 15.Bg5 f6 16.Bc1 f5 17.Nxc8 Raxc8 18.f4 Nd3+ 1/2-1/2
2015.02.07 Dutch League 2014-15
3081954 IM Wiersma, E (2370) Wempe, Jo (2266) 1-0
1.d4 e6 2.c4 Bb4+ 3.Bd2 Qe7 4.e4 Nf6 5.Bd3 Bxd2+ 6.Nxd2 d6 7.Ngf3 e5 8.c5 dxc5 9.dxe5 Ng4 10.Bb5+ Bd7 11.Qb3 Bxb5 12.Qxb5+ c6 13.Qb3 b5 14.a4 c4 15.Qc3 Nd7 16.O-O O-O 17.Nd4 Qxe5 18.f4 b4 19.Qxc4 Qh5 20.N2f3 Ne3 21.Qxc6 Nxf1 22.Rxf1 Nb6 23.Nf5 Kh8 24.Nd6 Rad8 25.Ne5 Kg8 26.Nf5 Rd1 27.Qb5 Rxf1+ 28.Qxf1 f6 29.Ne7+ Kh8 30.g4 Qe8 31.N5g6+ Qxg6 32.Nxg6+ hxg6 33.Qh3+ Kg8 34.Qb3+ 1-0
2014.12.13 Dutch League 2014-15
3107951 FM Meissner, F (2238) IM Wiersma, E (2370) 0-1
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Bxc6 bxc6 5.d3 Bg7 6.O-O d6 7.h3 e5 8.a3 f5 9.Re1 Nf6 10.Nc3 O-O 11.b4 cxb4 12.axb4 a5 13.b5 Bd7 14.bxc6 Bxc6 15.Ba3 Re8 16.Qb1 Qd7 17.Qa2+ Kh8 18.Rab1 Rac8 19.Nd5 Bxd5 20.exd5 Qa4 21.c4 e4 22.dxe4 Nxe4 23.Qb3 Qxb3 24.Rxb3 Rxc4 25.Ng5 Rc3 26.Rxc3 Bxc3 27.Re2 Bb4 28.Bb2+ Kg8 29.Ne6 Nc5 30.Kf1 Nxe6 31.dxe6 Kf8 32.Bf6 Rc8 33.g3 a4 34.Kg2 a3 35.Kf3 Ke8 36.g4 fxg4+ 37.hxg4 Rc1 38.Ke4 Re1 39.Rxe1 Bxe1 40.f4 Bd2 41.f5 gxf5+ 42.gxf5 Bc1 43.Bg7 Ke7 44.Kd5 Bb2 45.f6+ Bxf6 46.Bxf6+ Kxf6 47.Kxd6 a2 48.e7 a1=Q 49.e8=Q Qd4+ 0-1
2014.11.22 Dutch League 2014-15
3113284 Den Hartog, Marijn (2147) IM Wiersma, E (2370) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 a6 6.g3 Nxd4 7.Qxd4 Ne7 8.Bf4 b5 9.Bg2 Bb7 10.O-O f6 11.Bd6 Nc6 12.Qd1 Bxd6 13.Qxd6 Qe7 14.Rad1 Qxd6 15.Rxd6 Ke7 16.Rfd1 Rhd8 17.f4 Na5 18.Bf1 b4 19.Na4 Bxe4 20.Nc5 Bd5 21.Rxa6 d6 22.Rxa8 Rxa8 23.Na6 Nc6 24.Bb5 Ra7 25.Bxc6 Rxa6 1/2-1/2
2014.11.01 Dutch League 2014-15
3119594 IM Wiersma, E (2370) Senders, Mischa (2380) 1/2-1/2
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Nb6 8.Nxb6 Qxb6 9.a5 Qc7 10.a6 b5 11.f3 e5 12.e4 exd4 13.Qxd4 Rd8 14.Qf2 Qe5 15.Be2 Bc5 16.Be3 Bxe3 17.Qxe3 Qe7 18.O-O O-O 19.Rfc1 Bc8 20.Nd1 Qd7 21.Nf2 Rfe8 22.Qc5 Nd5 23.Qxc6 Qxc6 24.Rxc6 Nb4 25.Rc7 Bxa6 26.Rxa7 Rd2 27.R7xa6 Rxe2 28.Rb6 Rxb2 29.Rxb5 Rd8 30.Rd1 Rc8 31.Rc5 Re8 32.Rdc1 g6 33.Rc8 Rxc8 34.Rxc8+ Kg7 35.h3 Rb1+ 36.Kh2 Rb2 37.Kg3 h5 38.h4 Nc2 39.Nd3 Ra2 40.Rc7 Nd4 41.Ne5 Ne2+ 42.Kh2 Kf6 43.Nxf7 Nf4 44.Kg3 Ne2+ 45.Kh2 Nf4 46.Nd8 Nxg2 47.Kg3 Ne1 48.f4 Ra3+ 49.Kh2 Nf3+ 50.Kh1 Ra1+ 51.Kg2 Nxh4+ 52.Kg3 Rg1+ 53.Kxh4 Rg4+ 54.Kh3 Rxf4 55.Rc4 g5 56.Nc6 1/2-1/2
2014.10.19 TCh-BEL 2014-15
3124810 IM Wiersma, E (2370) FM Henris, L (2155) 1-0
1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.a3 Nge7 6.b4 Ng6 7.Bb2 a5 8.b5 Ncxe5 9.Nxe5 Nxe5 10.Bxd4 Nxc4 11.e3 Be6 12.Qc2 Nd6 13.Bd3 Qg5 14.f4 Qh4+ 15.g3 Qh3 16.Nc3 Be7 17.e4 f6 18.f5 Bf7 19.Kf2 Rd8 20.Ne2 Rd7 21.Nf4 Qh6 22.Be3 g5 23.Ne6 Qh3 24.Bf1 Qg4 25.Nc5 Rd8 26.Be2 Qh3 27.Bf1 Qg4 28.h3 Qh5 29.Be2 Qh6 30.h4 O-O 31.hxg5 Qg7 32.g6 hxg6 33.Bh6 Nc4 34.Na4 1-0
2014.09.27 Dutch League 2014-15
3134086 Buckels, Valentin (2210) IM Wiersma, E (2370) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O c6 7.Nc3 Nbd7 8.e4 e5 9.d5 cxd5 10.cxd5 Nc5 11.Qc2 Qc7 12.Ne1 Bd7 13.b4 Na4 14.Nxa4 Qxc2 15.Nxc2 Bxa4 16.Na3 Rfc8 17.Bd2 Rc7 18.Rac1 Rac8 1/2-1/2
2014.09.16 30th ECC Open 2014
3134627 FM Kessler, L (2298) IM Wiersma, E (2370) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O exd4 8.Nxd4 Re8 9.f3 c6 10.Nc2 Na6 11.Kh1 Nc7 12.Bg5 d5 13.cxd5 cxd5 14.exd5 Ncxd5 15.Ne4 Qb6 16.Bc4 Be6 17.Nxf6+ Bxf6 18.Bxd5 Bxg5 19.Bxe6 Rxe6 20.f4 Rd8 21.Qf3 Bf6 22.f5 gxf5 23.Qxf5 Rd2 24.Rae1 Qc6 25.Ne3 Kh8 26.Rf3 Qe4 27.Qh5 Qg6 28.Qc5 Bd4 29.Qb4 Bxe3 30.Rg3 Qxg3 0-1
