[Event "Ch Commonwealth"] [Site "masterchessopen.com – London (England)"] [Date "1985.02.19"] [Round "4"] [White "Potts Alan (ENG)"] [Black "Clemance Philip A (NZL)"] [Result "1-0"] [WhiteElo "2256"] [BlackElo "2355"] [ECO "C70"] [Opening "Spanish: 4.Ba4"] 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c4 Bg4 6.Nc3 Ne7 7.d3 g6 8.Bg5 Qc8 9.Nd5 h6 10.Bf6 Rg8 11.O-O Bd7 12.d4 Nxd4 13.Nxd4 exd4 14.Bxd7+ Qxd7 15.Qxd4 b6 16.b4 O-O-O 17.a4 Nxd5 18.cxd5 Be7 19.Bxe7 Qxe7 20.a5 Kb7 21.axb6 cxb6 22.Qc4 Ra8 23.Qc6+ {#r} 1-0