[Event "URS-ch38 Riga"]
[Site "Riga"]
[Date "1970.??.??"]
[Round "4"]
[White "Karpov, Anatoly"]
[Black "Antoshin, Vladimir S"]
[Result "1/2-1/2"]
[ECO "C82"]
[Opening "Ruy Lopez: Open, St. Petersburg Variation"]
[PlyCount "80"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2 O-O 11.Bc2 Nxd2 12.Qxd2 f6 13.exf6 Rxf6 14.Ng5 Bf5 15.b4 Bb6 16.Bb3 Ne7 17.a4 c6 18.Re1 Bg6 19.Nf3 Nf5 20.Ne5 Be8 21.Qa2 bxa4 22.Bxa4 h6 23.Bf4 a5 24.Nd3 axb4 25.cxb4 Nd6 26.Be5 Rf7 27.Nc5 Bxc5 28.bxc5 Ne4 29.Bd4 Rfa7 30.Qc2 Bd7 31.f3 Ng5 32.Ra2 Ne6 33.Bf2 Qf6 34.Bb3 Nd4 35.Rxa7 Rxa7 36.Qd3 Nxb3 37.Qxb3 Ra1 38.Qb4 Bf5 39.h3 Rxe1+ 40.Qxe1 d4 1/2-1/2