2014.07.31 Dutch Open 2014
3158998 IM Wiersma, E (2354) GM Horvath, Cs1 (2542) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Be6 8.Qd3 c5 9.d5 Bc8 10.Bg5 h6 11.Bh4 Qb6 12.e5 Bf5 13.Qe2 Nh5 14.O-O-O e6 15.Qc4 Qb4 16.h3 g5 17.g4 Bg6 18.a3 exd5 19.Nxd5 Qxc4+ 20.Bxc4 Nc6 21.Nxg5 hxg5 22.Bxg5 Nxe5 23.Be2 c4 24.gxh5 Bd3 25.h6 Bh8 26.Rhe1 Kh7 27.h4 f6 28.Be3 Rfd8 29.Nf4 a5 30.Nxd3 Nxd3+ 31.Bxd3+ cxd3 32.Kb1 Rd7 33.Rd2 Rd5 34.Bf4 b5 35.Re3 Rad8 36.Bc7 R8d7 37.Bxa5 f5 38.Re6 Be5 39.Bc3 1/2-1/2
2014.07.30 Dutch Open 2014
3158971 IM Kolbus, D (2303) IM Wiersma, E (2354) 1/2-1/2
1.c4 Nf6 2.Nc3 g6 3.e4 d6 4.d4 Bg7 5.f3 O-O 6.Be3 a6 7.Qd2 Nbd7 8.Bd3 c6 9.a4 e5 10.d5 Nc5 11.Bc2 cxd5 1/2-1/2
2014.07.29 Dutch Open 2014
3158939 IM Wiersma, E (2354) GM Ikonnikov, Vy (2556) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d6 6.Ne2 c5 7.O-O Nc6 8.Qc2 Ba5 9.a3 h6 10.b3 cxd4 11.Nxd4 Nxd4 12.exd4 Bb6 13.Ne2 e5 14.Bb2 Re8 15.dxe5 dxe5 16.Ng3 Bd4 17.Rad1 Qc7 18.Bxd4 exd4 19.Qb2 Rd8 20.Be2 Qf4 21.Rd3 Bg4 22.Rfd1 Bxe2 23.Nxe2 Qe5 24.Ng3 Rd7 25.Rxd4 Rad8 26.Rxd7 Qxb2 27.Rxd8+ Kh7 28.R8d3 Qxa3 29.h3 Qc5 30.Re3 b5 31.Ne4 Nxe4 32.Rxe4 Qf5 33.Red4 bxc4 34.Rxc4 Qb5 35.Rd3 a5 36.Rf3 Qd5 37.Rcf4 f6 38.Rf5 Qd1+ 39.Kh2 a4 40.bxa4 Qxa4 41.R3f4 Qd1 42.h4 h5 43.Rb5 Kg6 44.Rf3 Qd4 45.g3 Qe4 46.Rf4 Qc2 47.Rb7 Qd2 48.Rbb4 1/2-1/2
2014.07.28 Dutch Open 2014
3161320 IM Wiersma, E (2354) IM Saravanan, V1 (2320) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.Nge2 c6 8.Qb3 Nbd7 9.O-O-O Qe7 10.Qa3 exd4 11.Nxd4 Nc5 12.Be2 Bd7 13.Rd2 Rfd8 14.Rhd1 Be8 15.Nc2 Bf8 16.e5 Qxe5 17.Bxc5 Bh6 18.Bd4 Qe6 19.Kb1 Bxd2 20.Rxd2 c5 21.Bxf6 Qxf6 22.Nd5 Qh4 23.Nce3 1-0
2014.07.26 Dutch Open 2014
3161288 GM L'Ami, E (2650) IM Wiersma, E (2354) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 a6 6.f4 Nxd4 7.Qxd4 b5 8.b4 Ne7 9.a3 Bb7 10.Bd3 Rc8 11.Bb2 Nc6 12.Qe3 Nxb4 13.axb4 Bxb4 14.Qd4 Be7 15.O-O-O f6 16.Qe3 Qa5 17.Nb1 O-O 18.e5 f5 19.g4 fxg4 20.h3 g3 21.Qxg3 Bxh1 22.Rxh1 Qa4 23.f5 Qh4 24.Qxh4 Bxh4 25.Nd2 exf5 26.Nf3 Be7 27.Rg1 g6 28.h4 Kf7 29.h5 Rg8 30.hxg6+ hxg6 31.Rh1 Ke8 32.Rh7 Kd8 33.Nd4 Rc5 34.e6 Rd5 35.Be2 Re8 36.Bf3 Rd6 37.Rg7 dxe6 38.Nc6+ Kd7 39.Ne5+ Kc8 40.Bc6 Red8 41.Kb1 Bf6 42.Bb7+ Kb8 43.Rf7 Rd1+ 44.Ka2 Bxe5 45.Bxe5+ Ka7 46.Bc8+ Ka8 47.Bb7+ Ka7 48.Bc8+ Ka8 1/2-1/2
2014.07.25 Dutch Open 2014
3161265 IM Wiersma, E (2354) FM Vogel, Ja (2209) 1-0
1.d4 e6 2.c4 f5 3.g3 Nf6 4.Bg2 c6 5.Nf3 d5 6.O-O Bd6 7.Nc3 O-O 8.Qc2 Qe7 9.Bg5 h6 10.Be3 Bd7 11.Qb3 Be8 12.c5 Bxc5 13.dxc5 e5 14.Nxe5 1-0
2014.07.24 Dutch Open 2014
3161232 GM Pruijssers, R (2517) IM Wiersma, E (2354) 1-0
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Nc3 Bg7 5.O-O d6 6.e5 dxe5 7.Re1 f6 8.Bxc6+ bxc6 9.d3 Nh6 10.Be3 Nf7 11.Bxc5 f5 12.Nd2 O-O 13.f3 Qc7 14.Qe2 Rb8 15.Rab1 Be6 16.Qf2 Rb7 17.b3 Nd6 18.Na4 Bf7 19.Re2 Rd8 20.Rbe1 Nb5 21.Kh1 Nd4 22.Bxd4 Rxd4 23.Nc5 Rb5 24.c3 Rd8 25.Nc4 e4 26.d4 Rxc5 27.dxc5 Bxc3 28.Rc1 Bd4 29.Qf1 exf3 30.Qxf3 e5 31.Qg3 f4 32.Qg5 Bxc4 33.Rxc4 Be3 34.Re1 Rd5 35.Qf6 Bd4 36.g3 Qa5 37.Re2 Rxc5 38.Rxd4 Rc1+ 39.Kg2 f3+ 40.Qxf3 1-0
2014.07.23 Dutch Open 2014
