WORLDBASE

WORLDBASE Players CM Derr, Oleg

Stockfish
GameID: 0
FIDE Country B-Year Gender Standard Rapid Blitz
34611517 GER 2011 M 2166 2199 2194
141 games
2026.07.14 Titled Tue 14th Jul 2026
3482640 WGM Kanyamarala, Trisha (2178) CM Derr, Oleg (2152) 1/2-1/2
1.c4 e6 2.Nc3 d5 3.e3 Nf6 4.Nf3 Bd6 5.b3 O-O 6.Bb2 b6 7.Nb5 Be7 8.Be5 Na6 9.Rc1 c6 10.Nc3 Bb7 11.Be2 Nc5 12.d4 Nce4 13.O-O Nxc3 14.Rxc3 Ne4 15.Rc1 Ba3 16.Rc2 Bb4 17.Qa1 Bd6 18.Bd3 f6 19.Bxe4 dxe4 20.Bxd6 Qxd6 21.Nd2 c5 22.b4 cxd4 23.Qxd4 Qxb4 24.Rb1 Qe7 25.c5 bxc5 26.Qxc5 Qxc5 27.Rxc5 Bd5 28.a4 Rfc8 29.Rbc1 Rxc5 30.Rxc5 Rb8 31.f3 exf3 32.Nxf3 Rb3 33.Rc8+ Kf7 34.Rc7+ Kg8 35.Rxa7 Rxe3 36.Kf2 Ra3 37.a5 e5 38.a6 e4 39.Nd4 e3+ 40.Ke2 Bc4+ 41.Kd1 Rxa6 42.Rc7 Bd3 43.Nc2 Bxc2+ 44.Rxc2 Rd6+ 45.Ke1 Rd2 46.Rc8+ Kf7 47.Kf1 f5 48.Rc7+ Kg6 49.Rc6+ Kg5 50.Rc7 Rf2+ 51.Kg1 Kf4 52.Rxg7 Ra2 53.Kf1 h5 54.Rc7 Rf2+ 55.Kg1 Rd2 56.Rc4+ Ke5 57.Kf1 Rd4 58.Rc3 Ke4 59.Ra3 Rd1+ 60.Ke2 Rd2+ 61.Kf1 Rf2+ 62.Kg1 Rd2 63.Kf1 Rf2+ 64.Kg1 Rd2 65.Kf1 1/2-1/2
2026.07.14 Titled Tue 14th Jul 2026
3482142 Rahul Mynala (1990) CM Derr, Oleg (2152) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3 dxc4 8.Bxc4 c5 9.Nf3 Qc7 10.Be2 b6 11.O-O Bb7 12.Bb2 Nc6 13.Rc1 Ne7 14.Nd2 Rfd8 15.a4 Rac8 16.Qb3 Ng6 17.Rfd1 Nh4 18.f3 Nd5 19.Nf1 f5 20.g3 Ng6 21.e4 c4 22.Qc2 fxe4 23.fxe4 Nf6 24.Nd2 Kh8 25.Rf1 e5 26.d5 Qc5+ 27.Kg2 a6 28.Nxc4 Nxe4 29.Ba3 Qxd5 30.Ne3 Qa5 31.Bf3 Rd2+ 32.Qxd2 Nxd2 33.Bxb7 Nxf1 34.Rxf1 Rb8 35.Be4 Qxc3 36.Bc1 b5 37.axb5 axb5 38.Nd5 Qd4 39.Re1 b4 40.Re2 b3 41.Bb2 Qc4 42.Bf3 e4 43.Rxe4 Qxd5 44.Re8+ Rxe8 45.Bxd5 Re2+ 46.Kf3 Rxb2 47.Ke3 Rxh2 48.Bxb3 h5 49.Kf3 h4 50.gxh4 Rxh4 51.Be6 Rf4+ 52.Kg3 Rf6 53.Bf5 Kh7 54.Be4 Kh6 55.Kg4 Ne5+ 56.Kg3 g5 57.Bf3 Ng6 58.Bg4 Nh4 59.Kh3 Kg6 60.Bf3 Rf4 61.Kg3 Rxf3+ 62.Kh2 Kf5 63.Kg1 Kf4 64.Kh2 Kg4 65.Kh1 Kg3 66.Kg1 Rb3 67.Kf1 g4 68.Ke2 Nf3 69.Kf1 Rb2 1/2-1/2
2026.07.14 Titled Tue 14th Jul 2026
3482402 CM Derr, Oleg (2152) IM Perez Gormaz, M (2388) 0-1
1.b3 d5 2.Bb2 c5 3.Nf3 Nf6 4.e3 g6 5.Bxf6 exf6 6.c4 Bg7 7.cxd5 Qxd5 8.Nc3 Qd8 9.Rc1 O-O 10.Be2 Nc6 11.O-O b6 12.Ne4 f5 13.Ng3 Bb7 14.Bc4 Qe7 15.Re1 Rad8 16.Qc2 Nb4 17.Qb1 Bxf3 18.gxf3 Rxd2 19.Re2 Rfd8 20.a3 Nc6 21.f4 R2d6 22.Qc2 h5 23.Nf1 Qh4 24.Ng3 Qg4 25.Kg2 Qh4 26.h3 Qe7 27.Nf1 Qb7 28.Kg1 b5 0-1
2026.07.14 Titled Tue 14th Jul 2026
3481145 Aimdilokwong, Alec D (2047) CM Derr, Oleg (2152) 1-0
1.c4 e6 2.g3 Nf6 3.Bg2 d5 4.Nf3 Bd6 5.O-O O-O 6.d4 Nc6 7.Nbd2 a5 8.Qc2 Nb4 9.Qb1 c5 10.a3 Nc6 11.cxd5 Nxd5 12.dxc5 Bxc5 13.Ne4 Be7 14.Rd1 h6 15.Nc3 Nxc3 16.bxc3 Qc7 17.Nd4 Bd7 18.Nb5 Qc8 19.Nd6 Bxd6 20.Rxd6 Qc7 21.Rd1 Rfc8 22.Bf4 e5 23.Be3 Be6 24.Qb2 a4 25.Bd5 Na5 26.Bxe6 fxe6 27.Qb5 Nc4 28.Rd7 Qc6 29.Qxc6 Rxc6 30.Rxb7 Nxe3 31.fxe3 Rxc3 32.Rd1 Kh7 33.Rdd7 Rg8 34.Rd3 Rgc8 35.Rb4 Rxd3 36.exd3 Rc3 37.Rxa4 Rxd3 38.Re4 Rxa3 39.Rxe5 Ra1+ 40.Kg2 Ra2+ 41.Kh3 Ra6 42.g4 Rd6 43.Kg3 Kg6 44.h4 Kf6 45.Ra5 g5 46.h5 Rd3 47.Kf3 Rd7 48.Ra8 Rh7 49.Rf8+ Kg7 50.Rb8 Kf6 51.Ke4 Kg7 52.Re8 Kf7 53.Rc8 Rg7 54.Ke5 Rh7 55.Rc7+ Kg8 56.Rxh7 Kxh7 57.Kxe6 Kg7 58.Ke7 Kg8 59.Kf6 Kh8 60.Kg6 Kg8 61.Kxh6 Kh8 62.Kxg5 Kg8 63.h6 Kh8 64.Kh5 Kg8 65.g5 Kh8 66.g6 Kg8 67.e4 Kh8 68.e5 Kg8 69.e6 Kf8 70.h7 Ke8 71.h8=Q+ Ke7 72.Qg7+ Kd6 73.Qf7 1-0
2026.07.14 Titled Tue 14th Jul 2026
3482221 CM Derr, Oleg (2152) Seccafim, Caic dos Santos (2031) 1-0
1.b3 f5 2.Bb2 Nf6 3.c4 e6 4.Nf3 d5 5.g3 Bd6 6.Bg2 O-O 7.O-O c6 8.d4 Nbd7 9.Nbd2 Ne4 10.Ne5 Ndf6 11.Ndf3 Qe8 12.Nd3 Qh5 13.h3 g5 14.Nfe5 g4 15.Nf4 Qh6 16.h4 Nh5 17.e3 Nhxg3 18.fxg3 Nxg3 19.Rf2 Qxh4 20.Qe1 Rf6 21.Ne2 Rh6 22.Nxg3 Qxg3 23.Re2 Qh2+ 24.Kf1 Rf6 25.cxd5 exd5 26.Bxd5+ cxd5 27.Rxh2 Be6 28.Qh4 Rf7 29.Nxf7 Bxh2 30.Ng5 Bf4 31.Qxh7+ Kf8 32.Nxe6+ Ke8 33.Nxf4 Rc8 34.Qxf5 Rc1+ 35.Rxc1 g3 36.Rc8+ Ke7 37.Nxd5+ Kd6 38.Ba3# 1-0
2026.07.14 Titled Tue 14th Jul 2026
3481200 FM Shubh Atha (2300) CM Derr, Oleg (2152) 1-0
1.c4 e6 2.Nc3 d5 3.e3 Nf6 4.Nf3 Bd6 5.d4 O-O 6.b3 b6 7.Bd3 a6 8.O-O Bb7 9.Qc2 Nbd7 10.Bb2 Rc8 11.e4 dxe4 12.Nxe4 Nxe4 13.Bxe4 Bxe4 14.Qxe4 Nf6 15.Qb7 Ra8 16.Rad1 Qe7 17.Rfe1 c5 18.Qxb6 Rfb8 19.Qc6 Rc8 20.Qa4 cxd4 21.Nxd4 Ng4 22.Nf3 Qc7 23.h3 Bh2+ 24.Kf1 Nh6 25.Rd7 Qf4 26.Be5 Qf5 27.Bxh2 1-0
2026.07.14 Titled Tue 14th Jul 2026
3481501 CM Derr, Oleg (2152) FM Kazarian, Anna-Maja (2310) 1-0
1.b3 Nf6 2.Bb2 d6 3.c4 e5 4.Nf3 Be7 5.e3 O-O 6.Nc3 Bg4 7.h3 Bh5 8.Be2 c5 9.O-O Nbd7 10.d4 Re8 11.dxe5 dxe5 12.Nh4 Bxe2 13.Qxe2 g6 14.Rad1 Qb6 15.Nf3 Rad8 16.Rd2 e4 17.Ng5 Bd6 18.Rfd1 Be5 19.Ngxe4 Nxe4 20.Nxe4 Bxb2 21.Rxd7 Rxd7 22.Rxd7 Bg7 23.Qf3 Qe6 24.Rxb7 Rd8 25.Nxc5 Qe8 26.Rxa7 Be5 27.g3 Kg7 28.Ne4 h6 29.c5 Qe6 30.c6 Rf8 31.Nc5 Qxh3 32.Nd7 Qe6 33.Nxf8 Kxf8 34.c7 Qc8 35.Ra8 1-0
2026.07.14 Titled Tue 14th Jul 2026
3481808 CM Derr, Oleg (2152) NM Osborne, Adam 0-1
1.b3 d6 2.Bb2 e5 3.c4 Nd7 4.Nf3 g6 5.e3 Bg7 6.d4 Ne7 7.Nc3 O-O 8.Be2 f5 9.O-O e4 10.Nd2 Nf6 11.f3 exf3 12.Bxf3 c6 13.e4 fxe4 14.Ndxe4 Nxe4 15.Nxe4 Nf5 16.Qd3 Qc7 17.Rac1 Bd7 18.Ba3 Bxd4+ 19.Kh1 c5 20.Nc3 Bc6 21.Bd5+ Kh8 22.Bxc6 bxc6 23.Ne4 Rae8 24.g4 Ne3 25.Rxf8+ Rxf8 26.h3 Qe7 27.Re1 Nxg4 28.hxg4 Qh4+ 29.Kg2 Qxe1 30.b4 Qg1+ 31.Kh3 Qh1+ 32.Kg3 Be5# 0-1
2026.07.14 Titled Tue 14th Jul 2026
3481599 IM Caprio, G (2408) CM Derr, Oleg (2152) 0-1
1.e3 Nf6 2.d4 e6 3.c4 c5 4.Ne2 Nc6 5.d5 Ne5 6.Nec3 d6 7.f4 Ned7 8.e4 e5 9.f5 g6 10.Bg5 Be7 11.Be3 Nb6 12.g4 h5 13.fxg6 Nxg4 14.gxf7+ Kxf7 15.Qf3+ Kg6 16.Rg1 Rf8 17.Kd2 0-1
2026.06.30 Titled Tue 30th Jun 2026
3465756 CM Derr, Oleg (2194) WIM Hryzlova, Sofiia (2276) 0-1
1.b3 e5 2.Bb2 Nc6 3.c4 f5 4.e3 Nf6 5.d4 Bb4+ 6.Nd2 exd4 7.exd4 Qe7+ 8.Be2 Ne4 9.Nf3 Bc3 10.Qc1 Nxd4 11.Nxd4 Bxd2+ 12.Qxd2 Nxd2 13.Kxd2 O-O 14.Bf3 Qg5+ 15.Kc2 c6 16.Rae1 d6 17.h4 Qd8 18.h5 h6 19.Rh3 f4 20.Rhh1 Bf5+ 21.Nxf5 Rxf5 22.Bg4 Rg5 23.f3 a5 24.Re6 d5 25.Rd1 a4 26.cxd5 cxd5 27.Re2 axb3+ 28.axb3 Qc7+ 29.Kb1 Qa5 30.Rde1 Qa2+ 31.Kc2 Rxg4 32.fxg4 Rc8+ 33.Kd3 Qxb3+ 34.Kd4 Qc4+ 35.Ke5 Re8+ 36.Kf5 Rxe2 0-1
2026.06.30 Titled Tue 30th Jun 2026
3466033 CM Derr, Oleg (2194) Calderon, Zachary (2033) 0-1
1.b3 d5 2.Bb2 Nf6 3.Nf3 Bf5 4.d3 e6 5.Nbd2 h6 6.g3 Be7 7.Bg2 O-O 8.O-O Bh7 9.Re1 c5 10.e4 Nc6 11.a3 b5 12.Qe2 a5 13.h4 b4 14.a4 dxe4 15.dxe4 Qc7 16.Rad1 Rad8 17.e5 Nd5 18.Ne4 Bxe4 19.Qxe4 Nb6 20.g4 c4 21.g5 hxg5 22.Nxg5 Bxg5 23.hxg5 Ne7 24.Bc1 g6 25.bxc4 Qxc4 26.Qxc4 Nxc4 27.Bf1 Nxe5 28.Bg2 Nc4 29.Bf4 Nf5 30.Kf1 Rxd1 31.Rxd1 Na3 32.Be4 Rc8 33.Rd2 Nc4 34.Rd7 Nb6 35.Ra7 Nxa4 36.Rxa5 Nc3 37.Bd3 Nd5 38.Be5 Nfe7 39.Rb5 Nc6 40.Be4 Nxe5 41.Bxd5 exd5 42.Rxd5 Nf3 43.Rb5 Rxc2 44.Rxb4 Nxg5 45.Kg2 Ne6 46.Rb8+ Kg7 47.Kf3 Nd4+ 48.Kg3 Nf5+ 49.Kf4 Rc4+ 50.Ke5 Rc2 51.Ke4 Rxf2 52.Kd5 Rd2+ 53.Kc4 Re2 54.Kb3 Re7 55.Kc2 Kf6 56.Kd1 Re6 57.Rb7 g5 58.Rb5 g4 59.Rb7 Re5 60.Rb6+ Kg5 61.Rb4 g3 62.Rg4+ Kxg4 0-1
2026.06.30 Titled Tue 30th Jun 2026
3464817 CM Derr, Oleg (2194) GM Pranav, V (2661) 0-1
1.e4 Nc6 2.Nf3 d6 3.d4 Nf6 4.Nc3 g6 5.Bb5 a6 6.Ba4 Bd7 7.e5 dxe5 8.dxe5 Ng4 9.Qe2 Bg7 10.Bf4 Nh6 11.O-O-O Qc8 12.Nd5 b5 13.Bb3 O-O 14.h3 Kh8 15.g4 Ng8 16.Bg3 Na5 17.Nxc7 Nxb3+ 18.axb3 Ra7 19.Nd5 Be6 20.Ng5 Qc6 21.Nxe6 fxe6 22.Nc3 b4 23.Ne4 a5 24.Qc4 Qa8 25.h4 a4 26.Nc5 Rc8 27.h5 axb3 28.hxg6 h6 29.cxb3 Ra5 30.Qxe6 Rcxc5+ 31.Kd2 Qe4 32.Rde1 Rc2+ 33.Kd1 Ra1# 0-1
2026.06.30 Titled Tue 30th Jun 2026
3465074 FM Grot, Blazej (2299) CM Derr, Oleg (2194) 1-0
1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.d4 Bd6 5.Bg2 O-O 6.O-O Nc6 7.b3 dxc4 8.bxc4 e5 9.c5 Be7 10.dxe5 Qxd1 11.Rxd1 Ne4 12.Be3 Bxc5 13.Bxc5 Nxc5 14.Nc3 Be6 15.Nb5 Rac8 16.Nfd4 Nxd4 17.Nxd4 c6 18.e4 Rfd8 19.f4 Bc4 20.Kf2 Kf8 21.Ke3 b5 22.a3 a5 23.Nf5 Nb7 24.Nd6 Rc7 25.Nxc4 bxc4 26.Bf1 Rxd1 27.Rxd1 Nc5 28.Bxc4 Rb7 29.Rd6 Rb6 30.f5 Ke7 31.Kd4 Nd7 32.Bxf7 Nxe5 33.Kxe5 Kxf7 34.Rd7+ Kf8 35.Ra7 c5 36.Rxa5 Rc6 37.Kd5 Rc8 38.Rxc5 1-0
2026.06.30 Titled Tue 30th Jun 2026
3465332 CM Derr, Oleg (2194) Tikhomirov, Matthew (2160) 1-0
1.b3 d5 2.Bb2 Nf6 3.Nf3 e6 4.e3 Be7 5.c4 O-O 6.Nc3 c5 7.cxd5 exd5 8.d4 Nc6 9.Be2 Re8 10.dxc5 Bxc5 11.O-O a6 12.Rc1 Ba7 13.Na4 Bg4 14.h3 Bh5 15.Nc5 Qe7 16.Nd3 Rad8 17.Nf4 Bg6 18.Nxg6 hxg6 19.Bxa6 Ne4 20.Bb5 Nxf2 21.Rxf2 Bxe3 22.Bxc6 Bxf2+ 23.Kxf2 Qe3+ 24.Kf1 bxc6 25.Rxc6 Re4 26.Bd4 Qf4 27.a4 Rde8 28.a5 g5 29.a6 g4 30.hxg4 Qxg4 31.a7 Qd7 32.Rc3 Qb7 33.Qd3 Qb4 34.Kf2 Qa5 35.Rc2 Qa3 36.Qb5 R4e6 37.Rc6 Rxc6 38.Qxc6 Qa2+ 39.Kg3 Rf8 40.Bc5 Rd8 41.Ng5 Qe2 42.Nf3 Qe6 43.a8=Q Rxa8 44.Qxa8+ Kh7 45.Qa7 Kg6 46.Nh4+ Kg5 47.Nf3+ Kh5 48.Kf2 1-0
2026.06.30 Titled Tue 30th Jun 2026
3464584 CM Derr, Oleg (2194) Nasir, Zehn (2076) 1-0
1.b3 d5 2.Bb2 Nf6 3.Nf3 Bf5 4.d3 e6 5.Nbd2 Bd6 6.g3 Nbd7 7.Bg2 O-O 8.O-O Re8 9.Re1 e5 10.e4 dxe4 11.dxe4 Bg6 12.Qe2 Qe7 13.Rad1 Bb4 14.Nh4 Bh5 15.Bf3 Bxf3 16.Qxf3 g6 17.Bc3 Rad8 18.Nc4 Bxc3 19.Qxc3 Nb6 20.Rxd8 Rxd8 21.Nxe5 Re8 22.f4 Nh5 23.Nhf3 c6 24.Ng4 Nd7 25.Nh6+ Kf8 26.Qh8# 1-0
2026.06.30 Titled Tue 30th Jun 2026
3465657 GM Akash, G (2415) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.Nc3 e5 4.Bc4 Be7 5.d3 d6 6.Nd2 Nf6 7.Nf1 Bg4 8.f3 Be6 9.Ne3 O-O 10.O-O Nb4 11.a3 d5 12.exd5 Nbxd5 13.Nexd5 Nxd5 14.Qe1 Nxc3 15.Bxe6 fxe6 16.Qxc3 Qd4+ 17.Qxd4 cxd4 18.Rf2 Rac8 19.Kf1 Rc6 20.Ke1 Rfc8 21.Kd1 Bd6 22.Re2 Kf7 23.Bg5 Rb6 24.Ra2 Rb5 25.Bh4 Rc6 26.Bg3 Rcb6 27.b3 Kf6 28.Bf2 Rc6 29.Be1 Ra6 30.a4 Rd5 31.Kc1 b5 32.a5 b4 33.Kb2 Rdxa5 34.Rxa5 Rxa5 35.Bh4+ g5 36.Bg3 h5 37.Re4 h4 38.Be1 Rb5 39.Bd2 Rb8 40.Re1 Bc7 41.Rh1 Rh8 42.Rf1 Kg6 43.Re1 a5 44.Re4 Bd6 45.Rg4 Rh5 46.Be1 Kf6 47.Bf2 Bc7 48.Kc1 Bd6 49.Kd2 Rh8 50.Re4 a4 51.bxa4 Ra8 52.g3 Rxa4 53.gxh4 gxh4 54.Bxh4+ Kf5 55.Bg3 Ra2 56.Kc1 Bc7 57.Kb1 Ra3 58.Kb2 Bd6 59.Rh4 b3 60.cxb3 Ra7 61.Rh5+ Kf6 62.Bh4+ Kg6 63.Rg5+ Kh6 64.Rg4 Rc7 65.Be1 1-0
2026.06.30 Titled Tue 30th Jun 2026
3465435 FM Albrecht, Neil (2344) CM Derr, Oleg (2194) 1-0
