[Event "Soviet Championship"] [Site "?"] [Round "0"] [White "Petrosian"] [Black "Gipslis"] [Result "1-0"] [ECO "A15"] [Opening "English: Anglo-Indian, 2.Nf3"] 1. c4 Nf6 2. Nf3 e6 3. Nc3 c5 4. e3 d5 5. d4 Be7 6. cxd5 exd5 7. dxc5 { White has succeeded in giving Black an isolated d-pawn.} 7... Bxc5 8. Be2 O-O 9. O-O Nc6 10. b3 Be6 { 10...d4 Trying to get rid of the isolated pawn would fail to 11.Na4} 11. Bb2 Qe7 12. Nb5 {A key strategy against the isolated pawn is to post a piece in front of it as no enemy pawn can drive it away. This is known as a blockade.} 12... a6 13. Nbd4 Nxd4 14. Nxd4 Ba3 {A mistake since every exchange will only make the isolani weaker. Black should strive for middlegame complications with 14...Ne4. This targets the c3 square, which is vulnerable if the bishop moves from b2.} 15. Qc1 { 15.Bxa3 Qxa3 16.Qc1 White has a stronger position than in the game.} 15... Bxb2 16. Qxb2 Rac8 17. Rac1 h6 18. Bd3 Qd6 19. h3 {White is better since the Black pieces are tied to the defence of the isolated pawn.} 19... Nd7 20. Nf5 Bxf5 21. Bxf5 g6 22. Bg4 h5 23. Bf3 Ne5 24. Be2 {A rather amusing pawn configuration for Black. All his pawns are on White squares which of course can be attacked by White's light squared bishop.} 24... Rxc1 25. Rxc1 Rd8 26. Rd1 Qf6 27. Qd4 Qe7 28. Qb6 Rd7 29. b4 { Played with the idea of loosening up Black's queenside.} 29... Nc6 30. Bxa6 Nxb4 {30...bxa6 31.Qxc6} 31. Bb5 Rc7 32. a3 Nc2 33. Rxd5 Nxa3 34. Qd4 { Black has successfully parted with his isolated d-pawn. However, new problems have arisen namely his vulnerable back rank.} 34... Rc8 35. Bd3 { Threatening to gain a pawn with 36. Rd7.} 35... b5 36. Bxg6 {The 8th rank having been defended White turns his attention to the seventh rank.} 36... fxg6 37. Rd7 Qf8 38. Qd5+ Kh8 39. Qe5+ Kg8 40. Qe6+ Kh8 { Black resigned as mate would soon follow on 41. Qxg6.} 1-0