3161210 Schoppen, Casper (1938) IM Wiersma, E (2354) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 d6 6.Nf3 c6 7.O-O Nbd7 8.b3 a6 9.e4 e5 10.Bb2 b5 11.Qe2 exd4 12.Nxd4 Bb7 13.Rad1 Re8 14.Qc2 b4 15.Na4 c5 16.Ne2 Bxe4 17.Bxe4 Rxe4 18.Bxf6 Nxf6 19.Nxc5 Re7 20.Nd3 Qb6 21.Nef4 g5 22.Ng2 Ne4 23.Ne3 Nc3 24.Rde1 Rae8 25.Nf5 Re2 26.Qc1 Bf6 27.h4 Nxa2 28.Qd2 Nc3 29.hxg5 R8e4 30.Rxe2 Nxe2+ 31.Kh2 Bc3 32.Qd1 d5 33.f3 Re8 34.Rf2 Nd4 35.Nh6+ Kf8 36.cxd5 Qd6 37.Nf4 Qe5 38.Qd3 Qxg5 39.Qxh7 Qg7 40.Qxg7+ Kxg7 41.Ng4 a5 42.Ra2 Nxb3 43.Nf2 Bd4 44.Ne4 Bb6 45.d6 Nd4 46.Kg2 b3 47.Ra1 Nc2 48.Rb1 Ne3+ 49.Kf2 a4 50.Ke2 Nf5 51.d7 Rd8 52.Nd5 Bd4 53.Kd3 Rxd7 54.Kc4 b2 55.Nec3 a3 56.Kb3 Bxc3 57.Nxc3 Rd3 58.Rg1 Rxf3 59.Re1 Rxg3 60.Rf1 Ne3 61.Re1 Nd5 62.Kxa3 Nxc3 63.Kxb2 Nd5 64.Re5 Nf6 0-1
2014.07.22 Dutch Open 2014
3161183 IM Wiersma, E (2354) Sparenberg, E (2119) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Be3 d6 6.f3 Nbd7 7.Nh3 a6 8.Be2 c5 9.d5 Ne8 10.O-O Rb8 11.Qd2 Nc7 12.a4 Nf6 13.Nf2 Bd7 14.a5 b5 15.axb6 Rxb6 16.Nd3 Qb8 17.Ra2 Qb7 18.e5 Nfe8 19.f4 Qc8 20.Nxc5 dxc5 21.Bxc5 Nxd5 22.Qxd5 e6 23.Qd4 Rc6 24.b4 1-0
2014.04.12 TCh-NED Meesterklasse 2013-14
3202600 IM Wiersma, E (2353) Kollen, Z (2190) 1-0
1.d4 e6 2.c4 Nf6 3.Nc3 Bb4 4.e3 Bxc3+ 5.bxc3 b6 6.Bd3 Bb7 7.f3 d6 8.Ne2 O-O 9.O-O e5 10.e4 Re8 11.Bg5 h6 12.Be3 Nc6 13.Ng3 Ne7 14.c5 bxc5 15.dxe5 dxe5 16.Bc4 Qxd1 17.Rfxd1 Nc8 18.Bb5 c6 19.Bf1 Nb6 20.a4 Rad8 21.Rxd8 Rxd8 22.Bxc5 Ra8 23.Nf5 Nbd7 24.Be3 c5 25.a5 Kf8 26.Bb5 a6 27.Bc4 Bc6 28.Rd1 Bb5 29.Ba2 Ne8 30.Bd5 Rc8 31.Rb1 Bc6 32.Bc4 Ra8 33.Rd1 Ra7 34.Rxd7 Rxd7 35.Bxc5+ Kg8 36.Ne7+ Kh7 37.Nxc6 1-0
2014.03.29 TCh-NED Meesterklasse 2013-14
3207516 IM Wiersma, E (2353) IM Borm, F (2350) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Ne2 cxd4 7.exd4 d5 8.c5 Nc6 9.Bf4 e5 10.dxe5 Ng4 11.O-O Be6 12.Na4 Ba5 13.a3 Bc7 14.b4 Bxe5 15.Bxe5 Ncxe5 16.h3 Nf6 17.Nd4 Bd7 18.Bc2 Re8 19.Re1 Ne4 20.Bxe4 dxe4 21.Rxe4 Bxa4 22.Qxa4 Nf3+ 23.gxf3 Rxe4 24.fxe4 Qxd4 25.Re1 Qc3 26.Re3 Qc1+ 27.Kg2 Rd8 28.Qxa7 g6 29.Qxb7 Rd1 30.Qb8+ Kg7 31.Qe5+ Kh6 32.Qf4+ Kg7 33.Qf3 Rg1+ 34.Kh2 Rg5 35.Qh1 Qb2 36.Qe1 Qe5+ 37.Rg3 Rxg3 38.fxg3 Qb2+ 39.Kh1 Qxa3 40.c6 Qa7 41.Qc3+ f6 42.Kg2 Qa2+ 43.Kf3 Qb1 44.c7 1-0
2014.03.08 TCh-NED Meesterklasse 2013-14
3216258 Houben, Jaap (2279) IM Wiersma, E (2353) 1-0
1.c4 Nf6 2.g3 g6 3.Bg2 Bg7 4.Nc3 O-O 5.d3 d6 6.e4 c5 7.Nge2 Nc6 8.O-O a6 9.h3 Rb8 10.a4 Ne8 11.Bg5 Nc7 12.Qd2 b5 13.axb5 axb5 14.cxb5 Nxb5 15.Bh6 Bxh6 16.Qxh6 Nbd4 17.Nxd4 cxd4 18.Na4 Rb3 19.Rfd1 Bd7 20.Qg5 Ne5 21.f4 Nxd3 22.Qd5 Bxa4 23.Rxa4 Qb6 24.Ra8 Rxa8 25.Qxa8+ Kg7 26.Qe8 Nxb2 27.Ra1 d3+ 28.Kh2 Qb8 29.Qxe7 d2 30.f5 d1=Q 31.f6+ Kg8 32.Ra7 Kh8 33.Qxf7 Qg8 34.Ra8 Qd5 35.Rxg8# 1-0
2014.02.08 TCh-NED Meesterklasse 2013-14
3223061 IM Wiersma, E (2353) IM Vedder, H (2372) 1/2-1/2
1.d4 e6 2.c4 Bb4+ 3.Bd2 Bxd2+ 4.Qxd2 d5 5.Nc3 Nf6 6.e3 O-O 7.cxd5 Nxd5 8.Nf3 Nc6 9.Rc1 Re8 10.e4 Nxc3 11.Qxc3 Qe7 12.Bb5 Bd7 13.O-O Ne5 14.Nxe5 Bxb5 15.Rfe1 Rac8 16.a4 Bxa4 17.Qa5 f6 18.Qxa4 1/2-1/2
2014.01.04 TCh-NED Meesterklasse 2013-14
3230788 IM Wiersma, E (2353) Mundorf, J (2194) 1-0
1.d4 e6 2.c4 Bb4+ 3.Bd2 a5 4.Nc3 Nf6 5.e4 d5 6.e5 Ne4 7.Nxe4 dxe4 8.Ne2 c5 9.dxc5 Na6 10.Nc3 Qd4 11.Qh5 O-O 12.a3 Bxc3 13.Bxc3 Qxc5 14.Be2 Bd7 15.Rd1 Bc6 16.Rd6 a4 17.O-O Rad8 18.Rfd1 Rxd6 19.Rxd6 Qb6 20.Qg5 Qc7 21.Qe3 f5 22.Qd4 Qe7 23.Ba5 Qg5 24.Rd8 Rxd8 25.Bxd8 Qc1+ 26.Bf1 e3 27.fxe3 h6 28.Ba5 Kh7 29.Bd2 Qd1 30.Bc3 Qc1 31.Qd2 Qb1 32.Bd4 Be4 33.h3 Nb8 34.Kf2 Nc6 35.Bc3 Qc2 36.Qxc2 Bxc2 37.Ke2 h5 38.h4 g5 39.hxg5 Kg6 40.g3 Kxg5 41.Kd2 Be4 42.Be2 Nb8 43.Bb4 Nd7 44.Be7+ Kg6 45.Bd6 Bc6 46.Kc3 Kh6 47.Kd4 Kg6 48.c5 Bd5 49.Bb5 Bc6 50.Bc4 Kf7 51.Be2 Kg6 52.Bd1 Bb5 53.e4 fxe4 54.Kxe4 Bc6+ 55.Kf4 Kh6 56.Bc2 Bb5 57.b3 axb3 58.Bxb3 b6 59.cxb6 Nxb6 60.Bxe6 Nc4 61.Bf8+ Kg6 62.Bd5 1-0