1.Nf3 Nf6 2.c4 e6 3.e3 d5 4.Nc3 Bd6 5.b3 b6 6.Bb2 Bb7 7.Be2 O-O 8.O-O a6 9.cxd5 exd5 10.d4 Nbd7 11.Rc1 Ne4 12.Nxe4 dxe4 13.Nd2 Qg5 14.Nc4 Be7 15.Ba3 Bxa3 16.Nxa3 c5 17.Nc4 cxd4 18.Qxd4 Rad8 19.Qb2 b5 20.Na5 Bd5 21.Rfd1 Ne5 22.h4 Qf6 23.Qa1 Rfe8 24.g3 Qf5 25.Rd4 Ba8 26.Rxd8 Rxd8 27.Rd1 Re8 28.Rd2 g6 29.Qd1 Qh3 30.Qf1 Qf5 31.Rd4 Kg7 32.a4 bxa4 33.bxa4 Re6 34.Nc4 Nd3 35.Bxd3 exd3 36.Qxd3 Be4 37.Qc3 Qh3 38.Rxe4+ 1-0
2026.06.16 Titled Tue 16th Jun 2026
2306090 WFM Yasaswi Krishna Bommi (2085) CM Derr, Oleg (2194) 0-1
1.d4 Nf6 2.Nf3 g6 3.Bf4 Bg7 4.e3 O-O 5.h3 d5 6.Be2 c5 7.O-O Nc6 8.c3 b6 9.Nbd2 Bb7 10.Bh2 Rc8 11.a4 Ne4 12.Bd3 f5 13.Nxe4 fxe4 14.Ng5 exd3 15.Ne6 Qd7 16.Nxf8 Rxf8 17.Qxd3 e6 18.dxc5 bxc5 19.Rad1 Qf7 20.e4 dxe4 21.Qxe4 Nd4 22.Qg4 Nf5 23.Rfe1 h5 0-1
2026.06.16 Titled Tue 16th Jun 2026
2305342 FM Gaydym, Michail (2337) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 e6 6.Be3 Nd4 7.Qd2 Rb8 8.Nd1 b5 9.c3 Nc6 10.Bxc5 d6 11.Be3 b4 12.Ne2 Nge7 13.Bh6 O-O 14.h4 bxc3 15.bxc3 Ne5 16.Bxg7 Kxg7 17.h5 Rh8 18.h6+ Kg8 19.O-O f5 20.Ne3 Kf7 21.d4 N5c6 22.exf5 gxf5 23.d5 Ne5 24.dxe6+ Bxe6 25.Nf4 Rg8 26.Nxe6 Kxe6 27.f4 Ng4 28.Bd5+ Nxd5 29.Qxd5+ Kd7 30.Qxf5+ Kc7 31.Nxg4 1-0
2026.06.16 Titled Tue 16th Jun 2026
2305101 CM Derr, Oleg (2194) WCM Venskaya, Nika (2055) 0-1
1.b3 Nf6 2.Bb2 g6 3.c4 Bg7 4.Nf3 O-O 5.g3 b6 6.Bg2 Bb7 7.O-O e6 8.Nc3 Qe7 9.d4 d5 10.cxd5 exd5 11.Rc1 Na6 12.a3 Rfd8 13.Qc2 Rac8 14.b4 c5 15.dxc5 bxc5 16.bxc5 Nxc5 17.Rfd1 Ne6 18.Qa4 Bc6 19.Qb4 Qe8 20.Qh4 Ne4 21.Nxe4 Bxb2 22.Nf6+ Bxf6 23.Qxf6 Bb7 24.Rxc8 Rxc8 25.Ne5 Rc5 26.Bh3 Bc8 27.Bg2 Nc7 28.f4 Be6 29.e4 Qc8 30.f5 Ne8 31.Qh4 gxf5 32.Qg5+ Kf8 33.exf5 Bxf5 34.Qh6+ Kg8 35.Bxd5 Rxd5 36.Rxd5 Bg6 37.Nxg6 hxg6 38.Qg5 Qc6 39.Rd8 Qb6+ 40.Kg2 Qc6+ 41.Kh3 Kg7 42.Qe5+ Nf6 43.Rd6 Qb6 44.Qxf6+ Kh7 45.Rxb6 axb6 46.Qxb6 g5 47.Qc7 g4+ 0-1
2026.06.16 Titled Tue 16th Jun 2026
2305945 CM Derr, Oleg (2194) WFM Samaganova, A (1943) 1-0
1.b3 c5 2.Bb2 Nc6 3.Nf3 Nf6 4.c4 e6 5.g3 Be7 6.Bg2 O-O 7.O-O d5 8.cxd5 Nxd5 9.Nc3 Nxc3 10.Bxc3 Nd4 11.e3 Nb5 12.Bb2 Bd7 13.Ne5 Rb8 14.a4 Nc7 15.Qg4 f6 16.Nxd7 Qxd7 17.d4 b6 18.Rfd1 Qc8 19.Rac1 Nd5 20.dxc5 bxc5 21.Bh3 Rxb3 22.Qxe6+ Qxe6 23.Bxe6+ Kh8 24.Rxd5 Rxb2 25.Rd7 Bd8 26.Rxc5 Bb6 27.Rc6 h5 28.h4 Kh7 29.Rb7 Rd2 30.Bf5+ Kh6 31.Re6 Rd5 32.Be4 Re5 33.Rxe5 fxe5 34.Re7 Rc8 35.Re6+ g6 36.Rxg6+ Kh7 37.Rc6+ 1-0
2026.06.16 Titled Tue 16th Jun 2026
2305698 CM Derr, Oleg (2194) CM Smieszek, W (2106) 1/2-1/2
1.b3 d5 2.Bb2 Nc6 3.Nf3 Nf6 4.e3 Bg4 5.h3 Bxf3 6.Qxf3 e6 7.Be2 Be7 8.O-O O-O 9.d3 e5 10.Nd2 Re8 11.e4 dxe4 12.Nxe4 Nxe4 13.dxe4 Nd4 14.Bxd4 exd4 15.Rad1 Bd6 16.Bc4 Qe7 17.Rfe1 c5 18.Rd2 Rf8 19.e5 Bc7 20.Rde2 a6 21.Qxb7 a5 22.Qc6 Rac8 23.Qd5 Rfd8 24.Qf3 Rf8 25.a4 Kh8 26.Qg4 f5 27.exf6 Qxf6 28.Qxc8 Rxc8 29.Re8+ Qf8 30.Rxf8+ Rxf8 31.Re7 Bb8 32.Rb7 Re8 33.g3 h5 34.h4 Bd6 35.Ra7 Re5 36.Ra8+ Kh7 37.Bd3+ g6 38.Rxa5 Kg7 39.Ra7+ Kf6 40.a5 g5 41.hxg5+ Kxg5 42.a6 Re8 43.Rg7+ Kf6 44.Rg6+ Ke5 45.f4+ Kd5 46.Rg5+ Kc6 47.Rxh5 Rg8 48.Kf2 Kb6 49.Rh6 Kc7 50.Be4 c4 51.a7 d3 52.bxc4 Bc5+ 53.Ke1 d2+ 54.Kxd2 Bxa7 55.Rh7+ Kb6 56.c5+ Kxc5 57.Rxa7 Rxg3 58.f5 Kd4 59.Ra4+ Ke5 60.Bd3 Rg2+ 61.Kc3 Rf2 62.Ra5+ Kd6 63.Ra6+ Kc5 64.Re6 Kd5 65.Re8 Kc5 66.Rc8+ Kd5 67.Rf8 Ke5 68.Kb4 Rf4+ 69.Kc5 Rf3 70.Re8+ Kf6 71.Re6+ Kf7 72.Rc6 Ke7 73.Bc4 Rxf5+ 74.Bd5 Rf2 75.c4 Kd7 76.Re6 Rf5 77.Rh6 Rf8 78.Rh7+ Kd8 79.Kd6 Kc8 80.Be6+ Kb8 81.c5 Rd8+ 82.Kc6 Re8 83.Rb7+ Ka8 84.Bd5 Rc8+ 85.Kb6 Rc6+ 86.Bxc6 1/2-1/2
2026.06.16 Titled Tue 16th Jun 2026
2305211 CM Mukhsinov, Mukhammad Yusuf (2089) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Nd5 Nf6 9.Bg5 Bxd5 10.exd5 Qa5+ 11.c3 Qxd5 12.Qxd5 Nxd5 13.O-O-O Nc7 14.f4 Ne6 15.Bc4 Nxg5 16.fxg5 Be7 17.h4 h6 18.Rhf1 hxg5 19.Bxf7+ Kd7 20.h5 Raf8 21.g4 Kc7 22.Nc2 Bf6 23.Bg6 Ne7 24.Be4 Rd8 25.Ne3 Rhf8 26.c4 b5 27.b3 bxc4 28.bxc4 Rb8 29.Kc2 Rb4 30.Rb1 Rfb8 31.Rxb4 Rxb4 32.h6 Rb8 33.h7 Rh8 34.Kd3 Kd7 35.Nd5 Nxd5 36.cxd5 Ke7 37.Bg6 Kd7 38.Ke4 Kc7 39.Rb1 Be7 40.a4 Rf8 41.Rh1 Rh8 42.Rf1 Bf6 43.Kf5 Kd7 44.Rb1 Bd8 45.Rh1 Rf8+ 46.Ke4 Rh8 47.Bf7 g6 48.Bg8 Bf6 49.Rh6 Ke7 50.Rxg6 a5 51.Kf5 1-0
2026.06.16 Titled Tue 16th Jun 2026
2306242 CM Derr, Oleg (2194) FM Khromkin, A (2191) 0-1
1.e4 c5 2.Nf3 Nc6 3.Nc3 g6 4.d4 cxd4 5.Nxd4 Bg7 6.Be3 Nf6 7.Nxc6 bxc6 8.e5 Nd5 9.Nxd5 cxd5 10.Qxd5 Rb8 11.O-O-O O-O 12.h4 Qc7 13.Qc5 Bxe5 14.Qxc7 Bxc7 15.Bc4 Bb6 16.Bf4 d6 17.h5 Be6 18.Bxe6 fxe6 19.Bg5 Rxf2 20.hxg6 hxg6 21.Bxe7 d5 22.Bd6 Rc8 23.Be5 Rcxc2+ 24.Kb1 d4 25.Rh8+ Kf7 26.Rh7+ Ke8 27.Bxd4 Bxd4 28.Rxd4 Rxb2+ 29.Kc1 Rxa2 30.Kb1 Rfb2+ 31.Kc1 Rxg2 32.Kb1 Rgb2+ 33.Kc1 Rh2 34.Kb1 Rxh7 0-1
2026.06.16 Titled Tue 16th Jun 2026
2305737 CM McDonald, Jhustice-Dimonte (2024) CM Derr, Oleg (2194) 0-1
1.e4 c5 2.Nf3 Nc6 3.Nc3 e5 4.Bc4 Be7 5.O-O d6 6.d3 Nf6 7.Bg5 O-O 8.h3 Nd7 9.Bxe7 Nxe7 10.Ng5 h6 11.Nxf7 Rxf7 12.Qh5 Qf8 13.Nd5 Nxd5 14.Bxd5 Nf6 15.Qxf7+ Qxf7 16.Bxf7+ Kxf7 17.f4 exf4 18.Rxf4 Bd7 19.Raf1 Re8 20.Kh2 Bc6 21.g4 d5 22.h4 Kg8 23.exd5 Bxd5 24.g5 Re2+ 25.Kg1 Rg2+ 26.Kh1 Nh5 27.Rf8+ Kh7 28.g6+ Kxg6 29.R8f3 Rg3 30.Kh2 Rxf3 31.Rg1+ Kf5 32.Re1 Rf2+ 33.Kh3 Nf4+ 34.Kg3 Rg2# 0-1
2026.06.02 Titled Tue 2nd Jun 2026
2288429 WFM Lakshmi, C (1957) CM Derr, Oleg (2194) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Nc4 Rb8 9.Ne3 Nf6 10.f3 g6 11.Ncd5 Bg7 12.c3 O-O 13.Be2 Ne7 14.Nxf6+ Bxf6 15.Bc4 Bxc4 16.Nxc4 d5 17.exd5 Nxd5 18.O-O b5 19.Ne3 Nf4 20.Ng4 Bg7 21.Be3 h5 22.Nf2 Qg5 23.Bxf4 exf4 24.Ne4 Qf5 25.Qd6 a5 26.Rfd1 b4 27.Rd5 Qe6 28.Qxe6 fxe6 29.Rxa5 bxc3 30.bxc3 Rfc8 31.Rc1 Rb2 32.a4 Ra2 33.Ra6 g5 34.Rxe6 Rxa4 35.Rg6 Kh7 36.Rxg5 h4 37.Rh5+ Kg8 38.Rxh4 Ra3 39.Rg4 Kh7 40.Ng5+ Kg6 41.Ne6+ Kf5 42.Nxg7+ Kf6 43.Re1 Kf7 0-1
2026.06.02 Titled Tue 2nd Jun 2026
2286656 FM Samdanov, S (2294) CM Derr, Oleg (2194) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 O-O 7.Bg5 h6 8.Bh4 c5 9.dxc5 d4 10.Qc2 Nc6 11.b4 Qe7 12.Bxf6 Qxf6 13.Rd1 a5 14.b5 Ne7 15.Nf3 e5 16.e4 dxe3 17.fxe3 Bf5 18.e4 Bg4 19.Rd6 Qf4 20.Be2 Bxf3 21.gxf3 Qh4+ 22.Kd1 Rac8 23.c6 bxc6 24.b6 Rfd8 25.c5 Rxd6+ 26.cxd6 Ng6 27.b7 Rb8 28.Qxc6 Qd8 29.Bc4 Nf4 30.Qc7 Ne6 31.Bxe6 fxe6 32.Ke2 Qf8 33.Rg1 Kh7 34.h4 Rd8 35.Qe7 Kg8 36.Rc1 Rb8 37.Qxf8+ Kxf8 38.Rc7 1-0
2026.06.02 Titled Tue 2nd Jun 2026
2287937 CM Derr, Oleg (2194) FM Sobek, J (2176) 0-1
1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 e5 6.Nf5 d5 7.cxd5 Bxf5 8.exf5 Nd4 9.Nc3 Nf6 10.Bd3 Be7 11.O-O Nxd5 12.Nxd5 Qxd5 13.Qg4 O-O 14.Be4 Qd7 15.h4 Kh8 16.Be3 Rad8 17.Rad1 Bf6 18.h5 h6 19.Bb1 Qb5 20.b3 Ne2+ 21.Kh1 Rxd1 22.Rxd1 Nc3 23.Rc1 Nxb1 24.Rxb1 Qd3 25.Rc1 e4 26.Rc4 Re8 27.Rc7 Qd5 28.Rc5 Qd7 29.Rc4 Qd5 30.Rc5 Qd3 31.Rc4 Qd5 32.Qe2 Qxf5 33.Rc7 Qd5 34.g3 Kh7 35.Kg2 Be5 36.Rc5 Qe6 37.Qc2 Bd6 38.Rc4 Qf5 39.Rd4 Bc5 40.Rc4 Qf3+ 41.Kh2 Bxe3 42.fxe3 Qxe3 43.Rc7 Qf3 44.Rxb7 Qxh5+ 45.Kg2 Qf3+ 46.Kh2 Re5 47.Qg2 Rh5+ 48.Kg1 Qd1+ 49.Kf2 Rf5+ 50.Ke3 Qd3# 0-1
2026.06.02 Titled Tue 2nd Jun 2026
2287184 CM Derr, Oleg (2194) FM Navrodskiy, Boris (2127) 0-1
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 Bg7 5.Qd2 Ng4 6.Bg5 f6 7.Bh4 O-O 8.f3 Nh6 9.O-O-O g5 10.Bf2 e5 11.h4 Nc6 12.Bc4+ Nf7 13.hxg5 fxg5 14.Nh3 exd4 15.Nb5 Ne5 16.Bb3 c5 17.Bd5 h6 18.c3 a6 19.cxd4 axb5 20.dxe5 Bxe5 21.Kb1 Qf6 22.Be3 Be6 23.f4 Bxd5 24.exd5 Qf5+ 25.Qd3 Qxd3+ 26.Rxd3 Bf6 27.fxg5 hxg5 28.Nxg5 Ne5 29.Rdd1 Nc4 30.Bc1 Bxg5 31.Bxg5 Rf2 32.Bc1 Rxg2 33.Rdg1 Rxg1 34.Rxg1+ Kf7 35.Rh1 Rg8 36.b3 Ne5 37.Bb2 Rg7 38.Rh6 Rg1+ 39.Kc2 Rg2+ 40.Kb1 Nd3 41.Rh7+ Kg8 42.Rh8+ Kf7 43.Rh7+ Ke8 44.Bf6 Rf2 45.Re7+ Kf8 46.Re6 Nf4 47.Rxd6 Rf1+ 48.Kb2 Nxd5 49.Rxd5 Rxf6 50.Rxc5 Rb6 51.Rc7 Ke8 52.Kc3 Kd8 53.Kd4 Kxc7 54.Kc5 Rc6+ 55.Kb4 Rb6 56.Ka3 Ra6+ 57.Kb2 Rb6 58.a3 b4 0-1
2026.06.02 Titled Tue 2nd Jun 2026
2288232 CM Derr, Oleg (2194) CM Yang, Maxwell (1953) 1-0
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 e5 7.Nf3 Be7 8.g4 h6 9.Rg1 g5 10.a4 Be6 11.Be3 Nbd7 12.Nd2 Rc8 13.f3 Nb6 14.a5 Nbd7 15.Nb3 Qc7 16.Qd2 Nc5 17.Nxc5 dxc5 18.Na4 Rd8 19.Qc3 Nd7 20.O-O-O O-O 21.h4 Qc6 22.b3 c4 23.Bxc4 Bxc4 24.Qxc4 Qxc4 25.bxc4 Nb8 26.hxg5 hxg5 27.Bb6 Rc8 28.c5 Bd8 29.Rd5 Bxb6 30.cxb6 f6 31.Kb2 Nc6 32.c3 Rfd8 33.Rgd1 Kf7 34.Rd7+ Ke6 35.R1d6# 1-0
2026.06.02 Titled Tue 2nd Jun 2026
2287482 WCM Jannur, Kupjasar (1994) CM Derr, Oleg (2194) 1-0
1.d4 Nf6 2.Bf4 e6 3.e3 d5 4.h4 Bd6 5.Bg5 h6 6.Bf4 c5 7.Nf3 Qc7 8.Ne5 Nc6 9.Bb5 Bd7 10.Nxd7 Nxd7 11.Bxd6 Qxd6 12.O-O O-O 13.Nc3 a6 14.Bxc6 bxc6 15.dxc5 Nxc5 16.e4 Qf4 17.exd5 cxd5 18.g3 Qf6 19.b4 Qxc3 20.bxc5 Qxc5 21.Qd3 Rfc8 22.Rfc1 Qc3 23.Qe2 Rc4 24.Rab1 Rac8 25.Rb3 Qf6 26.Rf3 Qg6 27.c3 Rxh4 28.Qxa6 Rhc4 29.Qa7 d4 30.Rd1 dxc3 31.Rd7 c2 32.Rfxf7 c1=N 33.Rxg7+ 1-0
2026.06.02 Titled Tue 2nd Jun 2026
2287812 CM Derr, Oleg (2194) Castillo, Sa (2163) 0-1
1.e4 c5 2.Nf3 e6 3.Bd3 d5 4.exd5 Qxd5 5.Nc3 Qd6 6.b3 Nf6 7.Bb2 Be7 8.Qe2 O-O 9.O-O-O a6 10.g4 b5 11.g5 Nfd7 12.Qe4 g6 13.Qh4 Bb7 14.Ne4 Qc7 15.Qh6 e5 16.Nxe5 f6 17.Nxd7 Nxd7 18.Rhe1 c4 19.Bf1 Rf7 20.Bh3 cxb3 21.axb3 Bxe4 22.Rxe4 Bf8 23.Qh4 Nc5 24.Re3 f5 25.f3 Rc8 26.Rc3 Bg7 27.Kb1 Bxc3 28.Bxc3 Rd7 29.Re1 a5 30.Bf1 Qb6 31.Qh6 a4 32.b4 Ne6 33.Re5 Nd4 34.Rc5 Rxc5 35.bxc5 Qxc5 36.Bd3 b4 37.Ba1 b3 38.cxb3 axb3 39.Bc3 Ra7 40.Qh4 Rd7 41.Bc4+ Qxc4 0-1
2026.06.02 Titled Tue 2nd Jun 2026
2288069 WCM Ramirez Luzon, Franchesca (1833) CM Derr, Oleg (2194) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Nd5 Nf6 9.Bg5 Bxd5 10.exd5 Qa5+ 11.c3 Qxd5 12.Qc2 Be7 13.Bxf6 Bxf6 14.Rd1 Qe6 15.Bc4 Qe7 16.O-O O-O 17.Rfe1 Rac8 18.Bd5 Nb4 19.Qb3 Nxd5 20.Qxd5 Rfd8 21.Nc4 Rxc4 22.Qxc4 g6 23.f4 Qf8 24.fxe5 dxe5 25.Rxd8 Qxd8 26.Qe4 Qb6+ 27.Kh1 Qxb2 28.Rb1 Qxc3 0-1
2026.06.02 Titled Tue 2nd Jun 2026
2287339 IM Pribelszky, Bence (2391) CM Derr, Oleg (2194) 1-0
1.Nf3 d5 2.c4 e6 3.e3 Nf6 4.Nc3 Bd6 5.b3 O-O 6.Bb2 c5 7.cxd5 exd5 8.d4 b6 9.g3 Bb7 10.Bg2 Na6 11.O-O Rc8 12.Rc1 Nc7 13.dxc5 bxc5 14.Ba3 h6 15.Na4 Ne6 16.Rc2 Ne4 17.Qc1 f5 18.Rd1 Qe7 19.Nc3 d4 20.Nb5 dxe3 21.Qxe3 Bb8 22.Qc1 a6 23.Nbd4 Nxd4 24.Nxd4 Qe5 25.Ne2 Rfd8 26.Re1 Ba7 27.Nc3 Qd4 28.Nxe4 fxe4 29.Rc4 Qd3 30.Bxe4 Bxe4 31.Rexe4 Qd1+ 32.Qxd1 Rxd1+ 33.Kg2 Rd2 34.Re7 Rxa2 35.Rxa7 Rxa3 36.b4 Rd3 37.Rxa6 Rd4 38.Rxc5 Rb8 39.b5 Rb4 40.Rc7 Rb2 41.Rg6 R8xb5 42.Rgxg7+ Kf8 43.Rcf7+ Ke8 44.h4 Re2 45.Rh7 Rbb2 46.Rf4 1-0
