[Event "USSR vs USA Match"] [Site "?"] [Round "0"] [White "Horowitz"] [Black "Petrosian"] [Result "0-1"] [ECO "A56"] [Opening "Benoni: Czech, 4.Nc3 d6"] 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 6. g3 Bg7 7. Bg2 O-O 8. Nge2 Nh5 9. O-O Nd7 10. Be3 f5 11. f4 exf4 {Since White has more room for his pieces, it wouldn't make sense to maintain the central tension. While after these exchanges Black gains the e5 square for his pieces.} 12. Nxf4 Nxf4 13. Bxf4 { 13.gxf4 fxe4 14.Nxe4 Nf6 is fine for Black due to the holes in White'sposition. } 13... Ne5 {This outpost at e5 is the foundation of Black's winning strategy.} 14. Qe2 a6 15. Bh3 { Played with the idea of exchanging his bad light squared bishop.} 15... Bd7 16. exf5 gxf5 {Takes away the e4 square from White's pieces. 16...Bxf5 would play into White's hands after 17.Bxf5 Rxf5 18.Ne4} 17. Rae1 Qe8 18. Nd1 Qg6 19. Ne3 Rae8 20. Qc2 Qh5 {Black eases the pressure against his f-pawn by driving back the light squared bishop.} 21. Bg2 Re7 22. b4 b6 23. bxc5 bxc5 24. Qb3 Rfe8 25. Nc2 a5 {Before beginning play in the center Black locks up the queenside.} 26. h3 a4 27. Qb6 Qg6 28. Qa6 Bh6 29. Kh1 { Very nice Black exchanges off White's best minor piece.} 29... Bxf4 30. gxf4 Nd3 31. Rxe7 Rxe7 {White has no way of opposing the invasion of the Black army. } 32. Qa5 Re2 33. Qd8+ Be8 34. Bf3 Rxc2 35. Bh5 Nf2+ { White resigned, since he gets checkmated after.} 36. Rxf2 Rc1+ 37. Kh2 Qg1# 0-1