2013.12.07 TCh-NED Meesterklasse 2013-14
3243986 FM Schoorl, R (2340) IM Wiersma, E (2353) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.Re1 Nf6 6.c3 O-O 7.h3 a6 8.Bxc6 dxc6 9.d4 cxd4 10.cxd4 c5 11.d5 b5 12.a4 Bb7 13.Qc2 e6 14.Qxc5 Nxe4 15.Rxe4 Rc8 16.Qe3 exd5 17.Rd4 Re8 18.Qd2 Bxd4 19.Nxd4 Qb6 20.Nc3 Rc4 21.Nce2 bxa4 22.Qd1 Qb4 23.Be3 Ba8 24.Nf4 Re4 25.Nfe2 a5 26.Qd3 Bb7 27.f3 Qxb2 28.Rd1 Re8 29.Rd2 Qa1+ 30.Kf2 Rec8 31.Bh6 Re8 32.Rd1 Qa2 33.Rd2 Qa1 34.Rd1 Qa2 35.Rd2 Qa1 36.Rd1 Qa2 1/2-1/2
2013.11.02 TCh-NED Meesterklasse 2013-14
3248016 IM Wiersma, E (2353) WGM Paulet, I (2217) 0-1
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bxc3+ 7.Nxc3 b6 8.g4 Bb7 9.g5 dxc4 10.Rg1 Ne4 11.Nxe4 Bxe4 12.Bxc4 c5 13.dxc5 Nc6 14.Qxd8 Rfxd8 15.Bd2 Ne5 16.Be2 bxc5 17.Rc1 c4 18.Rg3 Nd3+ 19.Bxd3 Bxd3 20.Bc3 Rd5 21.f3 Rb8 22.e4 Rdb5 23.Rg2 a6 24.Kf2 Rxb2+ 25.Bxb2 Rxb2+ 26.Kg3 Rb3 27.Ra2 g6 28.Kf4 c3 29.Ke5 Bb1 30.Rf2 Kg7 31.a4 c2 32.f4 Ra3 33.f5 gxf5 34.exf5 exf5 35.Rf4 Kg6 36.h4 Re3+ 37.Kd4 Rh3 38.Kc5 Rb3 39.Rd4 Kh5 40.Rh1 Rc3+ 41.Rc4 Rxc4+ 42.Kxc4 Kg4 43.Kc3 f4 44.Kd2 Kg3 45.Re1 f3 46.Re7 Ba2 0-1
2013.10.13 TCh-BEL 2013-14
3261165 IM Wiersma, E (2353) IM Boidman, Y (2398) 1-0
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.d5 c4 11.dxe6 cxd3 12.exd7+ Qxd7 13.O-O Bb7 14.Re1 Be7 15.e5 Nd5 16.Ne4 O-O 17.Qxd3 Qg4 18.Nfg5 Bxg5 19.Bxg5 h6 20.h3 Qh5 21.Bd2 Qxe5 22.Ng5 Qxe1+ 23.Rxe1 hxg5 24.Bxg5 Rfe8 25.Rxe8+ Rxe8 26.Qd4 f6 27.Bd2 Kf7 28.h4 Re6 29.Qa7 Re7 30.Qb8 Rd7 31.h5 Ne7 32.Bb4 Be4 33.a3 Rd1+ 34.Kh2 Rd5 35.f3 Rxh5+ 36.Kg1 Bb1 37.Qb7 Re5 38.Qxa6 Nf5 39.Bc3 Rd5 40.Qb7+ Ke6 41.Bb4 Rd1+ 42.Kh2 Bd3 43.Qc6+ Kf7 44.Qd5+ 1-0
2013.09.21 TCh-NED Meesterklasse 2013-14
3247945 Besseling, M (2195) IM Wiersma, E (2353) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nbd7 7.O-O c6 8.e4 e5 9.h3 Qa5 10.Qc2 exd4 11.Nxd4 Ne5 12.b3 c5 13.Nde2 a6 14.Rd1 Rd8 15.Bb2 Be6 16.Rd2 Nc6 17.Rad1 Ne8 18.Qb1 Rac8 19.Nd5 b5 20.Bxg7 Kxg7 21.Qb2+ f6 22.cxb5 axb5 23.Ndf4 Bf7 24.h4 Ne5 25.Rc2 Ra8 26.Nd3 Nxd3 1/2-1/2
2013.07.21 7th LCT 2013
3295333 Wilschut, P (2232) IM Wiersma, E (2374) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Bxc6 bxc6 5.O-O Bg7 6.Re1 Nf6 7.e5 Nd5 8.c4 Nc7 9.d4 cxd4 10.Qxd4 Ne6 11.Qh4 d6 12.exd6 Qxd6 13.Nc3 Rb8 14.Ng5 Qd3 15.Nce4 h6 16.Nxe6 Bxe6 17.Nc5 Qxc4 1/2-1/2
2013.07.20 7th LCT 2013
3295298 IM Wiersma, E (2374) Van Halderen, H (2071) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bd6 7.Ng3 c5 8.dxc5 Bxc5 9.b4 Be7 10.Bb2 a5 11.b5 b6 12.cxd5 exd5 13.Be2 Ra7 14.O-O Be6 15.Bf3 Rd7 16.Na4 Ne4 17.Nh5 f6 18.Nf4 Bf7 19.Qc2 Rc7 20.Qd1 Rd7 21.Qd3 Re8 22.Rfd1 Bd6 23.Bg4 Bxf4 24.exf4 Rde7 25.Bd4 Rb7 26.Rac1 Bg6 27.Qh3 Nd6 28.Qb3 Nc4 29.Nc3 Rbe7 30.Nxd5 Qxd5 31.Be3 Qb7 32.Qxc4+ Bf7 33.Qd4 Bb3 34.Rd3 a4 35.h3 Re4 36.Qxb6 Qe7 37.Qc5 Qf7 38.Bf3 Nd7 39.Qd6 R4e7 40.b6 Qg6 41.b7 f5 42.Qxg6 hxg6 43.Bc6 Be6 44.Rcd1 1-0
2013.07.19 7th LCT 2013
3295260 Ratsma, Midas (2036) IM Wiersma, E (2374) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nbd7 7.O-O e5 8.e4 c6 9.b3 a6 10.Bb2 b5 11.Qe2 exd4 12.Nxd4 Bb7 13.Rad1 Re8 14.Rfe1 d5 15.cxd5 cxd5 16.Qc2 Qb6 17.Re2 dxe4 18.Nxe4 Bxe4 19.Bxe4 Rac8 20.Nc6 Bf8 21.Rc1 Re6 22.Bg2 Rxe2 23.Qxe2 1/2-1/2
2013.07.19 7th LCT 2013
3297074 Ratsma, Midas (2036) IM Wiersma, E (2374) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nbd7 7.O-O e5 8.e4 c6 9.b3 a6 10.Bb2 b5 11.Qe2 exd4 12.Nxd4 Bb7 13.Rad1 Re8 14.Rfe1 d5 15.cxd5 cxd5 16.Qc2 Qb6 17.Re2 dxe4 18.Nxe4 Bxe4 19.Bxe4 Rac8 20.Nc6 Bf8 21.Rc1 Re6 22.Bg2 Rxe2 1/2-1/2