2026.06.02 Titled Tue 2nd Jun 2026
2286833 CM Derr, Oleg (2194) FM Bendayan Claros, A (2256) 0-1
1.b3 d5 2.Bb2 Bg4 3.h3 Bh5 4.g4 Bg6 5.Nf3 Nd7 6.d3 c6 7.h4 f6 8.h5 Bf7 9.g5 e5 10.Bg2 Qa5+ 11.Nbd2 Ba3 12.Qc1 Bxb2 13.Qxb2 Ne7 14.e4 O-O-O 15.O-O-O Kb8 16.Kb1 d4 17.gxf6 gxf6 18.Nh4 Rhg8 19.Bf3 Be6 20.Rdg1 Qxd2 21.Qa3 Nc8 22.h6 Rxg1+ 23.Rxg1 Qxf2 24.Rh1 Rg8 25.Qc1 a5 26.Bh5 a4 27.Nf3 axb3 28.axb3 Na7 29.Rh2 Qe3 30.Qf1 Nb5 31.Rg2 Rxg2 32.Qxg2 Nc3+ 33.Kb2 Qxh6 34.Be8 Kc7 35.Qg3 Qc1+ 36.Kxc1 Ne2+ 37.Kd2 Nxg3 0-1
2026.05.26 Titled Tue 26th May 2026
2280464 CM Derr, Oleg (2194) Ajili Rayen (2008) 1-0
1.b3 Nf6 2.Bb2 e6 3.Nf3 c5 4.c4 Nc6 5.g3 Be7 6.Bg2 O-O 7.O-O d5 8.cxd5 exd5 9.d4 Bf5 10.Nc3 h6 11.dxc5 Bxc5 12.Na4 Bb6 13.Rc1 Ne4 14.Nxb6 axb6 15.a3 f6 16.b4 Qd6 17.Nd4 Nxd4 18.Qxd4 Rfd8 19.Rfd1 Rac8 20.Rxc8 Rxc8 21.f3 Ng5 22.Qxd5+ Qxd5 23.Rxd5 Be6 24.Rd2 Nh3+ 25.Kf1 b5 26.Rd6 Rc6 27.Rxc6 bxc6 28.f4 g5 29.e3 g4 30.Bxc6 Bc4+ 31.Kg2 Kf7 32.a4 bxa4 33.b5 Ke7 34.b6 Kd6 35.b7 Kc7 36.Bxf6 1-0
2026.05.26 Titled Tue 26th May 2026
2280209 CM Derr, Oleg (2194) WFM Khusnitdinova, Husnorakhon (1922) 1-0
1.b3 e5 2.Bb2 Nc6 3.c4 Nf6 4.Nf3 d6 5.g3 Be7 6.Bg2 O-O 7.O-O Bg4 8.d4 exd4 9.Nxd4 Nxd4 10.Bxd4 c6 11.Nc3 h6 12.Qd2 Qd7 13.Rad1 Bh3 14.Bxf6 Bxf6 15.Ne4 Be7 16.Nxd6 Bxg2 17.Kxg2 Rad8 18.Ne4 Qe6 19.Qf4 f5 20.Nc3 Bg5 21.Qf3 Bf6 22.Na4 b6 23.e3 Be5 24.Rxd8 Rxd8 25.Rd1 Rxd1 26.Qxd1 Qc8 27.Qd3 Kf7 28.Nc3 Bf6 29.Ne2 g5 30.e4 fxe4 31.Qxe4 c5 32.Qd5+ Kg7 33.f4 g4 34.f5 Qe8 35.Nf4 Be5 36.Qe6 Qxe6 37.Nxe6+ Kf6 38.Nd8 a6 39.Nc6 Kxf5 40.Kf2 a5 41.Ke3 Bg7 42.a4 Ke6 43.Ke4 h5 44.Nd8+ Kd7 45.Nf7 Bd4 46.Nh6 Bg1 47.Nf5 Bxh2 48.Kd5 Bg1 49.Ng7 Bf2 50.Nxh5 Be1 51.Ke5 Bf2 52.Kf5 Bd4 53.Kxg4 Ke6 54.Kg5 Kf7 55.Kf5 Bf2 56.g4 Be3 57.g5 Kg8 58.g6 Bd4 59.Ke6 Bc3 60.Kd6 Bd4 61.Kc6 1-0
2026.05.26 Titled Tue 26th May 2026
2279493 CM Derr, Oleg (2194) CM Boutikos, Eleftherios (2189) 0-1
1.b3 d5 2.Bb2 c6 3.Nf3 Bf5 4.g3 e6 5.Bg2 h6 6.d3 Nf6 7.O-O Be7 8.Nbd2 O-O 9.Re1 a5 10.e4 Bh7 11.a4 Na6 12.Qe2 Rc8 13.e5 Nd7 14.h4 c5 15.Nf1 c4 16.dxc4 dxc4 17.Ne3 cxb3 18.cxb3 Nb4 19.Red1 Qe8 20.Rac1 Nc5 21.Nd4 Ncd3 22.Rxc8 Qxc8 23.Nc4 Nxb2 24.Qxb2 Rd8 25.Qe2 Bc5 26.Nb5 Bd3 27.Qf3 Bc2 28.Rxd8+ Qxd8 29.Nbd6 Qc7 30.Nxb7 Nd3 31.Nxc5 Qxc5 32.Qa8+ Kh7 33.Ne3 Nxe5 34.Nxc2 Ng4 35.Qf3 f5 36.Ne3 Qc1+ 37.Bf1 Ne5 38.Qf4 Qc3 39.Nc4 Ng6 40.Qd6 Qe1 41.Qb6 f4 42.Qxa5 Qe4 43.h5 Ne7 44.Qd8 Nf5 45.Bd3 Qe1+ 46.Kg2 fxg3 47.Bxf5+ exf5 48.fxg3 Qe2+ 49.Kh3 Qxh5+ 50.Kg2 Qe2+ 51.Kh3 Qe6 0-1
2026.05.26 Titled Tue 26th May 2026
2279751 Furman, Eugene CM Derr, Oleg (2194) 1-0
1.c4 e6 2.Nc3 d5 3.cxd5 exd5 4.d4 Nf6 5.Nf3 c6 6.Bg5 h6 7.Bh4 Be7 8.e3 Bf5 9.Bd3 Bxd3 10.Qxd3 O-O 11.O-O Nbd7 12.h3 Ne4 13.Bxe7 Qxe7 14.Rfe1 f5 15.Nd2 Rae8 16.f3 Nd6 17.b4 Qh4 18.f4 g5 19.Nf3 Qg3 20.Ne2 1-0
2026.05.26 Titled Tue 26th May 2026
2280065 CM Derr, Oleg (2194) CM Winkels, M (1914) 0-1
1.b3 a5 2.Nf3 a4 3.g3 e6 4.Bb2 a3 5.Bc3 d5 6.Bg2 c5 7.e3 Nc6 8.d4 Nf6 9.O-O Ne4 10.Be1 Be7 11.Nc3 cxd4 12.Nxe4 dxe4 13.Nxd4 Nxd4 14.exd4 f5 15.c4 Bf6 16.Bc3 O-O 17.Qd2 b6 18.Rad1 Bb7 19.Qe2 Qe7 20.f3 exf3 21.Bxf3 Bxf3 22.Rxf3 Rad8 23.Re3 Rfe8 24.Re1 Qd7 25.Rxe6 Rxe6 26.Qxe6+ Qxe6 27.Rxe6 Bxd4+ 28.Bxd4 Rxd4 29.Rxb6 Rd1+ 30.Kg2 Rd2+ 31.Kh3 Rxa2 32.c5 Kf7 33.c6 Ke7 34.Ra6 Kd6 35.b4 g5 36.b5 h5 37.g4 hxg4+ 38.Kg3 Ra1 39.Kg2 f4 40.Ra7 a2 41.c7 Kd7 42.b6 f3+ 43.Kf2 Rh1 44.Ra8 Rxh2+ 45.Ke3 Re2+ 46.Kd4 Rc2 47.b7 a1=Q+ 48.Rxa1 Kxc7 49.Rb1 Kb8 50.Ke4 Re2+ 0-1
2026.05.26 Titled Tue 26th May 2026
2279316 CM Derr, Oleg (2194) CM Bregnac, Tristan (2204) 0-1
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.O-O-O d5 10.Nxc6 bxc6 11.Bc4 e6 12.Bb3 Qc7 13.Na4 Rd8 14.h4 Ba6 15.Nc5 Bb5 16.Qf2 dxe4 17.a4 exf3 18.gxf3 Qe5 19.c3 a5 20.axb5 a4 21.Rxd8+ Rxd8 22.Bxa4 cxb5 23.Bb3 Ra8 24.Kb1 Qf5+ 25.Bc2 Qd5 26.Nb3 Ng4 27.Qe2 Nf6 28.Rd1 Qc6 29.Bc5 Qa6 30.Ba3 Nd5 31.Rxd5 exd5 32.Nc5 Qc6 33.Bd3 Rxa3 34.bxa3 Qxc5 35.Qe8+ Bf8 36.Qxb5 Qxc3 37.Qxd5 Bxa3 38.Qb5 Kg7 39.h5 Be7 40.hxg6 hxg6 41.Qc4 Qe1+ 42.Qc1 Qa5 43.Qb2+ Bf6 44.Qb3 Qe1+ 45.Kc2 Qf2+ 46.Kb1 Qd2 47.Be4 g5 48.Qb5 Qd1+ 0-1
2026.05.26 Titled Tue 26th May 2026
2279114 IM Czopor, Maciej (2458) CM Derr, Oleg (2194) 1-0
1.c4 e6 2.Nf3 Nf6 3.b3 d5 4.Bb2 Bd6 5.e3 O-O 6.g3 c5 7.Bg2 Nc6 8.O-O d4 9.exd4 cxd4 10.Nxd4 Nxd4 11.Bxd4 Bxg3 12.Bc3 Bf4 13.d4 e5 14.dxe5 Ng4 15.Qxd8 Rxd8 16.h3 Nxe5 17.Na3 Bf5 18.Rad1 Rab8 19.Nb5 a6 20.Nd6 Nf3+ 21.Bxf3 Bxd6 22.Kg2 Bf4 23.Ba5 Rxd1 24.Rxd1 g5 25.Rd8+ Rxd8 26.Bxd8 Bc8 27.Bf6 h6 28.Bd5 Kh7 29.Bxf7 Bf5 30.Bd5 b6 31.Bd8 Bb1 32.Bxb6 Bxa2 33.c5 Kg6 34.c6 Bb1 35.c7 Bf5 36.Bb7 Bxc7 37.Bxc7 Bc2 38.b4 Bd3 39.Be5 Kf5 40.Bg7 h5 41.Bf8 Bc4 42.Bc5 Bd3 43.Be3 Bc4 44.Bc8+ Kg6 45.Kf3 Bd3 46.Bd4 Bb5 47.Ke4 Bc6+ 48.Ke5 Bb5 49.Bf5+ Kh6 50.Kf6 Bf1 51.Be3 h4 52.Bxg5+ Kh5 53.Bg4# 1-0
2026.05.26 Titled Tue 26th May 2026
2280404 WFM Lakshmi, C (1957) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 g6 7.N1c3 a6 8.Na3 Bg7 9.Be3 Nf6 10.f3 O-O 11.Be2 Be6 12.O-O Rc8 13.Qd2 Nh5 14.Rfd1 Nd4 15.Bf1 Nf4 16.Kh1 h5 17.b3 Qa5 18.Nd5 Qxd2 19.Rxd2 Nxd5 20.cxd5 Bd7 21.Nc4 Rc7 22.Bxd4 exd4 23.Nxd6 b5 24.f4 Rb8 25.e5 f6 26.Re1 Bg4 27.h3 Bc8 28.Rxd4 fxe5 29.fxe5 Rd7 30.Rde4 Bb7 31.Nxb7 Rdxb7 32.d6 Re8 33.e6 Bf6 34.g4 hxg4 35.Rxg4 Kg7 36.Bd3 Rh8 37.Rxg6+ Kf8 38.Rxf6+ Ke8 39.Kh2 Rxh3+ 40.Kxh3 Rg7 41.Ref1 1-0
2026.05.26 Titled Tue 26th May 2026
2279677 WCM Jannur, Kupjasar (1994) CM Derr, Oleg (2194) 1-0
1.d4 Nf6 2.Bf4 e6 3.e3 c5 4.Nf3 cxd4 5.exd4 b6 6.c4 Bb7 7.Be2 Be7 8.O-O O-O 9.Nc3 d5 10.cxd5 Nxd5 11.Nxd5 Bxd5 12.Rc1 Nc6 13.a3 Bd6 14.Bg5 Qd7 15.b4 f6 16.Be3 a5 17.Bb5 axb4 18.a4 Rfc8 19.Nd2 Qf7 20.Nc4 Bc7 21.Qd2 Qg6 22.f3 Qh5 23.Bf4 Bxf4 24.Qxf4 Na5 25.Nxb6 Rxc1 26.Rxc1 Rf8 27.Nd7 Ra8 28.Rc7 Qg6 29.Nb6 Rd8 30.Nxd5 exd5 31.Qe3 b3 32.Bd3 Qe8 33.Qd2 Nc4 34.Bxc4 dxc4 35.Rxc4 Qe6 36.Rc1 Qa6 37.a5 Qa7 38.Qc3 Rxd4 39.Qxb3+ Kf8 40.Rc8+ Ke7 41.Qe3+ Kd7 42.Qe8+ 1-0
2026.05.19 Titled Tue 19th May 2026
2273808 GM Zierk, S (2489) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.Bb5 d6 4.O-O Bd7 5.Re1 a6 6.Bf1 Bg4 7.h3 Bxf3 8.Qxf3 e6 9.c3 Nf6 10.Rd1 d5 11.d3 Be7 12.g3 O-O 13.Bg2 Rc8 14.Nd2 b5 15.a4 Qb6 16.Qe2 d4 17.e5 Nd7 18.f4 c4 19.Kh2 cxd3 20.Qxd3 Nc5 21.Qf3 dxc3 22.bxc3 Nxa4 23.Ne4 Na5 24.Be3 Qc7 25.Rac1 Nc4 26.Bd4 g6 27.h4 h5 28.Qe2 a5 29.Bf3 Kg7 30.Nd6 Rb8 31.Rb1 Nab2 32.Rxb2 Nxb2 33.Qxb2 b4 34.c4 a4 35.Ra1 Qd7 36.c5 a3 37.Qb3 Rfc8 38.Rc1 Rc6 39.Bxc6 Qxc6 40.Rc4 Qd5 41.c6 Bd8 42.Nxf7 Kg8 43.Nxd8 Rxd8 44.Qxb4 Rc8 45.c7 a2 46.Rc1 Qf3 47.Qc4 1-0
2026.05.19 Titled Tue 19th May 2026
2273305 CM Derr, Oleg (2194) GM Amin, B (2627) 1-0
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 h6 5.a4 d6 6.Nc3 Be6 7.Nd5 Bxd5 8.exd5 Ne7 9.d4 e4 10.Nd2 Nexd5 11.Nxe4 c6 12.Nxf6+ Nxf6 13.O-O Be7 14.Qf3 O-O 15.c3 d5 16.Bd3 Bd6 17.g3 Re8 18.Be3 a5 19.Rfe1 Ne4 20.Bf4 Bxf4 21.Qxf4 Qd6 22.Rxe4 dxe4 23.Qxd6 exd3 24.Rd1 1-0
2026.05.19 Titled Tue 19th May 2026
2273853 CM Derr, Oleg (2194) CM Silwal, Purushottam (1982) 0-1
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 e5 7.Nf3 Be7 8.g4 h6 9.Rg1 b5 10.g5 hxg5 11.Nxg5 Bb7 12.a4 b4 13.Nd5 Nxd5 14.exd5 Nd7 15.Bc4 Qc7 16.Bb3 Nc5 17.Qf3 Bf6 18.Ne4 Nxe4 19.Qxe4 Rxh3 20.Qxb4 Rb8 21.Qe4 Rh4 22.Qf3 e4 23.Qf5 Bc8 0-1
2026.05.19 Titled Tue 19th May 2026
2274170 Windmueller, Simon (2183) CM Derr, Oleg (2194) 1-0
1.f4 d5 2.Nf3 Nf6 3.e3 g6 4.b3 Bg7 5.Bb2 O-O 6.Be2 c5 7.O-O Nc6 8.Ne5 Nxe5 9.Bxe5 Nd7 10.Bxg7 Kxg7 11.Bf3 e6 12.Nc3 b6 13.a4 Bb7 14.Qe2 Qc7 15.g3 Rad8 16.e4 dxe4 17.Nxe4 Bxe4 18.Bxe4 Nf6 19.Bg2 Rd4 20.d3 Rfd8 21.Rfe1 a6 22.Qe5 Qxe5 23.Rxe5 Nd7 24.Re4 Nf6 25.Rxd4 cxd4 26.Bf3 Rc8 27.Ra2 a5 28.Kf2 Rc5 29.Ke2 g5 30.fxg5 Rxg5 31.Ra1 Nd5 32.Bxd5 Rxd5 33.Rf1 f5 34.Kd2 Kg6 35.Rb1 e5 36.b4 Kg5 37.bxa5 Rxa5 38.Rxb6 Rxa4 39.Rb5 Kf6 40.Rb6+ Kg5 41.Rb5 Kf6 42.h4 Ra1 43.Rb6+ Kf7 44.Rh6 e4 45.dxe4 fxe4 46.Rd6 e3+ 47.Ke2 Ra4 48.g4 Rc4 49.Kf3 Rxc2 50.Rxd4 e2 51.Re4 Rc3+ 52.Kxe2 Rh3 53.g5 Kg6 54.Kf2 Kf5 55.Ra4 Rb3 56.Kg2 Rb2+ 57.Kg3 Rb3+ 58.Kf2 Rb2+ 59.Ke3 Rb3+ 60.Kd2 Rh3 61.Rd4 Kg6 62.Rd6+ Kh5 63.Rh6+ Kg4 64.Rxh7 Kf5 65.Rf7+ Kg6 66.Rf6+ Kg7 67.Rh6 1-0
2026.05.19 Titled Tue 19th May 2026
2273471 CM Derr, Oleg (2194) GM Yakubboev, Nodirbek (2689) 0-1
1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6 6.Be3 Bf5 7.Ne2 e6 8.Ng3 Bg6 9.h4 h5 10.Be2 Bd6 11.Nxh5 Bxh5 12.Bxh5 Qa5+ 0-1
2026.05.19 Titled Tue 19th May 2026
2274269 CM Barcelo Melnyk, Marc (2158) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N5c3 Nf6 7.Bd3 Be6 8.O-O g6 9.Bg5 Bg7 10.Nd5 Bxd5 11.exd5 Ne7 12.Bb5+ Nd7 13.Qg4 a6 14.Bd3 O-O 15.c4 f5 16.Qh4 Nf6 17.Nc3 Rc8 18.Rfe1 Qb6 19.b3 e4 20.Bf1 Rf7 21.Rac1 Re8 22.h3 Nd7 23.Ne2 Be5 24.Nf4 Bxf4 25.Qxf4 Ne5 26.Qd2 Ref8 27.Be3 Qc7 28.Bd4 Qd7 29.c5 Nxd5 30.cxd6 Qxd6 31.Bxe5 Qxe5 32.Rc5 Rd8 33.Rd1 Rfd7 34.Bc4 b6 35.Rxd5 Rxd5 36.Qxd5+ Rxd5 37.Rxd5 Qf4 38.Rxf5+ 1-0
2026.05.19 Titled Tue 19th May 2026
2273252 IM Bersamina, Paulo (2423) CM Derr, Oleg (2194) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.g3 a6 7.N5c3 Nf6 8.Bg2 h5 9.h3 Be6 10.Be3 Be7 11.Nd5 Bxd5 12.exd5 Nb8 13.O-O Nbd7 14.a4 Rc8 15.a5 O-O 16.Nd2 Nc5 17.b4 Ncd7 18.c4 b5 19.axb6 Nxb6 20.Qb3 Qc7 21.Rfc1 Qb7 22.b5 axb5 23.Qxb5 Rb8 24.Rcb1 Qc8 25.Bxb6 Nd7 26.Ra6 Bd8 27.Ne4 Bxb6 28.Nxd6 Bxf2+ 29.Kxf2 Rxb5 30.Nxc8 Rxb1 31.Ne7+ Kh8 32.d6 Rb2+ 33.Kg1 Rfb8 34.Ra7 Nc5 35.d7 Rd2 36.Nd5 Rb1+ 37.Kh2 Nxd7 38.Rxd7 Rbb2 39.Ne3 Rxd7 40.c5 Rd3 41.Nc4 Rc2 42.Nxe5 Rdd2 43.Nf3 Rxg2+ 44.Kh1 Rgf2 45.Kg1 Rxf3 46.c6 Rd3 47.c7 Rd1# 0-1
2026.05.12 Titled Tue 12th May 2026
2268212 FM Fiskaaen, Martin Holten (2360) CM Derr, Oleg (2194) 1-0
