Stockfish
PGN
| Event | British Columbia op |
| Site | Richmond CAN |
| Date | 2013.02.10 |
| Round | 3.1 |
| White | Patterson, Roger |
| Black | Villavieja, Butch |
| Result | 1/2-1/2 |
| WhiteElo | 2084 |
| BlackElo | 2304 |
| ECO | B93 |
| Opening | Sicilian Defense: Najdorf Variation, Amsterdam Variation |
| PlyCount | 68 |
Moves
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nf3 Nbd7 8.Bd3 Be7 9.O-O O-O 10.a4 exf4 11.Kh1 Ne5 12.Bxf4 Bg4 13.Qe1 Bxf3 14.gxf3 Ng6 15.Bg3 Re8 16.Qd2 Qa5 17.Rad1 Qh5 18.Qg2 Rac8 19.f4 Qa5 20.Rde1 Bf8 21.Re2 Qb4 22.e5 Nh5 23.Qh3 Nxg3+ 24.hxg3 Qxb2 25.Ne4 Qd4 26.e6 Be7 27.exf7+ Kxf7 28.Ng5+ Bxg5 29.fxg5+ Kg8 30.Bxg6 hxg6 31.Rh2 Qd5+ 32.Kg1 Qd4+ 33.Kh1 Qd5+ 34.Kg1 Qd4+ 1/2-1/2