2013.07.19 7th LCT 2013
3295224 IM Wiersma, E (2374) Partenheimer, A (2157) 1/2-1/2
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 7.f3 Bb4 8.Nxc4 O-O 9.Kf2 c5 10.Na2 Nc6 11.Nxb4 Nxb4 12.e4 Bg6 13.Be3 cxd4 14.Bxd4 Nc6 15.Bc3 Qe7 16.Qd6 Rfd8 17.Qxe7 Nxe7 18.Be2 Rac8 19.Rhd1 Ne8 20.Na5 b6 21.Nb7 Rxd1 22.Rxd1 f6 23.Nd8 Bf7 24.Bb4 Rc7 25.Bb5 e5 26.Nxf7 Kxf7 27.Rd8 Nc6 28.Bxc6 Rxc6 29.Rd7+ Kg6 30.Rxa7 Rc2+ 31.Kg3 Rxb2 32.Bf8 Rc2 33.Re7 Rc8 34.Rb7 Rc6 35.Re7 Rc8 36.f4 exf4+ 37.Kxf4 h5 38.Rb7 Rc6 1/2-1/2
2013.07.16 7th LCT 2013
3295194 FM Asefi, Z (2078) IM Wiersma, E (2374) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O exd4 8.Nxd4 Re8 9.f3 Nc6 10.Nxc6 bxc6 11.Bg5 h6 12.Bh4 Rb8 13.Qc2 g5 14.Bf2 c5 15.Rfd1 Qe7 16.Rab1 Be6 17.Bf1 Nh5 18.Kh1 Be5 19.Nd5 Bxd5 20.exd5 Qf6 21.b4 Rxb4 22.Rxb4 cxb4 23.Bxa7 Qf4 24.Bg1 Qh4 25.g4 Ng3+ 26.Kg2 Nxf1 27.Rxf1 h5 28.Qf5 Bxh2 29.Bd4 Bf4 0-1
2013.07.15 7th LCT 2013
3295174 IM Wiersma, E (2374) Den Hartog, Marijn (1916) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6 8.Qd2 Rb8 9.Rb1 b5 10.cxb5 axb5 11.b4 Ba6 12.d5 Ne5 13.Nd4 Qd7 14.a4 Nc4 15.Bxc4 bxc4 16.O-O e6 17.Nc6 Ra8 18.b5 Bb7 19.Rb4 exd5 20.exd5 Bxc6 21.bxc6 Qf5 22.Rxc4 Rfe8 23.Rd1 Re7 24.Rf4 Bh6 25.Rxf5 Bxe3+ 26.Qxe3 Rxe3 27.Rxf6 Rxc3 28.Rf4 Rc2 29.Rb1 Ra5 30.Rb5 Rxb5 31.axb5 Rb2 32.Ra4 1/2-1/2
2013.07.14 7th LCT 2013
3295153 Kouwenhoven, Arjen (2004) IM Wiersma, E (2374) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nb5 d6 6.Bf4 e5 7.Be3 Nf6 8.N5c3 Be6 9.Be2 Be7 10.O-O O-O 11.Bf3 Qa5 12.Nd5 Bxd5 13.exd5 e4 14.dxc6 exf3 15.Qxf3 bxc6 16.Nd2 Rab8 17.Nb3 Qa4 18.Rfe1 Nd5 19.Bd2 Bf6 20.Re4 Qa6 21.c4 Bxb2 22.Rae1 Nf6 23.Rh4 Rfe8 24.Rd1 Qxa2 25.Nd4 Qxc4 26.Nf5 Qd5 27.Qxd5 Nxd5 28.Nxd6 Red8 29.Nf5 Nc3 30.Ne7+ Kh8 0-1
2013.07.13 7th LCT 2013
3295109 IM Wiersma, E (2374) Sparreboom, W (1954) 0-1
1.d4 d5 2.c4 dxc4 3.e4 e5 4.Nf3 exd4 5.Bxc4 Nc6 6.O-O Be6 7.Bb5 Bc5 8.b4 Bb6 9.a4 a6 10.Bxc6+ bxc6 11.a5 Ba7 12.Bb2 Nf6 13.Qd3 O-O 14.Nbd2 Qe7 15.Rfc1 Rfd8 16.Ba3 Bg4 17.Rxc6 Bxf3 18.Qxf3 d3 19.Bb2 Ne8 20.Rc4 Rab8 21.Bc3 Nd6 22.Qg4 g6 23.Rc6 h5 24.Qf4 Ne8 25.Nf3 Rd6 26.Qh6 Nf6 27.Rxd6 cxd6 28.Qg5 Bxf2+ 29.Kf1 Qxe4 30.Kxf2 Qe2+ 31.Kg1 Ne4 32.Qc1 Rc8 33.Bd4 Rxc1+ 34.Rxc1 f6 35.Re1 Qxe1+ 0-1
2013.07.12 7th LCT 2013
3295092 WFM Chevannes, S (2136) IM Wiersma, E (2374) 1/2-1/2
1.d4 Nf6 2.Nf3 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 Nh5 6.Bg5 h6 7.Bh4 g5 8.Ne5 Nf6 9.Bg3 Bf5 10.Bd3 Bxd3 11.Qxd3 c6 12.h3 Nbd7 13.h4 Nh5 14.Bh2 e6 15.g4 Nhf6 16.Bg3 Qa5 17.Nxd7 Kxd7 18.f3 Rag8 1/2-1/2
2013.02.09 73rd Noteboom Mem
3355519 Kors, Hans IM Wiersma, E (2366) 1-0
1.e4 c5 2.a3 g6 3.h4 Nf6 4.Nc3 Nc6 5.h5 Nxh5 6.Rxh5 gxh5 7.Qxh5 e6 8.Nf3 a6 9.d3 Qf6 10.Be3 d6 11.O-O-O Bd7 12.Kb1 Ne5 13.d4 Nxf3 14.gxf3 Qg6 15.Qh2 cxd4 16.Bxd4 Rg8 17.f4 Qh6 18.Bh3 Rg4 19.f5 Rh4 20.Rd3 Rc8 21.b3 Rxc3 22.Bxc3 exf5 23.e5 Qf4 24.Qg2 Bc6 25.Qg8 Rh6 26.Bd2 1-0
2013.02.08 73rd Noteboom Mem
3355492 IM Wiersma, E (2366) Ratsma, Rosa (1821) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.Nge2 Nc6 8.d5 Ne7 9.g4 Ne8 10.Qc2 f5 11.h3 Kh8 12.O-O-O Ng8 13.Kb1 Bd7 14.Bg2 a6 15.exf5 gxf5 16.f4 Bh6 17.Bc1 Qe7 18.Rde1 fxg4 19.hxg4 Bxg4 20.fxe5 Bxc1 21.Nxc1 Bf5 22.Be4 Qxe5 23.Nd3 Bxe4 24.Nxe4 Qf5 25.Qc3+ Ng7 26.Rhg1 Nf6 27.Ng5 Rae8 28.Rxe8 Nfxe8 29.Ne6 Rg8 30.Rg5 Qf6 31.Qxf6 1/2-1/2