1.d4 Nf6 2.Nf3 e6 3.Bf4 Be7 4.Nbd2 c5 5.e3 cxd4 6.exd4 O-O 7.Bd3 b6 8.O-O Bb7 9.h3 d6 10.Re1 Nbd7 11.a4 Re8 12.c3 Qc7 13.Bg3 a6 14.Qe2 h6 15.Nc4 Nd5 16.Ne3 Nxe3 17.Qxe3 Nf6 18.c4 Bc6 19.b4 Qb7 20.Be2 b5 21.axb5 axb5 22.c5 Nd5 23.Qd2 dxc5 24.dxc5 Bf6 25.Ne5 Ne7 26.Nxc6 Rxa1 27.Nxe7+ Qxe7 28.Rxa1 Bxa1 29.Bxb5 Rd8 30.Qe2 Qg5 31.Bd6 Qc1+ 32.Kh2 Bc3 33.Bd3 g6 34.Bxg6 Rxd6 35.cxd6 fxg6 36.Qxe6+ Kh7 37.Qf7+ Bg7 38.d7 Qd2 39.g3 Kh8 40.Kg2 1-0
2026.05.12 Titled Tue 12th May 2026
2267195 CM Boutikos, Eleftherios (2189) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.Bb5 d6 4.Bxc6+ bxc6 5.e5 Bg4 6.h3 Bh5 7.Qe2 dxe5 8.g4 Bg6 9.Nxe5 Qd5 10.O-O f6 11.Nxg6 hxg6 12.Nc3 Qd7 13.Qf3 Nh6 14.d3 Nf7 15.Bf4 e5 16.Be3 Bd6 17.Ne4 Qe7 18.Nxc5 Rc8 19.Ne4 O-O 20.Kg2 Qe6 21.Nxd6 Nxd6 22.Bc5 f5 23.Bxd6 Qxd6 24.g5 Qd8 25.h4 Qd4 26.Rh1 Qxb2 27.h5 Qd4 28.hxg6 Qg4+ 29.Qxg4 fxg4 30.Rh4 Rf4 31.Rah1 Kf8 32.Rh8+ Ke7 33.Rxc8 1-0
2026.05.12 Titled Tue 12th May 2026
2267455 CM Derr, Oleg (2194) CM Cardenas Lima Vincent Matias (1986) 0-1
1.e4 c5 2.Nf3 g6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Bg7 6.Be3 Nf6 7.Nxc6 dxc6 8.Qxd8+ Kxd8 9.O-O-O+ Ke8 10.f3 Be6 11.Na4 b6 12.Ba6 Rb8 13.Bf4 Rd8 14.Rxd8+ Kxd8 15.Rd1+ Nd7 16.Bb7 c5 17.Nc3 Bxc3 18.bxc3 Bxa2 19.Bc6 Be6 20.Kb2 Kc8 21.Bb5 Nb8 22.Be5 f6 23.Bg3 a6 24.Be2 c4 25.e5 f5 26.f4 Rd8 27.Ra1 Rd2 28.Bf3 Kc7 29.Bh4 Rd7 30.Bf2 Bd5 31.Be2 e6 32.g3 b5 33.Bc5 Bb7 34.Bd6+ Kc8 35.h4 Nc6 36.h5 Nd8 37.hxg6 hxg6 38.Re1 Nf7 39.Bc5 g5 40.Be3 g4 41.Ka3 a5 42.Kb2 Nd8 43.Ra1 a4 44.Rg1 Rh7 45.Re1 Rh3 46.Bf2 Rh2 47.Rf1 Bg2 48.Re1 Bh3 49.Bg1 Rg2 50.Ka3 Kb7 51.Kb4 Kc6 52.Bf1 Rxg3 53.Be2 Bg2 54.Rd1 Bd5 0-1
2026.05.12 Titled Tue 12th May 2026
2268531 CM Derr, Oleg (2194) FM Omariev, M (2304) 0-1
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 e6 7.g4 Nfd7 8.Bg2 Qc7 9.a4 b6 10.O-O Bb7 11.Re1 Be7 12.Be3 Nc6 13.f4 Na5 14.Qd3 Rc8 15.Bf2 Nc4 16.Nd1 O-O 17.b3 Na5 18.Rc1 Rfd8 19.Qg3 e5 20.Nf5 Bf6 21.g5 exf4 22.Qxf4 Be5 23.Qh4 Nf8 24.Be3 Re8 25.Qf2 Nd7 26.Bd4 Nxb3 27.Bxe5 Nxe5 28.Rb1 Nc5 29.Nc3 Ne6 30.Re3 Qc5 31.Rg3 Nc4 32.Nd5 Bxd5 33.exd5 Qxf2+ 34.Kxf2 Nc5 35.Rc3 Nxa4 36.Rxc4 Rxc4 37.Nxd6 Rxc2+ 38.Kg3 Re3+ 39.Kf4 Rec3 40.Be4 Rf2+ 41.Ke5 b5 42.Nb7 f6+ 43.Ke6 Re3 44.d6 Rxe4+ 45.Kd7 Rd2 46.Kc7 Rc4+ 0-1
2026.05.12 Titled Tue 12th May 2026
2267785 CM Anakok, Deniz (2062) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 g6 7.N1c3 a6 8.Na3 Bg7 9.Nd5 Nf6 10.Bg5 Be6 11.Nc2 Bxd5 12.exd5 Ne7 13.Be2 O-O 14.O-O h6 15.Be3 Nd7 16.Qd2 Kh7 17.f3 f5 18.b4 Rc8 19.Rac1 g5 20.Bd3 Nf6 21.a4 Qd7 22.b5 e4 23.fxe4 fxe4 24.Be2 Ng6 25.Nd4 Ne5 26.Ne6 Rf7 27.h3 Re8 28.Rf5 Rxe6 29.dxe6 Qxe6 30.g4 d5 31.cxd5 Nxd5 32.Rxf7 Nxf7 33.Bc4 Qe5 34.Bxd5 Qg3+ 35.Kf1 Qxh3+ 36.Ke1 Qh1+ 37.Kf2 Qf3+ 38.Kg1 Qg3+ 39.Kf1 Qh3+ 40.Qg2 Qxe3 41.Qxe4+ Qxe4 42.Bxe4+ Kg8 43.Bxb7 axb5 44.axb5 Nd6 45.Bd5+ Kf8 46.b6 Bd4 47.b7 Ba7 48.Rc8+ 1-0
2026.05.12 Titled Tue 12th May 2026
2268302 CM Derr, Oleg (2194) CM Danzer, G (2169) 1-0
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 e5 7.Nf3 h6 8.Bc4 b5 9.Bd5 Nxd5 10.Nxd5 Nd7 11.Be3 Bb7 12.O-O Rc8 13.a4 bxa4 14.Rxa4 Nc5 15.Rb4 a5 16.Rc4 Ba6 17.Bxc5 Bxc4 18.Bb6 Qd7 19.Re1 Qb5 20.Nc7+ Rxc7 21.Bxc7 Qxb2 22.Bxd6 f6 23.Bxf8 Rxf8 24.Qd6 Qb4 25.Qxb4 axb4 26.Rb1 b3 27.cxb3 Bd3 28.Re1 Ke7 29.Re3 Bc2 30.Rc3 Bxe4 31.Rc7+ Ke6 32.Rxg7 Bxf3 33.gxf3 Rb8 34.Rg6 Rxb3 35.Rxh6 Rxf3 36.Kg2 Rf5 37.Rh8 e4 38.h4 Ke5 39.h5 Kf4 40.h6 Rg5+ 41.Kf1 Kf3 42.Rf8 f5 43.h7 Rh5 44.h8=Q Rxh8 45.Rxh8 1-0
2026.05.12 Titled Tue 12th May 2026
2268050 CM Derr, Oleg (2194) CM Winkels, M (1914) 1-0
1.e4 c5 2.Nf3 Nc6 3.Nc3 d6 4.d4 cxd4 5.Nxd4 Nf6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.h4 b5 10.f3 Qb6 11.Be3 Qc7 12.g4 b4 13.Nce2 Be7 14.g5 Nh5 15.Nxc6 Bxc6 16.Bh3 d5 17.Bg4 g6 18.Bd4 O-O 19.Bxh5 gxh5 20.Nf4 dxe4 21.Nxh5 e5 22.Nf6+ Kh8 23.Be3 Rad8 24.Qf2 exf3 25.Bb6 Rxd1+ 26.Rxd1 Qb8 27.Bc5 Qc7 28.Bxe7 Qxe7 29.Qb6 Qe6 30.Qc5 Rc8 31.Rd6 Qe7 32.Qc4 Bb7 33.Qd3 e4 34.Qd4 Kg7 35.Nd5+ Kf8 36.Nxe7 Kxe7 37.Rd7+ Ke8 38.Rxb7 Rd8 39.Qh8# 1-0
2026.05.12 Titled Tue 12th May 2026
2267559 WFM Lakshmi, C (1957) CM Derr, Oleg (2194) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nf3 Nf6 6.Nc3 Bb4 7.Qd3 d5 8.exd5 Qxd5 9.Bd2 Qxd3 10.Bxd3 O-O 11.O-O-O Bg4 12.Rde1 Rfe8 13.Ng5 Rac8 14.f3 Bh5 15.a3 Ba5 16.Nce4 Bxd2+ 17.Kxd2 Nxe4+ 18.Nxe4 Bg6 19.Nd6 Bxd3 20.cxd3 Nd4 21.Nxe8 Rxe8 22.f4 f6 23.fxe5 fxe5 24.Re4 Nc6 25.b4 a6 26.a4 Rf8 27.b5 axb5 28.axb5 Nd4 29.Rxe5 Rc8 30.Rc1 Nb3+ 31.Ke3 Rxc1 32.Re7 Re1+ 0-1
2026.05.12 Titled Tue 12th May 2026
2267087 CM Derr, Oleg (2194) IM Aaditya, Dhingra (2404) 0-1
1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bc4 Bf5 8.O-O e6 9.c3 Bd6 10.Re1 O-O 11.Bg5 h6 12.Bh4 Bg4 13.h3 Bh5 14.g4 Bg6 15.Ne5 Bh7 16.Qf3 Be7 17.Bg3 Nd5 18.Bb3 a5 19.a4 Bd6 20.Rad1 Qe7 21.Re2 Kh8 22.Rde1 Rad8 23.Nc4 Bc7 24.Kg2 Rde8 25.h4 Bxg3 26.Qxg3 Bd3 27.Re3 Bxc4 28.Bxc4 Nxe3+ 29.Rxe3 Rd8 30.g5 b5 31.Ba2 c5 32.d5 c4 33.axb5 Qb7 34.Bxc4 exd5 35.Qf3 Qa8 36.Bd3 d4 37.Be4 Qb8 38.cxd4 Rxd4 39.gxh6 Qe5 40.hxg7+ Qxg7+ 41.Kh2 Qe5+ 42.Kh3 Rg8 43.Bc2 Rxh4+ 44.Kxh4 Qg5+ 0-1
2026.05.05 Titled Tue 5th May 2026
2262326 FM Zhauynbay, Alimzhan (2240) CM Derr, Oleg (2194) 0-1
1.Nf3 d5 2.g3 Nf6 3.Bg2 e6 4.O-O Bd6 5.b3 O-O 6.Bb2 Nc6 7.d3 d4 8.Nbd2 e5 9.Nc4 Re8 10.Nxd6 cxd6 11.c3 dxc3 12.Bxc3 d5 13.Rc1 d4 14.Bb2 a5 15.Nd2 Be6 16.h3 Bd5 17.Bxd5 Qxd5 18.Nc4 Rad8 19.f3 h5 20.Nd2 Qe6 21.Kg2 Nd5 22.Qe1 Ne3+ 23.Kh2 Nxf1+ 24.Qxf1 Nb4 25.a3 Nd5 26.Ne4 Rc8 27.Qe1 Ne3 28.Nc5 Qb6 29.b4 axb4 30.axb4 Qb5 31.Ne4 Rxc1 32.Bxc1 Qc6 33.Bxe3 dxe3 34.Kg2 Qc2 35.Nd6 Ra8 36.Nc4 Ra2 37.Kf1 Qa4 38.Nb6 Qa6 39.Qc3 Qxb6 40.Qc8+ Kh7 41.Qf5+ Qg6 42.Qxe5 Rc2 43.g4 hxg4 44.hxg4 Rc1+ 45.Kg2 Qh6 46.Qf5+ Kg8 47.g5 Qh1+ 48.Kg3 Qe1+ 49.Kg4 Qxb4+ 50.f4 Qb6 51.Qe4 Qe6+ 52.f5 Qxe4+ 53.dxe4 b5 54.Kf3 b4 55.Kxe3 b3 56.Kd2 b2 57.e5 b1=Q 58.e6 Rc2+ 59.Ke3 fxe6 60.f6 Qb3+ 61.Kf4 Rc4+ 62.Ke5 Rc5+ 63.Kd6 Qd5+ 64.Ke7 Rc7+ 65.Ke8 Qd7# 0-1
2026.05.05 Titled Tue 5th May 2026
2262593 CM Derr, Oleg (2194) IM Di Berardino, D (2465) 0-1
1.e4 c5 2.Nf3 b6 3.d4 cxd4 4.Nxd4 Bb7 5.Nc3 Nf6 6.e5 Nd5 7.Nxd5 Bxd5 8.Be2 Nc6 9.Bf3 Bxf3 10.Nxf3 Qc7 11.Bf4 e6 12.O-O Be7 13.c3 O-O 14.Re1 Rfd8 15.Qc2 d6 16.exd6 Bxd6 17.Bxd6 Rxd6 18.Ng5 g6 19.Qa4 Kg7 20.Qb4 Nxb4 0-1
2026.05.05 Titled Tue 5th May 2026
2262089 CM Derr, Oleg (2194) IM Vlassov, N (2322) 1-0
1.e4 Nc6 2.Nf3 d5 3.exd5 Qxd5 4.Nc3 Qa5 5.d4 Bg4 6.d5 O-O-O 7.Bd2 Nb4 8.Bc4 Bxf3 9.gxf3 Nf6 10.a3 Qc5 11.axb4 Qxc4 12.Rxa7 Nxd5 13.Ra8+ Kd7 14.Rxd8+ Kxd8 15.Nxd5 Qxd5 16.Bc3 Qxd1+ 17.Kxd1 e6 18.Rg1 Rg8 19.Ke2 g6 20.Ra1 g5 21.Ra8+ Ke7 22.b5 Rg6 23.Bb4+ Kf6 24.Rxf8 Rh6 25.Rc8 Rxh2 26.Rxc7 b6 27.Rc6 h5 28.Rxb6 g4 29.fxg4 hxg4 30.Bd6 Rh1 31.Bg3 Rb1 32.b3 Kf5 33.Rc6 1-0
2026.05.05 Titled Tue 5th May 2026
2262354 GM Gabrielian, A (2404) CM Derr, Oleg (2194) 1-0
1.Nf3 d5 2.g3 Nf6 3.Bg2 e6 4.O-O Bd6 5.d3 O-O 6.Nc3 Nc6 7.e4 dxe4 8.dxe4 e5 9.Be3 h6 10.Qe2 Be6 11.Rad1 Ng4 12.Bc1 Qe8 13.Nd5 f5 14.exf5 Bxf5 15.Nh4 Be6 16.c3 Bc5 17.Nxc7 Bxf2+ 18.Kh1 Qh5 19.Nxe6 Rf6 20.Bf3 1-0
2026.05.05 Titled Tue 5th May 2026
2261643 CM Derr, Oleg (2194) FM Khodko, Yurii N. (2316) 1-0
1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2 dxe4 5.a3 Be7 6.Nxe4 Nf6 7.Nxf6+ Bxf6 8.Be3 O-O 9.Qd2 b6 10.O-O-O Bb7 11.f3 Nd7 12.Ng3 g6 13.Ne4 Bg7 14.h4 Nf6 15.Nxf6+ Qxf6 16.Bd3 c5 17.c3 Rac8 18.Bg5 cxd4 19.Bxf6 Bxf6 20.c4 b5 21.c5 Rxc5+ 22.Kb1 a6 23.h5 Bg5 24.f4 Be7 25.Qf2 Bf6 26.Qg3 Kg7 27.hxg6 fxg6 28.Rxh7+ Kxh7 29.Qxg6+ Kh8 30.Qh7# 1-0
2026.05.05 Titled Tue 5th May 2026
2261918 GM Krysa, L (2446) CM Derr, Oleg (2194) 1/2-1/2
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 d5 7.Nf3 dxc4 8.Qxc4 b6 9.h4 Ba6 10.Qa4 Qe8 11.Qxe8 Rxe8 12.h5 h6 13.g3 c5 14.Bg2 Bb7 15.dxc5 bxc5 16.Rh4 Nbd7 17.Bd2 Rab8 18.Rc1 Bd5 19.b4 cxb4 20.Bxb4 Rec8 21.Rxc8+ Rxc8 22.Bd2 Nb6 23.Rb4 Rc2 24.Rb1 Ra2 25.Bb4 Nc4 26.Nh4 Bxg2 27.Nxg2 Nxa3 28.Bxa3 Rxa3 29.Rb8+ Kh7 30.Rb7 Kg8 31.Nf4 Ne4 32.Kf1 a5 33.Ra7 a4 34.Nd3 Ra1+ 35.Kg2 a3 36.Ne5 Nd6 37.Ra8+ Kh7 38.Ra6 a2 39.g4 g6 40.hxg6+ fxg6 41.Ra7+ Kg8 42.Nd3 Nb5 43.Ra8+ Kf7 44.Nb4 Nc3 45.Rh8 Rb1 46.Nxa2 Nxa2 47.Rxh6 Kf6 48.Rh8 Nc3 49.f3 Nxe2 50.Rf8+ Kg5 51.Kf2 Nf4 52.Rc8 e5 53.Ke3 Rb3+ 54.Kd2 Rxf3 55.Re8 Kxg4 56.Rxe5 Rf2+ 57.Kc3 Kf3 58.Re8 g5 59.Rg8 g4 60.Kd4 g3 61.Ke5 g2 62.Kf5 Rf1 63.Rxg2 Rg1 64.Ke5 Rxg2 65.Kd4 Re2 66.Kc4 Re4+ 67.Kc5 Ne2 68.Kb5 Ke3 69.Kc6 Rd4 70.Kb6 Nc3 71.Kc7 Rd5 72.Kb7 Kd4 73.Kc7 Kc5 74.Kc8 Rd6 75.Kb8 Nb5 76.Kc8 Na7+ 77.Kb8 Nc6+ 78.Kc7 Rd8 79.Kb7 Ra8 80.Kc7 1/2-1/2
2026.05.05 Titled Tue 5th May 2026
2262706 CM Karpenko, Anton (2308) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Nc4 Rb8 9.a4 Nb4 10.Ne3 Nf6 11.Be2 Be7 12.O-O O-O 13.Ncd5 Nxe4 14.Nxb4 1-0
2026.05.05 Titled Tue 5th May 2026
2261941 FM Kononenko, Dmitry2 (2119) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Ne2 Nf6 6.Nbc3 Bc5 7.Ng3 d6 8.Bc4 Ng4 9.Rf1 Nxh2 10.Qh5 O-O 11.Qxh2 Nd4 12.Bd3 Bg4 13.Rh1 h6 14.Bxh6 gxh6 15.Qxh6 1-0
2026.05.05 Titled Tue 5th May 2026
2262476 CM Derr, Oleg (2194) FM Andreasyan, Edgar (2371) 1-0
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Be7 5.a4 d6 6.c3 O-O 7.O-O Na5 8.Ba2 c5 9.b4 cxb4 10.cxb4 Nc6 11.b5 Nb4 12.Bc4 a5 13.Qb3 h6 14.Ba3 Bg4 15.Nbd2 Nd7 16.d4 exd4 17.Nxd4 Nc5 18.Qg3 Bh5 19.Nf5 Bg6 20.Qxg6 Bf6 21.Nxh6+ Kh8 22.Nxf7+ Rxf7 23.Bxf7 Bg5 24.Bb2 1-0
2026.05.05 Titled Tue 5th May 2026
2261457 IM Karttunen, M (2503) CM Derr, Oleg (2194) 1-0
1.e4 c5 2.Nf3 Nc6 3.Bb5 d6 4.O-O Bd7 5.Re1 a6 6.Bf1 Bg4 7.h3 Bxf3 8.Qxf3 e6 9.c3 Nf6 10.Qd1 d5 11.e5 Nd7 12.d4 Qb6 13.c4 Nxd4 14.cxd5 exd5 15.Nc3 Qc6 16.Be3 Ne6 17.Nxd5 Rd8 18.Nc3 Nxe5 19.Qh5 Ng6 20.f4 Be7 21.f5 Ngf4 22.Qg4 h5 23.Qg3 h4 24.Qg4 O-O 25.Bxf4 Nxf4 26.Qxf4 Bf6 27.Kh1 Qb6 28.Qf2 Bd4 29.Qc2 Qf6 30.a4 Qg5 31.Bc4 Rfe8 32.Rxe8+ Rxe8 33.Rf1 Qg3 34.Ne4 Rxe4 35.Qxe4 Be5 36.Qxe5 Qxe5 37.b3 Qd4 38.f6 gxf6 39.Kh2 Kg7 40.Rf5 Qe5+ 41.Rxe5 fxe5 42.Kg1 f6 43.Kf2 Kg6 44.Kf3 Kf5 45.Bd3+ e4+ 46.Bxe4+ Ke5 47.Bxb7 f5 48.Bxa6 Kd4 49.Bc4 Kc3 50.Kf4 Kb4 51.Kxf5 Ka5 52.Kg4 Kb4 53.Kxh4 Ka5 54.Kg4 Kb4 55.Kf5 Ka5 56.Ke4 Kb4 57.Kd5 Ka5 58.h4 Kb4 59.h5 Ka5 60.h6 Kb4 61.h7 Ka5 62.h8=Q Kb4 63.Qb8+ Ka5 64.Qb5# 1-0
2026.05.05 Titled Tue 5th May 2026
2261499 CM Derr, Oleg (2194) CM Claure Verastegui, Rene David (2085) 1-0
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 e5 7.Nf3 Be7 8.g4 h6 9.Rg1 Nc6 10.g5 hxg5 11.Nxg5 Be6 12.Nxe6 fxe6 13.Rxg7 Qa5 14.Bd2 Qc7 15.Bg5 Qa5 16.Qd2 Nd4 17.O-O-O Rc8 18.Rxe7+ Kxe7 19.Nd5+ Qxd5 20.exd5 Rxc2+ 21.Qxc2 Nxc2 22.Kxc2 exd5 23.Bxf6+ Kxf6 24.Rxd5 Ke6 25.Rd3 d5 26.Rg3 Rh7 27.Kd2 e4 28.Ke3 Rf7 29.h4 Ke5 30.Rg5+ Ke6 31.Bh3+ Kd6 32.Bg4 Kc5 33.h5 Re7 34.h6 Kc4 35.Rg7 d4+ 36.Kf4 1-0
2026.04.28 Titled Tue 28th Apr 2026
2256663 CM Derr, Oleg (2175) CM Aynaoglu, Efe (2026) 1/2-1/2
1.e4 c5 2.Nf3 g6 3.Nc3 Bg7 4.d4 cxd4 5.Nxd4 Nc6 6.Be3 Nf6 7.Nxc6 bxc6 8.e5 Ng8 9.Bd4 Qa5 10.f4 Rb8 11.Qd2 Nh6 12.Ne4 Qxd2+ 13.Kxd2 O-O 14.Bd3 d5 15.Ng5 Bf5 16.Bxa7 Rxb2 17.Rhb1 Rxb1 18.Rxb1 Ra8 19.Rb8+ Rxb8 20.Bxb8 Bxd3 21.Kxd3 Ng4 22.a4 f6 23.a5 fxe5 24.a6 e4+ 25.Ke2 Bd4 26.h3 Ne3 27.Ne6 Bb6 28.a7 Bxa7 29.Bxa7 Nxc2 30.Nd4 Nxd4+ 31.Bxd4 Kf7 32.Ke3 Ke6 33.Bc5 h5 34.g4 hxg4 35.hxg4 Kf6 36.Kd4 Ke6 37.Ba3 Kf6 38.Bc1 Ke6 39.Kc5 Kd7 40.Be3 e5 41.fxe5 Ke6 42.Bd4 e3 43.Bxe3 Kxe5 44.Kxc6 d4 45.Bc1 d3 46.Kc5 Ke4 47.Kc4 Kf3 48.g5 Ke4 49.Kc3 Ke5 50.Kxd3 Kd5 51.Bf4 Ke6 52.Ke3 Kf5 53.Kf3 Ke6 54.Kg3 Kf5 55.Be3 Ke6 56.Bf4 Kf5 57.Bd2 Ke6 58.Bf4 1/2-1/2
2026.04.28 Titled Tue 28th Apr 2026
2257188 CM Lazaro Azcutia, Miguel (2214) CM Derr, Oleg (2175) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Nc4 Rb8 9.Nd5 Bxd5 10.exd5 Nce7 11.Ne3 Nf6 12.a4 g6 13.Be2 Bg7 14.O-O O-O 15.a5 Nd7 16.Nc4 Nf6 17.Nb6 Nc8 18.c4 Nxb6 19.axb6 Qxb6 20.Rb1 Nd7 21.b4 f5 22.Be3 Qc7 23.f3 b6 24.Qa4 a5 25.Qc6 Rfc8 26.Qxc7 Rxc7 27.bxa5 bxa5 28.Rxb8+ Nxb8 29.Ra1 f4 30.Bf2 e4 31.Rxa5 e3 32.Be1 Rb7 33.Rb5 Rxb5 34.cxb5 Nd7 35.g3 g5 36.Bb4 Be5 37.gxf4 gxf4 38.Kf1 Kf7 39.Bd3 h6 40.Ke2 Nb6 41.Ba5 Bd4 42.Bxb6 Bxb6 43.Bf5 Kf6 44.Be6 Kg5 45.Bc8 Kf6 46.Be6 Ke5 47.Kd3 Kf6 48.Bc8 Ke7 49.Be6 Bc5 50.Ke2 Kd8 51.Kd3 Kc7 52.Ke2 Kb6 53.Bd7 Kc7 54.Be6 1/2-1/2
2026.04.28 Titled Tue 28th Apr 2026
2256501 FM Santos, AntonioP (2199) CM Derr, Oleg (2175) 0-1
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 dxc4 7.Bxc4 c5 8.O-O Qc7 9.Qe2 Bxc3 10.bxc3 b6 11.Bb2 Bb7 12.Rac1 Nc6 13.e4 e5 14.d5 Ne7 15.Rfd1 Rfd8 16.Bd3 Ng6 17.g3 Rac8 18.c4 Rb8 19.a4 Bc8 20.Qc2 Bg4 21.Be2 h5 22.h4 Qe7 23.Ng5 Bxe2 24.Qxe2 Rd6 25.Bc3 Ng4 26.Rf1 f6 27.Nf3 Rf8 28.Nh2 Qd7 29.Nxg4 hxg4 30.f3 gxf3 31.Qxf3 Qxa4 32.Ra1 Qd7 33.Kg2 Ne7 34.g4 Ng6 35.Kg3 Nf4 36.Bd2 g5 37.Rh1 Qg7 38.Bxf4 exf4+ 39.Kg2 Re8 40.Rae1 a6 41.hxg5 fxg5 42.Rh5 b5 0-1
2026.04.28 Titled Tue 28th Apr 2026
2255991 FM Avila Rodriguez, Joshua Adrian (2307) CM Derr, Oleg (2175) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.Bb5 d6 4.O-O Bd7 5.Re1 a6 6.Bxc6 Bxc6 7.d4 cxd4 8.Nxd4 Rc8 9.b3 Nf6 10.Nxc6 Rxc6 11.c4 b5 12.cxb5 axb5 13.Bb2 e6 14.Nc3 b4 15.Nb5 Be7 16.Qd2 O-O 17.h3 Qb6 18.Nd4 Rcc8 19.Qd3 d5 20.exd5 Nxd5 21.Nf5 exf5 22.Qxd5 Bf6 23.Bxf6 Qxf6 24.Rac1 Rxc1 25.Rxc1 Qb2 26.Rc7 Qxa2 27.Rb7 Qa3 28.g3 f4 29.gxf4 Qc1+ 30.Kg2 Qxf4 31.Rd7 h6 32.Rb7 Rc8 33.Qf3 Qg5+ 34.Kh2 Rc1 35.Qg4 Qe5+ 36.Qg3 Qe4 37.Rb8+ Kh7 38.Qg2 Qe5+ 39.Qg3 Qd5 40.Qg2 Qe5+ 41.Qg3 Qd5 42.Qg2 Qe5+ 1/2-1/2
2026.04.28 Titled Tue 28th Apr 2026
2257021 CM Derr, Oleg (2175) Lukachewski Junior, Wanderlei (2046) 1-0
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Bc5 5.a4 a6 6.O-O d6 7.Be3 Ba7 8.Nbd2 Be6 9.Bxa7 Rxa7 10.c3 O-O 11.b4 d5 12.exd5 Nxd5 13.Qb3 Nf4 14.Bxe6 Nxe6 15.b5 axb5 16.axb5 Na5 17.Qc2 f6 18.Nb3 b6 19.Nxa5 bxa5 20.Qb3 Qd6 21.d4 e4 22.Nd2 f5 23.Nc4 Qd5 24.Nxa5 Qxb3 25.Nxb3 Rfa8 26.Rxa7 Rxa7 27.Rb1 Nf4 28.Kf1 Ra3 29.c4 Ra2 30.c5 Kf7 31.b6 cxb6 32.cxb6 Ra8 33.b7 Rb8 34.Nc5 1-0
2026.04.28 Titled Tue 28th Apr 2026
2256299 CM Derr, Oleg (2175) FM Grahn, Vidar (2219) 0-1
1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3 Nxc3 6.dxc3 Be7 7.Be3 Be6 8.Bd3 c5 9.Qe2 Nc6 10.O-O-O Qa5 11.Bc4 O-O-O 12.Bxe6+ fxe6 13.Kb1 Bf6 14.Bf4 e5 15.Bc1 d5 16.Ng5 Rd7 17.Qg4 d4 18.Ne6 Re8 19.Rhe1 Nd8 20.Ng5 h6 21.Ne4 Ne6 22.cxd4 cxd4 23.Nxf6 gxf6 24.Bxh6 Kb8 25.f4 d3 26.cxd3 Rd4 27.Qh5 Red8 28.fxe5 Rxd3 29.Bc1 Qb5 30.Rxd3 Qxd3+ 31.Ka1 Nd4 32.a3 Nc2+ 33.Ka2 Nxe1 34.exf6 Qc4+ 35.Kb1 Qc2+ 36.Ka2 Qxc1 37.Qe5+ Ka8 38.f7 Qc4+ 39.b3 Rd2+ 40.Kb1 Qc2+ 41.Ka1 Qa2# 0-1
2026.04.28 Titled Tue 28th Apr 2026
2256836 Barmagambetov, Meyrzhan (2022) CM Derr, Oleg (2175) 1-0
1.d4 Nf6 2.Nf3 e6 3.c4 b6 4.Bf4 Bb7 5.a3 d5 6.e3 Be7 7.Nc3 O-O 8.h3 c5 9.Bd3 cxd4 10.exd4 dxc4 11.Bxc4 Nc6 12.O-O Na5 13.Bd3 Rc8 14.Rc1 Nc4 15.Rc2 h6 16.Ne5 Nxb2 17.Rxb2 Rxc3 18.a4 Qd5 19.Nf3 Rfc8 20.Re1 Qh5 21.Be2 Qd5 22.Bd3 Ba3 23.Rb5 Qd7 24.Ne5 Qe8 25.Rb3 Nd5 26.Bd2 Rxb3 27.Qxb3 Bd6 28.Bb1 Nf6 29.Qd3 Qxa4 30.Ng4 Nxg4 31.hxg4 g6 32.Bxh6 Qc6 33.Qh3 Bf8 34.Be3 Bg7 35.g5 a5 36.Bf4 a4 37.Bxg6 fxg6 38.Rxe6 Qd7 39.Qe3 Qd5 40.Qh3 Rc3 41.Be3 Rb3 42.Re8+ Kf7 43.Re5 Bxe5 44.dxe5 Qd1+ 45.Kh2 Rb1 46.e6+ Ke7 47.Qh7+ Kxe6 48.Qxg6+ Kd5 49.Qf7+ 1-0
2026.04.28 Titled Tue 28th Apr 2026
2256865 FM Yoganathan, Sakithyan (2230) CM Derr, Oleg (2175) 1-0
1.Nf3 d5 2.g3 Nf6 3.Bg2 e6 4.O-O Bd6 5.d3 O-O 6.Nbd2 Nc6 7.e4 dxe4 8.dxe4 e5 9.Nc4 Nxe4 10.Nfxe5 Nxe5 11.Nxe5 Bxe5 12.Bxe4 Qf6 13.c3 c6 14.f4 Bc7 15.Qf3 Bf5 16.Bxf5 Qxf5 17.Be3 Rfe8 18.Bd4 Rad8 19.Rae1 Qc2 20.Qg4 Qg6 21.Rxe8+ Rxe8 22.Qd7 f6 23.Qxc7 Re2 24.Qc8+ Kf7 25.Qxb7+ Kg8 26.Qxc6 Qc2 27.Qc8+ Kf7 28.Qc7+ Kg6 29.f5+ Kh5 30.g4+ Kxg4 31.Qg3+ Kh5 32.Qh3+ Kg5 33.Be3+ Rxe3 34.Qxe3+ Kh5 35.Qh3+ Kg5 36.Qg2+ 1-0
2026.04.28 Titled Tue 28th Apr 2026
2256109 FM Hakobyan, Menua (2278) CM Derr, Oleg (2175) 1-0
1.d4 Nf6 2.Nc3 d5 3.Bf4 Bd7 4.e3 e6 5.Nf3 c5 6.Ne5 a6 7.g4 cxd4 8.exd4 Bb4 9.Bg2 Qa5 10.O-O Nc6 11.g5 Ng8 12.Nxd7 Kxd7 13.Ne2 Nge7 14.c3 Bd6 15.b4 Qc7 16.Bxd6 Qxd6 17.Qd2 h6 18.Ng3 hxg5 19.Qxg5 Rag8 20.Rae1 f6 21.Qe3 f5 22.Qg5 f4 23.Nh5 f3 24.Bh3 Rh6 25.Nf4 Nd8 26.Qg4 Rgh8 27.Re5 g5 28.Qxg5 Rg8 29.Qxg8 Nxg8 30.Rxd5 Qxd5 31.Nxd5 Rxh3 32.Nf4 Rh4 33.Nd3 Rg4+ 34.Kh1 Nf6 35.Ne5+ Kd6 36.Nxg4 Nxg4 37.h3 Nf6 38.Re1 Nf7 39.Re3 Ng5 40.h4 Nge4 41.Rxf3 Kd5 42.Kg2 Ng4 43.h5 1-0
2026.04.21 Titled Tue 21st Apr 2026
2251291 CM Derr, Oleg (2175) CM Zepeda Berlanga, Jan Enrique (2018) 1-0
1.e4 c5 2.Nf3 Nc6 3.Nc3 e6 4.d4 cxd4 5.Nxd4 Nf6 6.Qd3 Bc5 7.Nxc6 bxc6 8.e5 Nd5 9.Ne4 Be7 10.a3 Qc7 11.f4 c5 12.c4 Nb6 13.g3 Bb7 14.Bg2 O-O 15.O-O f5 16.Nd6 Bxg2 17.Kxg2 Bxd6 18.exd6 Qc6+ 19.Kg1 Rae8 20.Re1 Nc8 21.Rd1 e5 22.Qd5+ Qxd5 23.Rxd5 exf4 24.Bxf4 Re2 25.Rxc5 Rxb2 26.Rc7 Re8 27.Rxd7 Ree2 28.Rd8+ Kf7 29.Rxc8 Rg2+ 30.Kf1 Rgf2+ 31.Ke1 Rfe2+ 32.Kd1 Rxh2 33.Rc7+ Kf6 34.Re7 g5 35.Be5+ Kg6 36.Bxb2 1-0
2026.04.21 Titled Tue 21st Apr 2026
2251552 WFM Swara Lakshmi S Nair (2106) CM Derr, Oleg (2175) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Ne2 Nf6 6.Nbc3 Bc5 7.Ng3 d6 8.Na4 Bb4+ 9.c3 Ba5 10.b4 Bc7 11.Bc4 O-O 12.O-O a6 13.Nb2 b5 14.Bb3 Ne7 15.Nd3 Bb7 16.Qe2 Bb6 17.Bg5 Ng6 18.Nf5 h6 19.Be3 Bxe4 20.Ng3 Bc6 21.Rad1 Rc8 22.Bxb6 Qxb6 23.Nf5 Rcd8 24.Nb2 d5 25.Nd3 Ne4 26.Qg4 Nxc3 27.Rc1 Ne4 28.Nxe5 Bb7 29.Nf3 Rc8 30.Rcd1 Nf6 31.Qg3 Rc3 32.h4 Re8 33.Rfe1 Ne4 34.Rxe4 dxe4 35.Rd7 Rf8 36.h5 exf3 37.hxg6 Qf6 38.Ne3 Rc1+ 39.Kh2 fxg2 40.Nxg2 Bxg2 41.Rxf7 Rh1+ 42.Kxg2 Qc6+ 43.Rf3+ Kh8 44.Kxh1 Rxf3 45.Qg2 Rf8 46.Qxc6 h5 47.Qd6 h4 48.Qxf8# 1-0
2026.04.21 Titled Tue 21st Apr 2026
2251821 WIM Fernandez, Maria (2183) CM Derr, Oleg (2175) 1-0
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3 c5 5.d5 b5 6.a3 Bxc3+ 7.bxc3 bxc4 8.e4 Qa5 9.Ne2 O-O 10.Bg5 Ba6 11.Bxf6 gxf6 12.Qd2 exd5 13.exd5 d6 14.h4 Nd7 15.Rh3 Rfe8 16.h5 h6 17.Kf2 Kh7 18.Qf4 Re5 19.Rg3 Qd8 20.Rg4 f5 21.Rg3 Nf6 22.Rh3 Nxd5 23.Qd2 Qe7 24.Nf4 Nxf4 25.Qxf4 Re8 26.Rg3 Qf6 27.Kg1 Re3 28.Rd1 Rxc3 29.Rxd6 Qe5 30.Rxh6# 1-0
2026.04.21 Titled Tue 21st Apr 2026
2251069 Clawitter, C (2050) CM Derr, Oleg (2175) 1-0
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Nc4 Rb8 9.Ne3 Nf6 10.Bd3 g6 11.Ncd5 Bg7 12.O-O O-O 13.c3 Bxd5 14.exd5 Ne7 15.c4 Nd7 16.Kh1 f5 17.f4 Nc5 18.Be2 Ne4 19.Nc2 Rc8 20.Be3 exf4 21.Bd4 Be5 22.Bd3 Qd7 23.Qe2 Nc5 24.b3 g5 25.Rad1 Ng6 26.Qh5 Qg7 27.Bxc5 Rxc5 28.Qxg5 b5 29.Bxf5 bxc4 30.b4 Rc7 31.Ne1 c3 32.Bc2 Bf6 33.Qh5 Kh8 34.Nd3 Nh4 35.Nxf4 Be5 36.Qxh4 Kg8 37.Ne6 Rf4 38.Qd8+ Kf7 39.Nxg7 Rxf1+ 40.Rxf1+ Kxg7 41.Qxc7+ Kh6 42.Qc6 Kg5 43.Qc4 Bf4 44.Qxa6 Kh6 45.Qc6 Kg5 46.Rxf4 Kxf4 47.Qxc3 1-0
2026.04.21 Titled Tue 21st Apr 2026
2250305 CM Derr, Oleg (2175) CM Tsepilov, Artem Den (2012) 0-1
1.e4 c5 2.Nf3 g6 3.Nc3 Bg7 4.d4 cxd4 5.Nxd4 Nc6 6.Be3 Nf6 7.Nxc6 bxc6 8.e5 Ng8 9.Bd4 Rb8 10.Bc4 Qa5 11.f4 Rxb2 12.Qd2 Rb4 13.Bb3 d5 14.O-O e6 15.Rad1 Ne7 16.Ne4 dxe4 17.Bc3 Qb6+ 18.Kh1 Rxb3 19.Ba5 O-O 20.axb3 Qb5 21.Bc7 Nf5 22.Rfe1 e3 23.Qd3 Qxd3 24.Rxd3 h5 25.c4 h4 26.g3 hxg3 27.hxg3 Nxg3+ 28.Kg2 Nf5 29.Bb8 Bh6 30.Kf3 Bb7 31.Bxa7 c5+ 32.Kg4 Rc8 33.Rd7 Be4 34.b4 cxb4 35.Bxe3 b3 36.Bc1 Bc6 37.Ra7 Nd4 38.Ra6 Bf3+ 39.Kg3 Be2 40.Ra7 Bxc4 41.Rh1 Nc2 0-1
2026.04.21 Titled Tue 21st Apr 2026
2251592 CM Derr, Oleg (2175) WIM Romany, Joy (1945) 1-0
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 h6 5.a4 a6 6.Nc3 d6 7.h3 Be6 8.Nd5 Qd7 9.Be3 Na5 10.Ba2 c6 11.Nb6 Qd8 12.Nxa8 Qxa8 13.b4 d5 14.bxa5 dxe4 15.dxe4 Nxe4 16.O-O Be7 17.Bxe6 fxe6 18.Nxe5 O-O 19.Qg4 Nf6 20.Qxe6+ 1-0
2026.04.21 Titled Tue 21st Apr 2026
2250848 CM Derr, Oleg (2175) FM Lopez del Alamo, An (2121) 0-1
1.e4 c5 2.Nf3 e6 3.Bd3 Nc6 4.O-O a6 5.c3 Nge7 6.Re1 g6 7.Bc2 Bg7 8.d4 cxd4 9.cxd4 d5 10.e5 O-O 11.Nc3 Nf5 12.Bg5 f6 13.exf6 Bxf6 14.Bxf6 Qxf6 15.Bxf5 Qxf5 16.Ne2 Bd7 17.Ng3 Qf6 18.Qd2 Rae8 19.Ne5 Nxe5 20.dxe5 Qf4 21.Qe2 Bb5 22.Qe3 Qxe3 23.fxe3 Rc8 24.Rac1 Rc6 25.Rxc6 bxc6 26.Rc1 a5 27.b3 a4 28.bxa4 Bxa4 29.e4 Rb8 30.exd5 exd5 31.a3 Rb2 32.h4 Kf7 33.h5 Ke6 34.hxg6 hxg6 35.Nf1 Kxe5 36.Ne3 Bb5 37.Ra1 d4 38.Nd1 Rb3 39.a4 Ba6 40.a5 Kd5 41.Nf2 c5 42.Ng4 c4 43.Nf6+ Ke5 44.Nd7+ Kd6 45.Nb6 c3 46.Rd1 Kc5 0-1