2013.01.13 TCh-BEL 2012-13
3364746 Roos, Dav (2122) IM Wiersma, E (2373) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Qc7 6.Be2 a6 7.Be3 b5 8.Nxc6 dxc6 9.f4 Bb7 10.O-O Be7 11.Qe1 Nf6 12.a3 c5 13.e5 Nd7 14.Qg3 O-O 15.Bf3 c4 16.Bxb7 Qxb7 17.Kh1 Nc5 18.f5 exf5 19.Bh6 Ne6 20.Rxf5 a5 21.a4 b4 22.Nb5 Qe4 23.Raf1 Rad8 24.Nd6 Qxc2 25.h3 Bxd6 26.exd6 Qxb2 27.Bg5 Nxg5 28.Qxg5 Rxd6 29.Qe7 Rf6 30.Rxf6 gxf6 31.Rxf6 Qc1+ 32.Kh2 Qg5 33.Qd6 c3 34.Rf1 c2 35.Qc7 b3 36.Qc3 Rb8 37.Qc7 Rf8 38.Qc3 h6 39.g3 Rd8 40.Qf3 c1=Q 41.Qxf7+ Kh8 42.Rxc1 Qd2+ 0-1
2012.10.27 16th Unive Open
3391366 FM Heemskerk, W (2254) IM Wiersma, E (2367) 1/2-1/2
1.c4 Nf6 2.g3 g6 3.Bg2 Bg7 4.Nc3 O-O 5.e4 d6 6.Nge2 c5 7.d3 Nc6 8.O-O a6 9.h3 Rb8 10.a4 Ne8 11.Be3 Nc7 12.d4 cxd4 13.Nxd4 Ne6 14.Nde2 Nc5 15.Rb1 f5 16.Kh1 Ne5 17.b3 fxe4 18.Nxe4 Bf5 1/2-1/2
2012.10.26 16th Unive Open
3391324 IM Wiersma, E (2367) GM Kasparov, S (2476) 0-1
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 5.e3 b5 6.b3 Bf5 7.Ne5 h6 8.g4 Bh7 9.Bg2 e6 10.O-O Bd6 11.Bb2 O-O 12.Rc1 Ra7 13.Qe2 Re8 14.Rfd1 Qe7 15.h3 Rd8 16.a4 b4 17.Na2 a5 18.cxd5 cxd5 19.Qb5 Ne8 20.Bf1 h5 21.Kg2 hxg4 22.hxg4 f6 23.Nc6 Nxc6 24.Rxc6 f5 25.Be2 fxg4 26.Bxg4 Qg5 27.f3 Bf5 28.Qe2 Nf6 0-1
2012.10.25 16th Unive Open
3391293 WIM Padurariu, I (2236) IM Wiersma, E (2367) 0-1
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Nxc6 bxc6 7.Be3 d5 8.Be2 Rb8 9.Rb1 Nf6 10.e5 Nd7 11.f4 c5 12.Bf2 Bb7 13.Bf3 g5 14.f5 Nxe5 15.fxe6 fxe6 16.Bh5+ Ng6 17.Qd3 Kf7 18.O-O Kg7 19.Bg3 Bd6 20.Bxd6 Qxd6 21.Ne4 Qb6 22.Rf7+ Kxf7 23.Qf3+ Ke7 24.Qf6+ Kd7 25.Qg7+ Kc6 26.Nxg5 Qc7 27.Qf7 Qe5 0-1
2012.10.24 16th Unive Open
3391252 IM Wiersma, E (2367) Lindgren, P (2265) 1/2-1/2
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bd6 9.O-O O-O 10.Qc2 Bb7 11.e4 e5 12.h3 exd4 13.Nxd4 Nc5 14.Rd1 Nxd3 15.Rxd3 Qb8 16.Nf5 Be5 17.f3 c5 18.Be3 c4 19.Rd2 a6 20.Bc5 1/2-1/2
2012.10.23 16th Unive Open
3391205 GM Van Kampen, R (2570) IM Wiersma, E (2367) 1-0
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Ndb5 Bc5 7.Bf4 O-O 8.Bc7 Qe7 9.Bd6 Bxd6 10.Qxd6 Qd8 11.Nc7 Rb8 12.Be2 b5 13.e5 b4 14.exf6 bxc3 15.fxg7 Kxg7 16.b3 Qf6 17.Rd1 Nb4 18.O-O Rb6 19.Qc5 Bb7 20.Rxd7 Rc8 21.Bh5 Nd5 22.Nxd5 exd5 23.Qe3 Rf8 24.Re1 Bc8 25.Qg3+ Kh8 26.Rxf7 1-0
2012.10.22 16th Unive Open
3391176 IM Wiersma, E (2367) Lee, Ka (2143) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bd6 7.Ng3 c5 8.dxc5 Bxc5 9.b4 Be7 10.Bb2 dxc4 11.Bxc4 a5 12.b5 a4 13.Qc2 Qa5 14.O-O Nbd7 15.Nce4 b6 16.Rfd1 Ne8 17.Nh5 Qa7 18.Bxg7 Nxg7 19.Rxd7 Nxh5 20.Rxa7 Rxa7 21.Nc3 Bf6 22.Rb1 Bxc3 23.Qxc3 Rc7 24.Qd4 Rc5 25.Be2 Ng7 26.Qxa4 Rc7 27.Qd4 Bb7 28.Qxb6 Rfc8 29.h3 Nf5 30.Rb4 Kf8 31.Rc4 Rxc4 32.Bxc4 Be4 33.Bxe6 fxe6 34.Qxe6 Re8 35.Qf6+ Kg8 36.f3 Bd3 37.e4 Ng7 38.Qd4 1-0
2012.10.21 16th Unive Open
3391128 IM Valdes, Le (2414) IM Wiersma, E (2367) 1-0
1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.Nc3 c6 7.Rb1 a6 8.b4 b5 9.d3 bxc4 10.dxc4 Bf5 11.Rb3 e5 12.Nd2 Be6 13.Ra3 Ra7 14.Qc2 Rb7 15.Rb3 d5 16.Na4 Nbd7 17.e4 a5 18.Ba3 axb4 19.Bxb4 Re8 20.Be7 Qa8 21.Rxb7 Qxb7 22.Rb1 Qa7 23.Bxf6 Nxf6 24.Nc3 dxc4 25.Bf1 Bh6 26.Nxc4 Qc5 27.Rd1 Ra8 28.Nb1 Bg4 29.Be2 Ra4 30.Qxa4 Bxe2 31.Rd8+ Kg7 32.Qa3 Qxa3 33.Nbxa3 Bc1 34.Ra8 Nxe4 35.Nxe5 Kf6 36.Nac4 Kf5 37.Ra5 Ke6 38.f3 Nc3 39.Rc5 Nxa2 40.Kf2 Bxc4 41.Nxc4 Nb4 42.Ke2 Bh6 43.Re5+ Kd7 44.Re4 Nd5 45.Rh4 1-0
2012.10.20 16th Unive Open
3393171 IM Wiersma, E (2367) Van Osch, Mees (2083) 1-0
1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nc3 Qe7 7.Qd5 f6 8.exf6 Nxf6 9.Qd3 Ne4 10.g3 d6 11.Bg2 O-O 12.O-O Nxc3 13.bxc3 Bc5 14.Nd4 Ne5 15.Qe4 c6 16.Rab1 Qc7 17.Rbd1 Bd7 18.Qc2 Rae8 19.Bxe5 dxe5 20.Nb3 Be7 21.Be4 g6 22.Qd3 Be6 23.Bxg6 Rd8 24.Qe4 Bg5 25.Rxd8 Bxd8 26.Bh5 Qg7 27.Bf3 Bb6 28.c5 Bc7 29.Qe3 a5 30.Nc1 Rf4 31.Be4 Bd5 32.Bxd5+ cxd5 33.Rd1 d4 34.cxd4 exd4 35.Qe6+ Kh8 36.Nd3 Rf8 37.Rb1 Rf6 38.Qd5 Bb8 39.Qxd4 1-0
2012.10.19 16th Unive Open
3393136 Klomp, R (2119) IM Wiersma, E (2367) 0-1
1.c4 Nf6 2.Nc3 g6 3.g3 Bg7 4.Bg2 O-O 5.e4 d6 6.Nge2 Nc6 7.d4 e5 8.d5 Nd4 9.O-O c5 10.dxc6 bxc6 11.Nxd4 exd4 12.Qxd4 Ba6 13.Rd1 Qa5 14.Qd3 Ng4 15.Bf4 Rfd8 16.Rac1 Ne5 17.Qc2 Bxc4 18.b3 Be6 19.Ne2 Rac8 20.Nd4 Bg4 21.f3 Bd7 22.Be3 c5 23.Ne2 c4 24.Nf4 cxb3 25.Qxb3 Ba4 26.Rxc8 Bxb3 27.Rxd8+ Qxd8 28.axb3 Qb8 29.Nd5 Qxb3 30.Rc1 h6 31.Bxa7 Nxf3+ 32.Bxf3 Qxf3 33.Re1 Be5 34.Bf2 Kg7 35.Re3 Qd1+ 36.Kg2 Qc2 37.Nf4 Qc6 38.Nd5 Qa6 39.Nf4 f5 40.Ne2 fxe4 41.Kf1 Qa4 0-1
2012.07.22 2nd Science Park Open A
3438419 IM Van Oosterom, C (2385) IM Wiersma, E (2375) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.c3 Nf6 4.e5 Nd5 5.d4 cxd4 6.cxd4 d6 7.Bc4 Be7 8.O-O O-O 9.Re1 dxe5 10.dxe5 Nb6 11.Bd3 Na6 12.Qe2 Nc5 13.Bc2 Nd5 14.Bd2 Bd7 15.Na3 Qb6 16.Nc4 Qa6 17.Ng5 h6 18.Ne4 Rfc8 19.b3 Nxe4 20.Qxe4 f5 21.exf6 Nxf6 22.Qe2 b5 23.Ne3 Qb7 24.Bd3 Ne4 25.Ng4 Nxd2 26.Qxd2 Rc5 27.Ne5 Rd8 28.Rad1 Be8 29.Qe3 Qb6 30.Qe4 Bf6 31.Ng4 Rf5 32.Qe2 Rf4 33.g3 Rfd4 34.Nxf6+ gxf6 35.Bc2 Rxd1 36.Qg4+ Kf8 37.Bxd1 Rd2 38.Qf4 Qd4 39.Qxd4 Rxd4 40.Bf3 Ke7 41.Rc1 a5 42.Bc6 Bxc6 43.Rxc6 Rd2 44.Rc5 Rxa2 45.Rxb5 1/2-1/2
2012.07.21 2nd Science Park Open A
3438392 IM Wiersma, E (2375) Zult, D (2252) 1/2-1/2
1.d4 d5 2.c4 dxc4 3.e4 e5 4.Nf3 exd4 5.Bxc4 Nc6 6.O-O Be6 7.Bb5 Bc5 8.b4 Bb6 9.a4 a6 10.Bxc6+ bxc6 11.a5 Ba7 12.Bb2 Bg4 13.Nbd2 Rb8 14.Qc2 Qd6 15.Nc4 Qf6 16.Nfe5 h5 17.Ra3 Ne7 18.h3 Rb5 19.Qd3 Be6 20.f4 Rxb4 21.f5 Bxc4 22.Nxc4 Rxc4 23.Qxc4 d3+ 24.Kh1 Qxb2 25.Rxd3 Qb5 26.Rfd1 O-O 27.Qxb5 cxb5 28.Rd7 Re8 29.Rxc7 Bb8 30.Rxe7 Rxe7 31.Rd8+ Kh7 32.Rxb8 Rxe4 33.Rb6 Rf4 34.Rxa6 Rxf5 35.Rb6 h4 36.a6 g6 37.Kg1 Rc5 38.Rf6 Rc7 39.Rf4 Kg7 40.Rf6 Rc5 1/2-1/2
2012.07.20 2nd Science Park Open A
3438362 Vroombout, E (2241) IM Wiersma, E (2375) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Nxc6 bxc6 7.e5 Nd5 8.Ne4 Qc7 9.f4 Qb6 10.c4 Ne3 11.Qd3 Nf5 12.g4 Nd4 13.Bg2 h5 14.g5 h4 15.Rf1 Ba6 16.Rf2 O-O-O 17.Be3 Qb4+ 18.Rd2 Nf5 19.a3 Qxc4 20.Qxc4 Bxc4 21.Bxa7 h3 22.Bf1 Bxf1 23.Kxf1 Rh4 24.Rf2 Kb7 25.Bc5 Bxc5 26.Nxc5+ Kb6 27.Rc1 Ne3+ 28.Ke2 Nd5 29.Nd3 Ra8 30.Kf3 f5 31.exf6 gxf6 32.Kg3 Rh5 33.Kg4 Rah8 34.Rg1 fxg5 35.fxg5 Ne3+ 36.Kf3 Ng2 37.Nf4 Rf8 38.Kg4 Rh4+ 39.Kg3 Rhxf4 40.Rxf4 Nxf4 0-1
2012.07.19 2nd Science Park Open A
3438325 IM Wiersma, E (2375) Kuling, L (2244) 1/2-1/2
1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nc3 Qe7 7.Qd5 f6 8.exf6 Bxc3+ 9.bxc3 Nxf6 10.Qd3 d6 11.g3 O-O 12.Bg2 Bg4 13.O-O Rae8 14.Rab1 b6 15.Rfe1 Kh8 16.Nd4 Ne5 17.Bxe5 dxe5 18.Nf5 Bxf5 19.Qxf5 Qc5 20.e3 Qxc4 21.Qc2 Rd8 1/2-1/2
2012.07.18 2nd Science Park Open A
3438290 Plukkel, S (2274) IM Wiersma, E (2375) 1-0
1.e4 c5 2.Nf3 Nc6 3.Nc3 e6 4.d4 cxd4 5.Nxd4 Nf6 6.Be2 Bb4 7.O-O Bxc3 8.bxc3 Nxe4 9.Nxc6 Qf6 10.Nd4 Nxc3 11.Qe1 Qxd4 12.Bf3 Ne2+ 13.Bxe2 Qxa1 14.Qb4 Qe5 15.Ba3 d6 16.Bb5+ Ke7 17.Re1 a5 18.Qd2 Qxb5 19.Qxd6+ Kf6 20.Bc5 h6 21.c4 Qxc4 22.Bd4+ Qxd4 23.Qxd4+ Kg6 24.Re3 Kh7 25.Qd3+ f5 26.Qd4 Ra6 27.Rc3 e5 28.Qxe5 Rd8 29.h4 Be6 30.Rc7 Rd7 31.Rxd7 Bxd7 32.Qc7 Bc6 33.Qc8 Be4 34.f3 Rc6 35.Qd8 b6 36.fxe4 fxe4 37.Qd5 Rg6 38.Qxe4 h5 39.g4 1-0