2026.04.21 Titled Tue 21st Apr 2026
2250351 FM Demchenko, Yaroslav (2303) CM Derr, Oleg (2175) 1-0
1.Nf3 Nf6 2.b3 g6 3.Bb2 Bg7 4.d4 O-O 5.e3 d5 6.Nbd2 c5 7.dxc5 Nc6 8.a3 a5 9.Bb5 Nd7 10.Bxg7 Kxg7 11.b4 axb4 12.axb4 Rxa1 13.Qxa1+ f6 14.Bxc6 bxc6 15.Nd4 Ne5 16.O-O Qc7 17.h3 Nf7 18.Qa5 Qxa5 19.bxa5 Bd7 20.Rb1 e5 21.Rb7 Rd8 22.a6 exd4 23.a7 dxe3 24.fxe3 Ra8 25.Rxd7 Kg8 26.Rb7 Ne5 27.Rb8+ 1-0
2026.04.21 Titled Tue 21st Apr 2026
2250105 CM Derr, Oleg (2175) FM Kononenko, Dmitry2 (2119) 0-1
1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Bd2 c6 6.h3 Qc7 7.Nf3 Bf5 8.g4 Bg6 9.Bg2 e6 10.Ne5 Nbd7 11.Bf4 Bd6 12.Qe2 Nd5 13.Nxd5 cxd5 14.O-O Bxe5 15.dxe5 Qxc2 16.Qb5 Qc6 17.Qb4 Qb6 18.Qa3 Qc5 19.Qb3 O-O 20.Rac1 Qb6 21.Qxb6 axb6 22.Rc7 Nc5 23.b4 Nd3 24.Be3 Rxa2 25.Rxb7 Nxb4 26.Bxb6 Rc8 27.Bc5 Nc6 28.Bd6 h5 29.Rc1 hxg4 30.hxg4 Rc2 31.Ra1 Nd4 32.Rb8 Rxb8 33.Bxb8 Ne2+ 34.Kh2 Nf4 35.Kg3 Nd3 36.Ra8 Kh7 37.f4 Rc3 38.Ra4 Nxe5+ 39.Kh4 Nf3+ 40.Bxf3 Rxf3 41.Be5 f6 42.Bd6 Be4 43.Ra7 Kg8 44.Ra8+ Kh7 45.Ra7 d4 46.Bf8 Kg8 47.Bxg7 Rxf4 48.Bxf6 Rxf6 49.Kg5 Rg6+ 0-1
2026.04.21 Titled Tue 21st Apr 2026
2250635 CM Tamizh Amudhan S (1953) CM Derr, Oleg (2175) 1-0
1.e4 c5 2.Nf3 Nc6 3.Bb5 d6 4.O-O Bd7 5.c3 a6 6.Bxc6 Bxc6 7.Re1 Nf6 8.e5 dxe5 9.Nxe5 Qd5 10.Nxc6 Qxc6 11.d4 e6 12.Be3 cxd4 13.Bxd4 Be7 14.Nd2 O-O 15.Bxf6 Bxf6 16.Ne4 Be7 17.Re3 Rfd8 18.Qh5 Rd5 19.Qh3 Rad8 20.Rae1 Rd1 21.Qf3 Rxe1+ 22.Rxe1 f5 23.Ng3 Qxf3 24.gxf3 Kf7 25.Re2 Rd1+ 26.Kg2 Bd6 27.Nf1 Bf4 28.Ne3 Ra1 29.a3 b5 30.Nc2 Rb1 31.Nd4 Bc1 32.Rxe6 Bxb2 33.Rxa6 Bxc3 34.Nxf5 Rb2 35.Rb6 Be1 36.Kf1 Bxf2 37.Rxb5 Ra2 38.Rb7+ Kf6 39.Nxg7 Bd4 40.Nh5+ Kg5 41.Rb5+ Kh6 42.Ng3 Ba7 43.Ra5 Bb8 44.Ra8 Bf4 45.Ra6+ Kg5 46.Ne4+ Kh4 47.Rf6 Ra1+ 48.Ke2 Ra2+ 49.Kd3 Be5 50.Rh6# 1-0
2026.01.06 36th Staufer-Open 2025
2154318 Derr, Oleg (2142) GM Velicka, P (2344) 1/2-1/2
1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Qf3 e6 6.Ne2 Nd7 7.N2g3 Bg6 8.h4 Ngf6 9.h5 Bxe4 10.Nxe4 Nxe4 11.Qxe4 Nf6 12.Qd3 Qc7 13.Bg5 Be7 14.a3 O-O-O 15.h6 g6 16.O-O-O Ng4 17.Bxe7 Qxe7 18.Qg3 Nf6 19.Be2 Rd7 20.c3 Nd5 21.Qe5 Qf6 22.g3 Rhd8 23.f4 Qe7 24.Bf3 Qf8 25.Rh2 Nc7 1/2-1/2
2026.01.05 36th Staufer-Open 2025
2146641 Derr, Oleg (2142) FM Neukirchner, Pascal (2340) 0-1
1.e4 c5 2.Nf3 Nc6 3.Nc3 g6 4.d4 cxd4 5.Nxd4 Bg7 6.Be3 Nf6 7.Nxc6 bxc6 8.e5 Ng8 9.Bd4 Qa5 10.f4 Rb8 11.Qd2 Rxb2 12.Ne4 Qxd2+ 13.Kxd2 Rb4 14.c4 f5 15.Kc3 Rb8 16.Nd2 d6 17.c5 dxe5 18.fxe5 Be6 19.Bc4 Bxc4 20.Nxc4 Nh6 21.Rab1 O-O 22.Na5 Rbc8 23.Rb7 f4 24.Rf1 g5 25.e6 Bxd4+ 26.Kxd4 Nf5+ 27.Ke4 Rf6 28.Rf2 Kf8 29.g3 Ng7 30.gxf4 Nxe6 31.Rxa7 Rd8 32.Nb3 gxf4 33.h4 Rd1 34.a4 Rb1 35.Rb7 Rxb3 0-1
2026.01.03 36th Staufer-Open 2025
2146526 Derr, Oleg (2142) FM Ronge, Tim (2284) 0-1
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 d5 5.exd5 Nxd5 6.O-O Nb6 7.Bb3 Bg4 8.Re1 Qe7 9.h3 Bh5 10.Nbd2 O-O-O 11.Ne4 f6 12.Ng3 Bf7 13.Qe2 g6 14.c3 Bd5 15.Bxd5 Nxd5 16.Qc2 Qd7 17.b4 Nxc3 18.Qxc3 Bxb4 19.Qb2 Bxe1 20.Nxe1 Qd4 21.Qxd4 Rxd4 22.Be3 Rd7 23.a3 f5 24.f4 Re8 25.Kf2 g5 26.Nxf5 exf4 27.Bd2 Ne5 28.Bb4 h5 29.Rc1 Re6 30.d4 Nc6 31.Nd3 Rf6 32.Rc5 Rdf7 33.Ne7+ Rxe7 34.Rxc6 Rxc6 35.Bxe7 Rc2+ 36.Kf3 g4+ 37.hxg4 hxg4+ 38.Kxg4 Rxg2+ 39.Kxf4 Re2 40.Bb4 b6 41.Bc3 Kd7 42.Kf3 Rc2 43.Bb2 Kd6 44.Ke3 a5 45.Ke4 Kc6 46.Bc1 Kb5 47.Bh6 Re2+ 48.Kd5 Ra2 49.Bf8 c6+ 50.Ke5 Re2+ 51.Kf4 Kc4 52.Ne5+ Kd5 53.Nf3 Re4+ 54.Kg3 Re3 55.Kf2 Ke4 56.Ne5 Rc3 57.Nd7 Rf3+ 58.Ke2 Rf7 59.Nc5+ Kxd4 60.Ne6+ Kd5 0-1
2025.11.23 Heusenstamm Schloss Open
2124685 Derr, Oleg (2140) Kuerschner, Matthias (1939) 1-0
1.e4 c5 2.Nf3 Nc6 3.Nc3 g6 4.d4 cxd4 5.Nxd4 Bg7 6.Be3 Nf6 7.Nxc6 bxc6 8.e5 Ng8 9.Bd4 Qa5 10.f4 h5 11.Bc4 Nh6 12.e6 f6 13.exd7+ Bxd7 14.Qd3 Nf5 15.O-O-O O-O-O 16.Ba6+ Kb8 17.Qc4 Be6 18.Qxc6 Bc8 19.Bxc8 Rxc8 20.Qe6 Bh6 21.g3 Qb4 22.Qe4 Rc4 23.a3 Rxd4 24.axb4 Rxe4 25.Nxe4 e5 26.Nxf6 exf4 27.gxf4 Bxf4+ 28.Kb1 Kc8 29.c4 h4 30.Rd5 h3 31.Rc5+ Kb7 32.Rb5+ Kc6 33.Nd5 Bd6 34.Ra5 Kb7 35.c5 Bb8 36.b5 g5 37.c6+ Kc8 38.c7 Bxc7 39.Rc1 Rh7 40.Rxa7 1-0
2025.11.23 Heusenstamm Schloss Open
2124750 Mandalka, Justus (2006) Derr, Oleg (2140) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 g6 7.N1c3 a6 8.Na3 Nf6 9.Be2 Be6 10.Be3 Rc8 11.O-O Bg7 12.Qd3 O-O 13.Rad1 Nd4 14.Bxd4 exd4 15.Qxd4 Nd5 16.Qd2 Nxc3 17.bxc3 Qa5 18.Qxd6 Bxc3 19.Nb1 Bb4 20.Qd4 Qxa2 21.Bd3 Bxc4 22.Bxc4 Qxc4 23.Qb6 Qxe4 24.Rd7 Rc2 25.Rd4 Ba5 26.Qf6 Qc6 27.Rd6 Qc5 28.Rd7 Rc1 29.Rdd1 Rxd1 30.Rxd1 Qc2 31.Rf1 Re8 32.h4 h5 33.Qd6 Rd8 34.Qe5 Rd1 35.Rxd1 Qxd1+ 36.Kh2 Qxb1 37.Qxa5 Qb3 38.g3 Qb5 39.Qd8+ Kh7 40.Qf6 Qd5 41.f3 a5 42.g4 hxg4 43.fxg4 a4 44.Qf2 a3 45.h5 Qe5+ 46.Kh3 Qc3+ 47.Kh4 Kg7 48.g5 gxh5 49.Qf5 a2 50.Qg6+ Kf8 51.Qd6+ Kg8 52.g6 Qc4+ 53.Kg3 a1=Q 0-1
2025.11.22 Heusenstamm Schloss Open
2124597 Mueller, Maximilian (1991) Derr, Oleg (2140) 1/2-1/2
1.e4 c5 2.Nf3 Nc6 3.Bb5 d6 4.O-O Bd7 5.Re1 a6 6.Bf1 Bg4 7.c3 Nf6 8.h3 Bxf3 9.Qxf3 e6 10.d3 Be7 11.Be3 O-O 12.Nd2 d5 13.Nb3 d4 14.cxd4 cxd4 15.Bd2 Rc8 16.e5 Nd7 17.Qg3 Bh4 18.Qf4 h6 19.Nxd4 Ncxe5 20.Bc3 Bf6 21.Rad1 b5 22.Be2 Qb6 23.Nb3 Ng6 24.Qb4 Rfd8 25.Bf3 Nge5 26.Be4 Nc6 27.Bxc6 Rxc6 28.Na5 Rcc8 29.d4 Nb8 30.a4 Nc6 31.Nxc6 Rxc6 32.axb5 axb5 33.d5 exd5 34.Rxd5 Bxc3 35.Rxd8+ Qxd8 36.bxc3 Qf6 37.Re8+ Kh7 38.Qe4+ Qg6 39.Qe5 1/2-1/2
2025.11.22 Heusenstamm Schloss Open
2124503 Derr, Oleg (2140) Villwock, M (2041) 0-1
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Qc7 7.Be2 b6 8.O-O Bb7 9.Nd5 exd5 10.exd5 d6 11.Re1 Be7 12.Bd3 O-O 13.Bg5 Bd8 14.Qf3 Nbd7 15.Qh3 g6 16.Bh6 Ne5 17.Bxf8 Kxf8 18.Rad1 Kg7 19.f4 Bc8 20.Qg3 Nxd3 21.Qxd3 Qc5 22.h3 Bd7 23.Kh1 b5 24.b3 bxc4 25.bxc4 Rb8 26.Re2 Nh5 27.Nb3 Qa3 28.Qd4+ Bf6 29.Qf2 Rxb3 30.axb3 Qxb3 31.Red2 Ng3+ 32.Kh2 Ne4 33.Qa7 Qg3+ 34.Kh1 Nxd2 35.Qxd7 Nf3 36.gxf3 Qxf3+ 37.Kh2 Qe2+ 38.Kg3 h5 39.Rb1 h4# 0-1
2025.11.21 Heusenstamm Schloss Open
2101877 Derr, Oleg (2140) GM Bagrationi, A (2416) 0-1
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 Bd7 7.Nxc6 bxc6 8.Bc4 e6 9.Qe2 Be7 10.O-O-O Qc7 11.Kb1 h6 12.Bf4 e5 13.Bc1 Rb8 14.f3 Be6 15.g4 Qa5 16.Ka1 d5 17.exd5 cxd5 18.Bxd5 Nxd5 19.Qxe5 Rd8 20.Rhe1 O-O 21.Nxd5 Rxd5 22.Rxd5 Bxd5 23.c4 Bb4 0-1
2025.11.21 Heusenstamm Schloss Open
2124425 Mueller, Mark (1995) Derr, Oleg (2140) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Be2 Nf6 9.Bg5 Be7 10.Bxf6 Bxf6 11.Nc4 Nd4 12.Ne3 Rc8 13.O-O O-O 14.Qd3 Bg5 15.Ncd1 b5 16.c3 Bc4 17.Qxc4 bxc4 18.cxd4 exd4 19.Nxc4 d5 20.exd5 d3 21.Bxd3 Qxd5 0-1
2025.11.20 Heusenstamm Schloss Open
2124263 Gundel, Julian (1894) Derr, Oleg (2140) 0-1
1.Nf3 Nf6 2.b3 g6 3.Bb2 Bg7 4.e3 b6 5.d4 Bb7 6.Be2 O-O 7.O-O c5 8.c4 cxd4 9.Nxd4 Nc6 10.Bf3 Qc8 11.Nd2 Ne5 12.Bxb7 Qxb7 13.N2f3 d6 14.Nxe5 dxe5 15.Qf3 e4 16.Qe2 Nd7 17.b4 Rac8 18.c5 Ne5 19.Rac1 Rfd8 20.Rfd1 Nd3 21.Rc2 Rd7 22.f3 Rcd8 23.Nc6 Nf4 24.exf4 Rxd1+ 25.Kf2 exf3 26.gxf3 Bxb2 27.Rxb2 R8d7 28.Nxe7+ Kf8 29.Qe5 Rf1+ 30.Kg3 Qxf3+ 31.Kh4 Qxf4+ 0-1
2025.10.19 Marburger Schachtage 2025
2149152 Diedrichs, Ralf Christian (1899) Derr, Oleg (2116) 1/2-1/2
1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 cxd4 5.Nf3 Nc6 6.Bc4 Nb6 7.Bb3 d5 8.exd6 Qxd6 9.cxd4 Be6 10.Bxe6 Qxe6+ 11.Be3 Nd5 12.Qd2 g6 13.O-O Nxe3 14.fxe3 Bh6 15.Re1 Rd8 16.Nc3 O-O 17.Qf2 Qf6 18.Rad1 Bg7 19.Qe2 Qf5 20.a3 Qa5 21.Rf1 a6 22.Rc1 h6 23.Ne4 e5 24.Nc5 Qb6 25.dxe5 Nxe5 26.Nxe5 Bxe5 27.b4 h5 28.Rf2 Qc7 29.h3 Qe7 30.Rcf1 Bd6 31.Nd3 Rde8 32.Rf3 a5 33.bxa5 Bxa3 34.Qa2 Bd6 35.Kh1 Qe4 36.Rxf7 Qe6 37.Rxf8+ 1/2-1/2
2025.10.19 Marburger Schachtage 2025
2149076 Derr, Oleg (2116) von Bargen, Lukas (1991) 0-1
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Qd3 Nf6 7.Ndb5 Qb8 8.Qg3 d6 9.Be3 h5 10.O-O-O Ng4 11.Nxd6+ Bxd6 12.Qxd6 Qxd6 13.Rxd6 Nxe3 14.fxe3 Ke7 15.Rd2 Ne5 16.h3 h4 17.Bd3 b6 18.Rhd1 Bb7 19.Bf1 Rac8 20.Rd4 a6 21.Ne2 Rc7 22.Ng1 Rh5 23.Nf3 Nc6 24.Rc4 Rd7 25.a3 b5 26.Rc3 Ne5 27.Be2 Nxf3 28.Bxf3 Rg5 29.Rcd3 Rxd3 30.Rxd3 f5 31.exf5 Bxf3 32.gxf3 Rg3 33.fxe6 Kxe6 34.f4 Kf5 35.Rd5+ Ke4 36.Re5+ Kf3 37.Kd2 Rxh3 38.Rh5 Rh2+ 39.Kd3 Rh1 40.f5 h3 41.Kd2 Rh2+ 42.Kd3 Kg4 43.Rh7 Kxf5 44.Rxg7 Rg2 45.Rh7 h2 46.b3 Kg4 47.c4 bxc4+ 48.Kxc4 Kf3 49.b4 Rg4+ 50.Kc5 Kg3 51.Rxh2 Kxh2 52.Kb6 Rg6+ 53.Ka7 Kg3 54.a4 Rg4 55.e4 Rxe4 56.Kxa6 Rxb4 57.a5 Kf4 58.Ka7 Ke5 59.a6 Kd6 60.Ka8 Kc6 61.a7 Rh4 62.Kb8 Rh8# 0-1
2025.10.18 Marburger Schachtage 2025
2148928 Derr, Oleg (2116) GM Ikonnikov, Vy (2454) 0-1
1.e4 c5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 a6 5.Bxc6 dxc6 6.h3 g6 7.O-O Bg7 8.Re1 Nd7 9.e5 Nf8 10.d4 cxd4 11.Qxd4 Qxd4 12.Nxd4 Ne6 13.Nxe6 Bxe6 14.Bf4 O-O-O 15.Ne4 h6 16.Rad1 g5 17.Bg3 Bf5 18.f3 Rxd1 19.Rxd1 Rd8 20.Re1 Rd5 21.c4 Rd4 22.b3 Bxe4 23.Rxe4 Rxe4 24.fxe4 Kd7 25.Kf2 Ke6 26.Kf3 h5 27.Bf2 Bxe5 28.Be3 Kf6 29.g4 Kg6 30.a4 b5 31.axb5 axb5 32.cxb5 cxb5 33.Bc5 e6 34.Bb6 f5 35.exf5+ exf5 36.Bd8 fxg4+ 37.hxg4 h4 38.Kg2 b4 39.Be7 Bc3 40.Kf3 Bd2 41.Bd6 Kf6 42.Bb8 Ke6 43.Ke4 h3 44.Kf3 Bf4 45.Ba7 Kd5 46.Bb6 h2 47.Kg2 Ke4 48.Bc5 Bd2 49.Kxh2 Kd3 50.Kg2 Kc2 51.Kf3 Kxb3 52.Ke2 Kc2 53.Bd4 b3 54.Bf6 Bc3 0-1
2025.10.18 Marburger Schachtage 2025
2149009 Reichelt, Florian (1965) Derr, Oleg (2116) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 Be6 8.Nc4 Rb8 9.Ne3 Nf6 10.Be2 Be7 11.O-O O-O 12.f4 exf4 13.Rxf4 Ne5 14.Kh1 Ng6 15.Rf1 b5 16.a3 a5 17.Ned5 b4 18.axb4 axb4 19.Nxf6+ Bxf6 20.Nb5 Be5 21.g3 d5 22.Na7 Qd7 23.exd5 Bxd5+ 24.Bf3 Bxf3+ 25.Qxf3 Ra8 26.Rd1 Qh3 27.Ra4 Nh4 28.Qf1 Rfd8 29.Nc6 Qg2+ 30.Qxg2 Rxd1+ 31.Qg1 Rxg1+ 32.Kxg1 Rxa4 33.Nxe5 Ra1 34.Nd3 Nf3+ 35.Kf2 Ne5 36.Bf4 Nxd3+ 37.cxd3 f6 38.Be3 Rh1 39.Kg2 Rd1 40.Kf3 Rxd3 41.Ke4 Rd1 42.h4 Kf7 43.Bc5 Rd2 44.Bxb4 Rxb2 45.Bd6 Ke6 46.Bf8 g6 47.Bh6 Rb4+ 48.Kf3 Kf5 49.Bf4 Rxf4+ 50.gxf4 h5 51.Kg3 Ke4 0-1
2025.10.17 Marburger Schachtage 2025
2148864 Browning, Rebecca (1992) Derr, Oleg (2116) 0-1
1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 d6 6.Nf3 Nc6 7.exd6 Qxd6 8.Nc3 g6 9.Be2 Bg7 10.O-O O-O 11.a3 Rd8 12.h3 Be6 13.Ne4 Qc7 14.Nc5 Bf5 15.Be3 Nxe3 16.fxe3 Nxd4 17.exd4 Bxd4+ 18.Nxd4 Qxc5 19.Rf4 e5 20.b4 Qb6 21.Rh4 g5 22.Kh1 gxh4 23.Nxf5 Rxd1+ 24.Rxd1 Rd8 25.Rf1 Rd2 26.Bf3 Kf8 27.Nxh4 Qf6 28.g3 e4 29.Bg2 Qc3 30.Nf5 e3 31.Nh6 e2 32.Rxf7+ Ke8 33.Rxb7 e1=R+ 34.Kh2 Rxg2+ 35.Kxg2 Qc2+ 0-1
2025.10.17 Marburger Schachtage 2025
2148807 Derr, Oleg (2116) Kobs, S (1885) 1-0
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.O-O-O Nxd4 10.Bxd4 Be6 11.Kb1 a6 12.g4 Rc8 13.h4 h5 14.gxh5 Nxh5 15.Bxg7 Kxg7 16.f4 Bg4 17.Re1 Qa5 18.Rg1 Be6 19.a3 Nxf4 20.Rg5 b5 21.Qxf4 Rxc3 22.bxc3 Qxa3 23.Rd5 Rc8 24.Qc1 Qxc3 25.Rd3 Qb4+ 26.Qb2+ 1-0
2025.10.05 German Youth Teams 2025
1876126 Semling, Johannes (2237) Derr, Oleg (2116) 1/2-1/2
1.e4 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qd3 Nf6 5.Nc3 e6 6.Bf4 Bc5 7.O-O-O O-O 8.Be2 d5 9.e5 Nd7 10.Qg3 f6 11.exf6 Qxf6 12.Nh3 h6 13.Rhe1 Bd4 14.Bd6 Be5 15.Bxe5 Ndxe5 16.f4 Ng6 17.f5 Nge7 18.fxe6 Bxe6 19.Bd3 Nb4 20.Nf4 Qxf4+ 21.Qxf4 Nxd3+ 22.cxd3 Rxf4 23.Rxe6 Nf5 24.Nxd5 Rf2 25.Nc3 Rxg2 26.Re2 Rxe2 27.Nxe2 Kf7 28.Kd2 Rc8 29.d4 g5 30.Kd3 Re8 31.Rf1 Ke6 32.d5+ Ke5 33.Nc3 Nd6 34.Re1+ Kf4 35.Rf1+ Ke5 36.Re1+ Kf4 37.Rf1+ Ke5 1/2-1/2
2025.10.04 German Youth Teams 2025
1876080 Den Heijer, Rolinde (2057) Derr, Oleg (2116) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 g6 7.N1c3 a6 8.Na3 Bg7 9.Nc2 Be6 10.Be2 Nf6 11.O-O Rc8 12.b3 O-O 13.Bg5 h6 14.Be3 b5 15.cxb5 axb5 16.f3 b4 17.Nd5 Bxd5 18.exd5 Ne7 19.Nxb4 Qa5 20.Qd2 Nf5 21.Bf2 Nxd5 22.Qxd5 Qxb4 23.a3 Qc3 24.Bc4 Ra8 25.Rfc1 Qb2 26.a4 h5 27.Qd1 Nd4 28.Be3 d5 29.Rab1 Qa3 30.Bxd5 Rad8 31.Bc4 e4 32.Qf1 exf3 33.gxf3 Kh7 34.Kh1 Nf5 35.Bf2 Bd4 36.Re1 Qc5 37.Bxd4 Rxd4 38.Qg2 Qd6 39.Rb2 Qf6 40.Rf2 Rf4 41.Re4 Qh4 42.Rxf4 Qxf4 43.Bd3 Ne3 44.Qh3 Rd8 45.Qxh5+ Kg7 46.Qb5 Rd5 47.Qa6 Ng4 48.Rg2 Qxf3 49.Be2 Rd1+ 50.Bxd1 Qxd1+ 51.Rg1 Qf3+ 52.Rg2 Nf2+ 53.Kg1 Nh3+ 54.Kh1 Qd1+ 55.Rg1 Qxg1# 0-1
2025.10.03 German Youth Teams 2025
1876002 Derr, Oleg (2116) Mimkes, Antal (2116) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Qd3 a6 7.Nxc6 bxc6 8.e5 Nd5 9.Ne4 c5 10.c3 Be7 11.Qg3 Kf8 12.Bd3 Rb8 13.a3 Bb7 14.Nd6 Bxd6 15.exd6 a5 16.c4 Nf6 17.O-O Qb6 18.Be3 Ne4 19.Bxe4 Bxe4 20.Qe5 Qc6 21.f3 Bg6 22.Bxc5 f6 23.Qd4 Rb3 24.Rac1 Kf7 25.Rfd1 Rhb8 26.Rd2 Qb7 27.Ba7 Ra8 28.Bc5 Rb8 29.Ba7 Ra8 30.Bc5 1/2-1/2
2025.10.03 German Youth Teams 2025
1875916 Derr, Oleg (2116) Naumann, Lennart (1896) 1-0
1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 e6 11.Bf4 Ngf6 12.O-O-O Nd5 13.Bd2 Qc7 14.Kb1 Be7 15.Ne4 O-O-O 16.g3 N7f6 17.c4 Nxe4 18.Qxe4 Nf6 19.Qe2 c5 20.dxc5 Bxc5 21.Bf4 Bd6 22.Rxd6 Rxd6 23.c5 Qxc5 24.Rc1 Qxc1+ 25.Bxc1 Nd5 26.Ne5 Rb6 27.Qg4 Rd8 28.Nxf7 Nc3+ 29.Kc2 Rf8 30.Qxg7 Rxf7 31.Qg8+ Kd7 32.Qxf7+ Kc6 33.bxc3 a5 34.Qxe6+ Kb5 35.a4+ Kxa4 36.Qc4+ Rb4 37.cxb4 b5 38.Qb3# 1-0
2025.10.02 German Youth Teams 2025
1875843 Derr, Oleg (2116) Sommer, Justus (2123) 1/2-1/2
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.a4 d6 6.O-O O-O 7.Be3 Bb6 8.Nbd2 Bg4 9.h3 Bh5 10.Re1 Re8 11.Nf1 d5 12.exd5 Nxd5 13.Bxb6 Nxb6 14.Ba2 Qf6 15.g4 Bg6 16.Ng3 Nd4 17.Nxd4 exd4 18.a5 Nd7 19.Bd5 c6 20.Bg2 Qd6 21.Qd2 Nc5 22.Qb4 Rad8 23.Ne2 Re6 24.Ng3 Rd7 25.Rxe6 Nxe6 26.Qxd6 Rxd6 27.Ra4 a6 28.Ra1 Nf4 29.Ra4 Kf8 30.Rb4 Rd7 31.h4 h6 32.Bf3 Ke7 33.Kf1 Kd8 34.Ne2 Ne6 35.Ke1 Kc7 36.Kd2 Bh7 1/2-1/2
2025.10.01 German Youth Teams 2025
1875724 Derr, Oleg (2116) Junge, Mattheo Gabriel (1945) 1-0
1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Be3 Bd6 7.Bd3 O-O 8.Ne2 Re8 9.O-O Nd7 10.c4 Nf8 11.Qc2 h5 12.h3 h4 13.Rad1 Bb8 14.Qc1 g5 15.d5 Qd6 16.f4 Ng6 17.dxc6 Qe7 18.Bd4 bxc6 19.Rfe1 Qc7 20.Bxf6 gxf4 21.Nd4 Re3 22.Nf3 Qd6 23.Rxe3 fxe3 24.Bg5 Qg3 25.Bxg6 Bxh3 26.Rd8+ Kg7 27.Qc3+ Be5 28.Qxe5+ Qxe5 29.Nxe5 Rxd8 30.Bxd8 fxg6 31.gxh3 1-0
2025.10.01 German Youth Teams 2025
1875756 FM Gallasch, Jonas (2298) Derr, Oleg (2116) 1-0
1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 Bb7 5.Bd3 c5 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 9.exd4 d6 10.Qe2 Nbd7 11.Nbd2 Re8 12.Rad1 Qc7 13.Rfe1 Nf8 14.h3 Ng6 15.Qe3 Rad8 16.Bb1 Ba8 17.Rc1 Bb7 18.Ne4 Nxe4 19.Bxe4 Bf6 20.Nd2 e5 21.Qf3 Bg5 22.Rcd1 Bxd2 23.Rxd2 exd4 24.Rde2 Rxe4 25.Rxe4 Ne5 26.Qd1 Bxe4 27.Rxe4 Nc6 28.Qh5 Qd7 29.Bxd4 Nxd4 30.Rxd4 Qe6 31.Qd1 g6 32.Qd2 Kg7 33.a4 Rd7 34.Rd5 Qf6 35.Kh2 Qa1 36.Rd4 h5 37.f4 Qb1 38.Qc3 Kh7 39.Rd3 Qf1 40.Rf3 Qe2 41.Re3 Qf2 42.Rf3 Qe2 43.a5 b5 44.Re3 Qf1 45.Qf6 Rd8 46.Qxf7+ Kh6 47.Re7 Rg8 48.Qh7# 1-0
2024.11.24 Heusenstamm Schloss Open
265832 Derr, Oleg (2019) CM Rempe, Jonas (2182) 0-1
1.e4 c6 2.Nc3 d5 3.Nf3 dxe4 4.Nxe4 Bf5 5.Qe2 e6 6.d4 Nf6 7.Nxf6+ Qxf6 8.Bg5 Qg6 9.O-O-O Bd6 10.h4 h6 11.h5 Qh7 12.Be3 Bg4 13.Qd2 Qf5 14.Nh4 Qf6 15.Be2 Bxe2 16.Qxe2 Nd7 17.Kb1 O-O-O 18.Nf3 Qf5 19.Nd2 Nf6 20.Rh4 Be7 21.g4 Qd5 22.Rhh1 Rhe8 23.f3 Qa5 24.c4 e5 25.Qf2 exd4 26.Bxd4 b6 27.Rhe1 Bb4 28.Rxe8 Nxe8 29.a3 Qa4 30.Qe2 Rxd4 31.axb4 Nd6 32.c5 Nc4 33.Nb3 Rxd1+ 34.Qxd1 Qxb4 35.cxb6 axb6 36.Qd3 Qxb3 37.Qxb3 Nd2+ 38.Kc2 Nxb3 39.Kxb3 Kd7 40.f4 Kd6 41.Kc4 c5 42.g5 Kc6 43.f5 f6 0-1
2024.11.24 Heusenstamm Schloss Open
265974 Werner, Tom (1872) Derr, Oleg (2019) 1-0
1.Nf3 Nf6 2.Rg1 d5 3.d4 g6 4.h3 Bg7 5.g4 c5 6.e3 h5 7.g5 Ne4 8.Nbd2 Nc6 9.c3 cxd4 10.exd4 Bf5 11.Nxe4 dxe4 12.Nh4 Qd7 13.Nxf5 gxf5 14.Bf4 O-O-O 15.Bb5 e5 16.dxe5 Qc7 17.Qa4 Nxe5 18.Bxe5 Qxe5 19.Rd1 e3 20.Bd7+ Kb8 21.f4 Qc5 22.Ke2 a6 23.Rd3 Qc7 24.Rgd1 Rhg8 25.Bxf5 Rxd3 26.Rxd3 Rd8 27.Rxe3 Qd6 28.Rd3 Qe7+ 29.Qe4 Qc7 30.Rxd8+ Qxd8 31.Qc4 Qc7 32.Qe4 Qe7 33.Kf3 Qd8 34.Qd3 Qb6 35.b3 Qg1 36.Qd2 Qh1+ 37.Kg3 f6 38.Kh4 fxg5+ 39.Kxh5 Qf3+ 40.Kxg5 Bxc3 41.Qd6+ Ka7 42.h4 Qg3+ 43.Bg4 Qe3 44.h5 a5 45.h6 Bb4 46.Qe5 Qd3 47.Qe6 Bd2 48.Qf7 Qd8+ 49.Kh5 Be1 50.Qe6 Bd2 51.Qe5 Qd3 52.Bf5 Qf3+ 53.Kg5 Qg3+ 54.Bg4 Be1 55.Qc5+ Kb8 56.Qc8+ Ka7 57.h7 1-0
2024.11.23 Heusenstamm Schloss Open
265594 Wolf, UlrichM (2228) Derr, Oleg (2019) 1/2-1/2
1.d4 Nf6 2.Nf3 g6 3.Bg5 Bg7 4.Nbd2 d5 5.c3 O-O 6.e3 Nbd7 7.Bd3 Re8 8.O-O e5 9.dxe5 Nxe5 10.Nxe5 Rxe5 11.Bf4 Re8 12.h3 c5 13.Bb5 Bd7 1/2-1/2
2024.11.23 Heusenstamm Schloss Open
265713 IM Klundt, K (2252) Derr, Oleg (2019) 1/2-1/2
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Qf3 Nf6 8.O-O-O h5 9.Nxc6 dxc6 10.h3 b5 11.e5 Nd5 12.Nxd5 exd5 13.Bd3 Be6 14.Rhe1 Be7 15.Qg3 O-O-O 16.Bg5 h4 17.Qf4 c5 18.Bxe7 Qxe7 19.Qd2 Qc7 20.f4 d4 21.Kb1 c4 22.Be4 c3 23.Qc1 Qa5 24.b3 g6 25.Rf1 Rhg8 26.Rf3 Bf5 27.Re1 Qb4 1/2-1/2
2024.11.22 Heusenstamm Schloss Open
265513 Derr, Oleg (2019) Aravindan, Midhulan (1870) 1-0
1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4 a6 8.Qg4 Qf8 9.Nf3 c5 10.dxc5 Nxc5 11.Nxd5 Kd8 12.Qh4+ Kd7 13.Nb6+ Kc6 14.Nxa8 b6 15.O-O-O Kb7 16.Nxb6 Kxb6 17.Qf2 Kc7 18.Rd4 Nc6 19.Rc4 Nd7 20.Nd4 Nb8 21.Be2 Bb7 22.Bf3 Qc8 23.Nxc6 Nxc6 24.Rd1 Rd8 25.Rxd8 Kxd8 26.Bxc6 Bxc6 27.Qd2+ Kc7 28.Rxc6+ Kxc6 29.Qc3+ Kb7 30.Qxc8+ Kxc8 31.b4 Kc7 32.c4 Kc6 33.Kd2 f6 34.Kd3 f5 35.h4 h5 36.Kd4 Kb6 37.a4 Kc6 38.b5+ axb5 39.cxb5+ Kb6 40.Kc4 Ka5 41.Kc5 Kxa4 42.b6 Kb3 43.b7 Kc3 44.b8=Q 1-0
2024.11.22 Heusenstamm Schloss Open
265359 Engel, Bruno (2242) Derr, Oleg (2019) 1-0
1.d4 Nf6 2.Bg5 d5 3.e3 c5 4.Bxf6 gxf6 5.dxc5 Qa5+ 6.Nc3 e6 7.Qd4 Qd8 8.e4 Nc6 9.Bb5 Bd7 10.Bxc6 bxc6 11.Nf3 Rg8 12.exd5 cxd5 13.O-O Be7 14.b4 e5 15.Qxd5 Bh3 16.Qc6+ Kf8 17.Nh4 Rc8 18.Qf3 Bg4 19.Qe4 Qd2 20.Qe3 Qxc2 21.Nd5 Be6 22.Qh6+ Ke8 23.Nxf6+ Bxf6 24.Qxf6 Qe4 25.Rae1 Qxb4 26.Rxe5 Rxc5 27.Rd1 Rd5 28.Rxe6+ fxe6 29.Qxe6+ Kf8 30.Qxd5 1-0
2024.11.21 Heusenstamm Schloss Open
265305 Derr, Oleg (2019) Gaertner, Johannes (1777) 1-0
1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2 Nf6 5.e5 Nfd7 6.a3 Be7 7.Be3 c5 8.f4 Nc6 9.dxc5 Nxc5 10.b4 Nd7 11.Nd4 Nb6 12.Bd3 O-O 13.O-O f6 14.Qh5 f5 15.Nce2 Bd7 16.Nxc6 bxc6 17.Qf3 Rc8 18.Qf2 Kh8 19.Nd4 c5 20.bxc5 Bxc5 21.Nxf5 Bxe3 22.Nxe3 Qc7 23.Qh4 h6 24.Ng4 Qd8 25.Qh3 Qe7 26.Rf3 1-0
2024.10.27 Marburger Schachtage 2024
248888 Derr, Oleg (2033) Hallen, Maxime (1748) 1-0
1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bxf3 5.Qxf3 e6 6.d4 Nf6 7.Be2 dxe4 8.Qe3 Bd6 9.Nxe4 Nxe4 10.Qxe4 Nd7 11.O-O Nf6 12.Qf3 O-O 13.Rd1 Bc7 14.g3 Qd5 15.Qd3 h6 16.Bf1 Rfd8 17.Be3 Qd7 18.c4 Bb6 19.Qb3 Rab8 20.Bg2 Qe7 21.a4 c5 22.a5 Bc7 23.dxc5 Rxd1+ 24.Qxd1 Be5 25.Rb1 Rd8 26.Qf3 Qc7 27.b4 Rd7 28.c6 bxc6 29.Qxc6 Qxc6 30.Bxc6 Rc7 31.b5 Bc3 32.a6 Nd7 33.Rd1 Ne5 34.Bf4 g5 35.Bxe5 Bxe5 36.c5 Kf8 37.Kg2 Ke7 38.Kf3 Bc3 39.Rc1 Bb4 40.b6 Rxc6 41.b7 1-0
2024.10.27 Marburger Schachtage 2024
248826 Sreeramulu, Aarush (1923) Derr, Oleg (2033) 1-0
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bg5 c5 8.Rc1 O-O 9.d5 h6 10.Be3 Nd7 11.Nf3 Nf6 12.Bd3 c4 13.Bb1 b5 14.Qd2 Ng4 15.Bd4 e5 16.dxe6 Bxe6 17.h3 Nf6 18.O-O Kh7 19.Rfd1 Qc7 20.Be5 Qb7 21.Qc2 Rfe8 22.Rd6 Bf8 23.Rd4 Nd7 24.Bd6 Bxd6 25.Rxd6 Nc5 26.Qd2 Qc7 27.e5 Rad8 28.Rd1 Nb7 29.Rd4 Rxd4 30.Nxd4 Qxe5 31.f4 Qc5 32.Kh1 Nd6 33.Re1 Qd5 34.Re5 Qa8 35.Nxe6 fxe6 36.Qxd6 Rd8 37.Qe7+ 1-0
2024.10.26 Marburger Schachtage 2024
248703 Koch, Mika Jonas (1644) Derr, Oleg (2033) 0-1
1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 c6 6.O-O d5 7.cxd5 cxd5 8.Nc3 Nc6 9.Bf4 Ne4 10.Rc1 Qa5 11.a3 Bf5 12.e3 f6 13.h4 Nxc3 14.Rxc3 e5 15.dxe5 fxe5 16.Bg5 h6 17.Qb3 hxg5 18.Qxb7 e4 19.Rxc6 exf3 20.Bxf3 Rab8 21.Qe7 Rbe8 22.Qxg5 Re5 23.Rd1 Be4 0-1
2024.10.26 Marburger Schachtage 2024
248749 Derr, Oleg (2033) FM Dorst, J (2191) 0-1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Nd5 Nxd5 8.exd5 Ne7 9.a4 Nf5 10.Bd3 Be7 11.Bxf5 Bxf5 12.O-O a6 13.Nc3 O-O 14.Be3 Rc8 15.a5 Bg6 16.Qd2 Rc4 17.Ra4 Qc7 18.Rc1 Rc8 19.Bb6 Qd7 20.Rxc4 Rxc4 21.b3 Rc8 22.Na4 Qg4 23.f3 Bg5 24.Be3 Bxe3+ 25.Qxe3 Qb4 26.Qb6 Qxb6+ 27.Nxb6 Rxc2 28.Rxc2 Bxc2 29.b4 Bb3 30.Kf2 Kf8 31.Ke3 Ke7 32.Kd3 f5 33.Kc3 Ba2 34.Kb2 e4 35.fxe4 fxe4 36.Kc3 Kf6 37.Kd4 e3 38.Kxe3 Ke5 39.g3 Bxd5 40.Nd7+ Kf5 41.Nb6 Be6 42.Na4 Ke5 43.Nc3 Bc4 44.Ne4 h6 45.Nd2 Bb5 46.Nf3+ Kd5 47.Nd2 Bd7 48.Kd3 Bf5+ 49.Kc3 g6 50.Nc4 h5 51.Nd2 Be4 52.Nc4 Bf3 53.Nd2 Be2 54.h4 Bb5 55.Nf3 Ke4 56.Ne1 Ke3 57.Ng2+ Kf3 58.Nf4 Be8 0-1