2012.07.17 2nd Science Park Open A
3438237 Hovenga, A (2247) IM Wiersma, E (2375) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O exd4 8.Nxd4 Re8 9.f3 c6 10.Kh1 Nbd7 11.Bg5 h6 12.Bh4 Ne5 13.f4 Neg4 14.Qd3 Nxe4 15.Nxe4 Qxh4 16.Bxg4 Bxg4 17.Nxd6 Re7 18.Nf3 Qh5 19.Rad1 Bxb2 20.Rb1 Bg7 21.Rxb7 Rxb7 22.Nxb7 Qf5 23.Qe3 Qc2 24.Ne5 Bxe5 25.fxe5 Qxc4 26.Rc1 Qd5 27.Nd6 Rb8 28.h3 Be6 29.Rf1 Rb2 30.Rf3 Qd2 31.Qg1 Bd5 32.Rg3 Qf4 33.Qe1 Rf2 34.Qc3 Rf1+ 35.Kh2 Bxg2 36.Qd3 Bd5 0-1
2012.07.17 2nd Science Park Open A
3438257 IM Wiersma, E (2375) GM Greenfeld, A (2556) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Nc6 8.Be2 Bg4 9.d5 Na5 10.Qa4 Bxf3 11.Bxf3 c6 12.O-O b5 13.Qb4 a6 14.Bg5 Re8 15.e5 Nxd5 16.Nxd5 cxd5 17.Rad1 Nc6 18.Qe1 Nxe5 19.Bxd5 Qb8 20.Bxa8 Qxa8 21.Qe2 Nc4 22.b3 Nb6 23.Qd3 e6 24.Qd8 Nd5 25.Qxa8 Rxa8 26.Rc1 Bc3 27.Rfd1 b4 28.Kf1 a5 29.a4 1/2-1/2
2012.07.16 2nd Science Park Open A
3441839 Hovenga, A (2247) IM Wiersma, E (2375) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O exd4 8.Nxd4 Re8 9.f3 c6 10.Kh1 Nbd7 11.Bg5 h6 12.Bh4 Ne5 13.f4 Neg4 14.Qd3 Nxe4 15.Nxe4 Qxh4 16.Bxg4 Bxg4 17.Nxd6 Re7 18.Nf3 Qh5 19.Rad1 Bxb2 20.Rb1 Bg7 21.Rxb7 Rxb7 22.Nxb7 Qf5 23.Qe3 Qc2 24.Ne5 Bxe5 25.fxe5 Qxc4 26.Rc1 Qd5 27.Nd6 Rb8 28.h3 Be6 29.Rf1 Rb2 30.Rf3 Qd2 31.Qg1 Bd5 32.Rg3 Qf4 33.Qe1 Rf2 34.Qc3 Rf1+ 35.Kh2 Bxg2 36.Qd3 Bd5 0-1
2012.07.15 2nd Science Park Open A
3438205 IM Wiersma, E (2375) Bijlsma, N (2130) 1/2-1/2
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 c6 8.Qb3 a5 9.Be2 b5 10.e5 a4 11.Qd1 Nd5 12.Nxd5 Qxd5 13.O-O f6 14.Be3 Be6 15.exf6 exf6 16.Ne1 Na6 17.Nd3 Qd7 18.Qd2 Rfd8 19.Rfc1 Bc4 20.b3 Bd5 21.bxa4 bxa4 22.Nf4 Nc7 23.Qc2 Ne6 24.Nxe6 1/2-1/2
2012.07.14 2nd Science Park Open A
3438172 Diaz Herrero, A (2137) IM Wiersma, E (2375) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Nxc6 bxc6 7.e5 Nd5 8.Ne4 Qc7 9.f4 Qb6 10.c4 Ne3 11.Qd3 Nf5 12.g4 Nd4 13.Kd1 c5 14.h4 Bb7 15.Rh2 d6 16.exd6 Bxd6 17.Be3 O-O-O 18.Rd2 Be7 19.b4 Qxb4 20.Rb1 Qa4+ 21.Kc1 Nf3 22.Rdb2 Bxe4 23.Rb8+ Kc7 0-1
2011.09.27 27th ECC
1380068 Korchnoi, Viktor (2556) Wiersma, E (2391) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Nge2 Nc6 7.Be3 a6 8.Rc1 Bd7 9.d5 Ne5 10.Ng3 c6 11.f4 Neg4 12.Bg1 Bh6 13.Nge2 cxd5 14.cxd5 Ne8 15.h3 Ngf6 16.g4 Bg7 17.e5 dxe5 18.fxe5 Nxg4 19.hxg4 Bxe5 20.Bd4 Qb8 21.Bh3 Nf6 22.g5 Ng4 23.Bg2 f5 24.gxf6 Nxf6 1-0
2009.08.13 7th Staunton Memorial GM
1379924 Korchnoi, Viktor (2561) Wiersma, E (2403) 1/2-1/2
1.d4 f5 2.g3 Nf6 3.Bg2 g6 4.b4 Bg7 5.Bb2 O-O 6.Nf3 Nc6 7.a3 Ne4 8.Qd3 d5 9.c4 Be6 10.cxd5 Bxd5 11.O-O a5 12.b5 Na7 13.Ne5 e6 14.f3 Bxe5 15.fxe4 fxe4 16.Rxf8+ Kxf8 17.Bxe4 Bxe4 18.Qxe4 Bg7 19.a4 Qd5 20.Nd2 Rd8 21.Qxd5 exd5 22.Nf3 Nc8 23.Bc3 b6 24.Bb2 Nd6 25.Ba3 Ke8 26.Bxd6 Rxd6 27.Rc1 Kd7 28.g4 Re6 29.Kf2 Re4 30.e3 Rxg4 31.Rc6 Re4 32.Ng5 Re7 33.Nxh7 Rf7+ 34.Kg3 Re7 35.Kf3 Re6 36.Rxe6 Kxe6 37.Ng5+ Kd7 38.e4 dxe4+ 39.Kxe4 c6 40.bxc6+ Kxc6 41.Ne6 Bf6 42.d5+ Kd6 43.h3 Be7 44.Kd4 Bf6+ 45.Kc4 Be5 46.Ng5 Bf4 47.Nf3 Bg3 48.Nd4 Bf2 49.Ne6 Be3 50.Nf8 g5 51.Ne6 Bc1 52.Kd4 Bb2+ 53.Kc4 Bc1 54.Nd4 Bf4 55.Nb5+ Ke5 56.Nc7 Kd6 57.Na8 Be3 58.Kb5 Kxd5 59.Nxb6+ Ke4 60.Kxa5 Kf3 61.Kb5 Bd2 62.Nc4 Be1 63.Ne5+ Kg3 64.Kc4 Kxh3 65.Nf3 Bh4 66.Nxh4 Kxh4 1/2-1/2
version fa9c69a7dde0
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