2024.10.25 Marburger Schachtage 2024
248645 Derr, Oleg (2033) Himmelspacht, Maxim (1827) 1-0
1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4 5.Nxe4 Be7 6.Nxf6+ Bxf6 7.Bxf6 Qxf6 8.Nf3 O-O 9.Qe2 b6 10.Qe4 c6 11.O-O-O Qf5 12.Qh4 Ba6 13.c4 Qf6 14.Qg3 Rd8 15.Bd3 c5 16.Be4 Nc6 17.Bxc6 Rac8 18.Be4 cxd4 19.Kb1 Bxc4 20.Rd2 Qe7 21.Rxd4 f5 22.Rxd8+ Qxd8 23.Bc2 Bxa2+ 24.Kxa2 Rxc2 25.Qe5 Qd7 26.Ng5 h6 27.Nxe6 Rxf2 28.Rc1 g5 29.Rc8+ Qxc8 30.Qg7# 1-0
2024.10.25 Marburger Schachtage 2024
248558 GM Korneev, O (2454) Derr, Oleg (2033) 1-0
1.Nf3 Nf6 2.c4 c6 3.Nc3 d5 4.e3 g6 5.d4 Bg7 6.Be2 O-O 7.O-O Ne4 8.Qb3 Nxc3 9.bxc3 dxc4 10.Bxc4 Nd7 11.a4 Nb6 12.Be2 Be6 13.c4 c5 14.a5 cxd4 15.Nxd4 Nd7 16.Ba3 Qc7 17.Nxe6 fxe6 18.Rab1 Rab8 19.Bg4 Nc5 20.Bxc5 Qxc5 21.Qb5 Qa3 22.c5 Bc3 23.Qc4 Bf6 24.Bf3 Rfc8 25.Rfc1 Qxa5 26.Bxb7 Rc7 27.Qxe6+ Kg7 28.c6 Qa3 29.Rd1 Qa4 30.g3 a5 31.h4 Qc2 32.Rbc1 Qb2 33.Rb1 Qc2 34.e4 Rf8 35.Rbc1 Qb2 36.Rb1 Qc2 37.Qb3 Qxe4 38.Qd5 Qc2 39.Rbc1 Qb2 40.Rb1 Qc3 41.Ra1 Qc2 42.Ra2 Bb2 43.Rf1 Qc3 44.Qxa5 Qxa5 45.Rxa5 Bd4 46.Kg2 e5 47.Rd5 Bc3 48.Rfd1 Rff7 49.R1d3 Bd4 50.f4 Rfe7 51.Rd8 Bb6 52.fxe5 Rxe5 53.R8d7+ Re7 54.Bc8 Kf8 55.Rxe7 Kxe7 56.Bd7 Ra7 57.Rb3 Bc7 58.Re3+ Kf7 59.g4 Ra2+ 60.Kf1 Ra4 61.Ke2 Rb4 62.Ra3 Ke7 63.Re3+ Kf7 64.Ra3 Ke7 65.Ra7 Kd6 66.Kf3 Bb8 67.Ra3 Bc7 68.Re3 Bd8 69.Re6+ Kc7 70.h5 gxh5 71.gxh5 Bg5 72.Re8 h6 73.Rc8+ Kd6 74.Ke2 Rh4 75.Be8 Rc4 76.Kd3 Rc1 77.Ra8 Rd1+ 78.Ke4 Rc1 79.Kf5 Rf1+ 80.Kg6 Rc1 81.Ra7 Ke6 82.Ra4 Kd6 83.Rd4+ Kc7 84.Rd5 Bf4 85.Rd7+ Kc8 86.Ra7 Be3 87.Bd7+ Kd8 88.Rb7 Bg5 89.Kf5 Rf1+ 90.Ke6 Re1+ 91.Kf7 Rf1+ 92.Kg7 Rc1 93.Kg8 Rc2 94.Rb8+ Kc7 95.Rc8+ Kd6 96.Re8 Rc1 97.Re6+ Kc7 98.Be8 Rc3 99.Rg6 Re3 100.Bf7 Re5 101.Bb3 Re8+ 102.Kf7 Re7+ 103.Kf8 Re3 104.Bd5 Rc3 105.Rxg5 hxg5 106.h6 Rd3 107.Bg2 1-0
2024.10.24 Marburger Schachtage 2024
248523 Derr, Oleg (2033) Hassler, R (1761) 1-0
1.e4 e6 2.d4 d5 3.Nc3 Be7 4.e5 b6 5.Qg4 g6 6.h4 h5 7.Qg3 Ba6 8.Bxa6 Nxa6 9.a3 Nh6 10.Bxh6 Rxh6 11.Qd3 Nb8 12.Nf3 Nc6 13.Ne2 Qd7 14.Rc1 Na5 15.Nd2 O-O-O 16.c4 dxc4 17.Nxc4 Nc6 18.Qf3 Qd5 19.Qxd5 exd5 20.Nxb6+ Kb7 21.Na4 Na5 22.Nc5+ Kb6 23.Rh3 Nc4 24.Rb3+ Kc6 25.Nb7 Rf8 26.Na5+ Kd7 27.Nxc4 dxc4 28.Rxc4 Bxh4 29.Rb7 Bd8 30.d5 Kc8 31.Rxa7 Kb8 32.Ra5 g5 33.d6 c6 34.Rb4+ Kc8 35.Ra7 1-0
2023.11.26 Heusenstamm Schloss Open
720789 Derr, Oleg (1808) Mehlen, Theodor (1808) 1-0
1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.e3 Be7 7.Qc2 O-O 8.Bd3 h6 9.Bh4 Nbd7 10.Nf3 a5 11.a4 Re8 12.O-O Nh5 13.Bxe7 Qxe7 14.Rae1 Nhf6 15.e4 dxe4 16.Nxe4 Nxe4 17.Rxe4 Qd8 18.Rxe8+ Qxe8 19.Re1 Qf8 20.Bc4 Nb6 21.Bb3 Bd7 22.Ne5 Be6 23.Bxe6 fxe6 24.Qb3 Nd5 25.Qxb7 Rc8 26.Qd7 Qe8 27.Qxe8+ Rxe8 28.Nxc6 Kf7 29.Rc1 Nf4 30.Rc5 Nd3 31.Ne5+ Nxe5 32.dxe5 Rb8 33.Rb5 Rc8 34.g3 Rc4 35.Rxa5 Rb4 36.Ra7+ Kg6 37.a5 Rxb2 38.Re7 Kf5 39.Rxg7 Ra2 40.Rh7 Rxa5 41.Rxh6 Rxe5 42.Rh5+ 1-0
2023.11.26 Heusenstamm Schloss Open
720858 Mohr, Alwin (1614) Derr, Oleg (1808) 0-1
1.e4 Nf6 2.e5 Nd5 3.Nc3 e6 4.Nf3 d6 5.exd6 Bxd6 6.Ne4 O-O 7.Nxd6 Qxd6 8.d4 c5 9.dxc5 Qxc5 10.Bd3 h6 11.O-O Nc6 12.a3 a5 13.c4 Nf6 14.b4 Qh5 15.b5 Ne5 16.Be2 Nfg4 17.h3 Nxf3+ 18.Bxf3 Qe5 19.Bd2 Qh2# 0-1
2023.11.25 Heusenstamm Schloss Open
720690 Moldenhauer, Lennart (1569) Derr, Oleg (1808) 1-0
1.e4 c5 2.a3 e6 3.b4 Nf6 4.bxc5 Nxe4 5.d4 Qf6 6.Nf3 Bxc5 7.c3 Bb6 8.Bd3 d5 9.Qe2 h6 10.Bxe4 dxe4 11.Qxe4 Bd7 12.Ne5 Bc6 13.Nxc6 Nxc6 14.O-O O-O 15.Nd2 e5 16.d5 Ne7 17.Nc4 Ng6 18.Nxb6 Qxb6 19.h4 f5 20.Qe2 Rfe8 21.Be3 Qd6 22.c4 f4 23.Bd2 Nxh4 24.Qg4 Qf6 25.c5 Red8 26.d6 b6 27.d7 h5 28.Qh3 g5 29.Qb3+ Kg7 30.Qd5 Ng6 31.Bc3 Ne7 32.Qxe5 Qxe5 33.Bxe5+ Kf7 34.Rad1 bxc5 35.Bc7 Ng8 36.Bxd8 Rxd8 37.Rfe1 Nf6 38.Re5 Rxd7 39.Rxd7+ Nxd7 40.Rxg5 Ke6 41.Rxh5 c4 42.Kf1 Ne5 43.Ke2 Kd5 44.Kd2 Kd4 45.Rxe5 Kxe5 46.Kc3 Kd5 47.a4 a5 48.g4 f3 49.g5 Ke5 50.g6 Kf6 51.g7 Kxg7 52.Kxc4 Kf6 53.Kd4 Kg5 54.Ke3 Kg4 55.Ke4 Kg5 56.Kxf3 Kf5 57.Ke3 Ke5 58.Kd3 Kd5 59.Kc3 Kc5 60.Kd3 Kb4 61.f4 Kxa4 62.Kc4 Ka3 63.Kc3 Ka2 64.f5 a4 65.f6 a3 66.f7 Kb1 67.f8=Q a2 68.Qf1# 1-0
2023.11.25 Heusenstamm Schloss Open
720594 Derr, Oleg (1808) Kovalskyy, Alicia (1515) 1/2-1/2
1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 Nbd7 5.Bg2 Be7 6.O-O O-O 7.Qc2 c6 8.b3 b6 9.Bb2 Ba6 10.Rd1 Rc8 11.Nc3 dxc4 12.bxc4 Bxc4 13.Ne5 Nxe5 14.dxe5 Nd5 15.Qa4 b5 16.Qxa7 Qb6 17.Qxb6 Nxb6 18.e3 Nd5 19.Bf1 Bxf1 20.Kxf1 Nxc3 21.Bxc3 Rfd8 22.Ke2 Rf8 23.f4 1/2-1/2
2023.11.24 Heusenstamm Schloss Open
720498 John, Volkmar (1646) Derr, Oleg (1808) 1/2-1/2
1.c4 e5 2.g3 c6 3.d4 e4 4.Bg2 Nf6 5.Nc3 d5 6.cxd5 cxd5 7.Bg5 Nbd7 8.Nh3 h6 9.Bxf6 Nxf6 10.e3 Be7 11.O-O O-O 12.Nf4 b6 13.Qe2 Kh8 14.Qc2 Ba6 15.Rfc1 g5 16.Nh3 Qd7 17.Qd1 Rac8 18.Qa4 Qxa4 19.Nxa4 Bb4 20.Nc3 Bxc3 21.Rxc3 Rxc3 22.bxc3 Rc8 23.Rc1 Bd3 24.f4 exf3 25.Bxf3 Be4 26.Be2 Bf5 27.Nf2 Re8 28.Nd1 Ng4 29.Bxg4 Bxg4 30.Kf2 Rc8 31.Nb2 Bf5 32.Ke2 Kg7 33.Kd2 Be6 34.a3 h5 35.h4 f6 36.Rf1 Rc7 1/2-1/2
2023.11.24 Heusenstamm Schloss Open
720360 Derr, Oleg (1808) Siegert, Gregor (2109) 0-1
1.d4 Nf6 2.c4 e6 3.g3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.Bg2 Bg7 8.Nf3 O-O 9.O-O Na6 10.h3 Rb8 11.e4 b5 12.Nd2 Nb4 13.Nf3 Re8 14.a3 Na6 15.Nd2 c4 16.a4 b4 17.Nb5 Nc5 18.Nxc4 Nfxe4 19.Bf4 Ba6 20.f3 Nxa4 21.Rxa4 Bxb5 22.Rxb4 Bxc4 23.Rxc4 Nf6 24.b4 Rb5 25.Qa4 Qb6+ 26.Kh2 Nxd5 27.Rfc1 Nxf4 28.Rxf4 Bh6 29.Re4 Rd8 30.Rce1 Bg5 31.f4 Bf6 32.g4 h6 33.f5 Be5+ 34.Kh1 g5 35.Rb1 Rb8 36.Rf1 Kg7 37.Qa3 Bf6 38.Rc4 d5 39.Rc5 Rd8 40.Rfc1 Rxb4 41.Rc6 Qd4 42.Qa5 Rc4 43.R6xc4 dxc4 0-1
2023.11.23 Heusenstamm Schloss Open
735486 Klein, Deniz (1565) Derr, Oleg (1808) 0-1
1.c4 e5 2.g3 c6 3.d4 e4 4.Bg2 d5 5.Nc3 f5 6.cxd5 cxd5 7.e3 Nf6 8.Nge2 Nc6 9.O-O Be7 10.a3 O-O 11.b4 Be6 12.Bd2 g5 13.Qb3 Kg7 14.Rfc1 Qd7 15.Rc2 Rac8 16.Rac1 Nd8 17.Qa4 Nf7 18.Qxd7 Bxd7 19.f3 Nd6 20.fxe4 fxe4 21.h3 Rc7 22.Nb1 Rxc2 23.Rxc2 Nc4 24.Nec3 Rc8 25.Bf1 Bd6 26.g4 h6 27.Bc1 Nb6 28.Bb2 Na4 29.Rd2 Nb6 30.Bc1 Bg3 31.Re2 h5 32.Kg2 Bd6 33.gxh5 Nxh5 34.Rf2 Bg3 35.Ra2 Bb8 36.Rf2 Ng3 37.Be2 Nf5 38.Bg4 Nh4+ 39.Kf1 Bxg4 40.hxg4 Bg3 41.Re2 Rf8+ 42.Kg1 Nf3+ 43.Kg2 Be1 44.Bb2 Rh8 45.Nxe4 Rh2+ 46.Kf1 Rxe2 47.Kxe2 dxe4 48.Bc3 Bg3 49.Nd2 Nxd2 50.Bxd2 Kf7 51.Kd1 Ke6 0-1
2023.08.27 32nd Schlosspark Open
788538 Derr, Oleg (1755) Montalbano, Federico (2115) 0-1
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6 6.Re1 Bd7 7.c3 g6 8.d4 Bg7 9.Nbd2 O-O 10.Nf1 b5 11.Bc2 exd4 12.cxd4 Bg4 13.Be3 Nh5 14.h3 Bxf3 15.gxf3 Qf6 16.Nh2 Qh4 17.d5 Ne5 18.Kg2 Nc4 19.Nf1 Bxb2 20.Rb1 Bc3 21.Re2 Rae8 22.a4 Re5 23.Bc1 Nf4+ 24.Bxf4 Qxf4 25.Qc1 Rg5+ 26.Ng3 Nd2 27.Re3 Rxg3+ 0-1
2023.08.27 32nd Schlosspark Open
788639 Gaertner, Johannes (1532) Derr, Oleg (1755) 0-1
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Be2 Nc6 9.Be3 O-O 10.h3 Qa5 11.Qd2 cxd4 12.cxd4 Qxd2+ 13.Kxd2 Rd8 14.Kd3 Nxd4 15.Nxd4 Bxd4 16.Bxd4 e5 17.Rac1 Rxd4+ 18.Ke3 Be6 19.Rc7 Rc8 20.Rhc1 Rxc7 21.Rxc7 Rb4 22.a4 Rxa4 23.Rxb7 Ra3+ 24.Kd2 Ra2+ 25.Ke3 a5 26.Bd1 a4 27.Rb5 a3 28.Rb1 Rb2 29.Rc1 a2 30.Bc2 Rxc2 0-1
2023.08.26 32nd Schlosspark Open
788377 Derr, Oleg (1755) Metzner, Luis 1/2-1/2
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Bd3 Nc6 7.Nde2 Nf6 8.O-O Be7 9.Bf4 d6 10.h3 O-O 11.Ng3 b5 12.a3 Bb7 13.Qd2 Ne5 14.Rad1 Rfd8 15.Qc1 Ng6 16.Be3 Rac8 17.f4 d5 18.e5 Nd7 19.Nce2 Nc5 20.Nd4 Nxd3 21.Rxd3 b4 22.axb4 Bxb4 23.Nge2 a5 24.c3 Ba6 25.Rd2 Bc5 26.Qe1 Qb6 27.Qg3 Rd7 28.Rfd1 Rb7 29.Bf2 Rcb8 30.Rc2 Bc4 31.Rdd2 Qa6 32.Nc1 a4 33.h4 Bxd4 34.Bxd4 a3 35.bxa3 Qxa3 36.Kf2 Rb1 37.Nd3 Qa1 38.Ke2 Rf1 39.Be3 Rbb1 40.Bf2 Rfd1 41.h5 Bxd3+ 42.Rxd3 Rxd3 43.Kxd3 Ne7 44.Qg5 Rb7 45.h6 Qd1+ 46.Rd2 Qb1+ 47.Rc2 Qd1+ 1/2-1/2
2023.08.26 32nd Schlosspark Open
788470 Drewes, T (1641) Derr, Oleg (1755) 0-1
1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 d5 5.e3 O-O 6.cxd5 Nxd5 7.Be2 c5 8.O-O Nc6 9.Nxd5 Qxd5 10.dxc5 Qxc5 11.Qb3 Rb8 12.Qb5 Qd6 13.Rd1 Qc7 14.Bd2 a6 15.Qb3 Be6 16.Qc2 Rfc8 17.Rac1 Qb6 18.Qb1 Qxb2 19.Qxb2 Bxb2 20.Rc2 Bf6 21.Rdc1 Rd8 22.Bc4 Bf5 0-1
2023.08.25 32nd Schlosspark Open
788295 Stephanblome, Felix Derr, Oleg (1755) 1/2-1/2
1.e4 c5 2.b3 e6 3.Bb2 Nc6 4.Bb5 d5 5.Bxc6+ bxc6 6.d3 Nf6 7.Nd2 Be7 8.Ngf3 Ba6 9.c4 O-O 10.Qc2 Qc7 11.O-O Nd7 12.Rac1 Rac8 13.Rfe1 Bf6 14.Bxf6 1/2-1/2
2023.08.25 32nd Schlosspark Open
788176 Derr, Oleg (1755) Sydykov, Bayastan (1940) 0-1
1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Qxd5 5.Ngf3 cxd4 6.Bc4 Qd6 7.O-O Nc6 8.Nb3 a6 9.Nbxd4 b5 10.Nxc6 Qxc6 11.Bd3 Bb7 12.Re1 Nf6 13.Bg5 Be7 14.c3 Rd8 15.Qc2 Qc5 16.Bxf6 Bxf6 17.Be4 Bxe4 18.Qxe4 O-O 19.Rad1 a5 20.a3 Rd6 21.Qe3 Qxe3 22.fxe3 Rfd8 23.Rxd6 Rxd6 24.e4 Rd7 25.e5 Be7 26.Kf1 h5 27.Nd4 b4 28.axb4 axb4 29.Nc6 bxc3 30.Nxe7+ Rxe7 31.bxc3 Rc7 32.Re3 Kf8 33.Ke2 Ke7 34.Kd3 f5 35.exf6+ gxf6 36.Rg3 Rc5 37.Rg7+ Kd6 38.Kd4 Rd5+ 39.Ke3 Re5+ 40.Kd3 Rf5 41.h3 Rf2 42.Ke3 Ra2 43.g3 Rg2 44.Ke4 h4 45.Kf3 Rh2 46.Rg4 hxg3 47.Kxg3 Rc2 48.Rc4 Kd5 49.Rc8 Ke4 50.Rc4+ Kf5 51.Kf3 e5 52.Rc7 Rd2 53.Ke3 Rh2 54.Rh7 Ke6 55.Rh6 Rg2 56.c4 Rg3+ 57.Kd2 e4 58.c5 Rd3+ 59.Kc2 Rd5 60.Kc3 Rxc5+ 61.Kd4 Re5 62.Ke3 Kf7 63.Rh4 f5 64.Kf4 e3 65.Kxe5 e2 66.Kxf5 e1=Q 67.Rf4 Qe6+ 68.Kg5+ Kg7 69.Rg4 Qe5+ 70.Kh4+ Kh6 71.Rg8 Qf4+ 72.Rg4 Qf2+ 73.Rg3 Qe1 0-1
2023.08.24 32nd Schlosspark Open
788140 Joshi, Kanad (1370) Derr, Oleg (1755) 0-1
1.e4 c5 2.Nf3 e6 3.d3 d5 4.Nbd2 Nc6 5.g3 Nf6 6.Bg2 Be7 7.O-O O-O 8.e5 Ng4 9.Re1 Qc7 10.Qe2 f6 11.exf6 Bxf6 12.c4 Nh6 13.Nb3 Nf5 14.Nxc5 Ncd4 15.Nxd4 Nxd4 16.Qg4 Qxc5 17.Be3 dxc4 18.Rac1 Qf5 19.Qxf5 Nxf5 20.Rxc4 Nxe3 21.Rxe3 Rb8 22.b3 b5 23.Rc7 Bd4 24.Re2 Rf7 25.Rc6 Bd7 26.Rc7 Rbf8 27.Bh3 Bb6 28.Rxd7 Rxd7 29.Bxe6+ Rdf7 30.Re5 b4 31.Kg2 Re8 32.f4 Kf8 33.Bxf7 Rxe5 34.fxe5 Kxf7 35.Kf3 Ke6 36.Ke4 Bg1 37.h3 Bh2 38.d4 Bxg3 39.d5+ Ke7 40.Kd4 g6 0-1
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