[Event "World Championship"] [Site "?"] [Round "0"] [White "Petrosian"] [Black "Botvinnik"] [Result "1-0"] [ECO "A10"] [Opening "English: 1...g6"] 1. c4 g6 2. Nf3 Bg7 3. Nc3 e5 4. g3 Ne7 5. Bg2 O-O 6. d4 exd4 {6...exd4 gi ves up the central pressure. Better was to retain the tension with 6...d6.} 7. Nxd4 Nbc6 8. Nxc6 Nxc6 {8...bxc6 would leave Black with doubled c-pawns and three pawn islands to White's two pawn islands.} 9. O-O d6 {9...Bxc3 1 0.bxc3 It's true Black has doubled the White c-pawns but at the severe price of Black weakening the dark squares.} 10. Bd2 Bg4 { A subtle move. The idea is to force White to weaken his kingside with 11. h3.} 11. h3 Be6 12. b3 Qd7 {Due to Black's 10...Bg4 the queen now goes to d7 with a double attack on the White h-pawn.} 13. Kh2 Rae8 14. Rc1 f5 {Black overestimate s his chances on the kingside. Better was 14...Ne7. 14...Ne7 Controlling the central square of d5 was to be preferred.} 15. Nd5 { White wastes no time in occupying the critical d5 square.} 15... Kh8 16. Be3 Bg8 17. Qd2 Nd8 18. Rfd1 Ne6 19. Nf4 { A strong move which stops the Black knight from reaching the e4 square via c5.} 19... Nxf4 20. Bxf4 Qc8 21. h4 Re7 22. Bf3 Bf7 23. Qa5 Be8 24. c5 {24.Qxa7 is so good as Bc6 25.Bxc6 bxc6 26.Bxd6 cxd6 27.Qxe7 would win the exchange.} 24... d5 {Black sets a positional trap.} 25. Bd6 {25.Rxd5 White avoided 25. Rxd5 as after Bc6 26.Rd2 Bxf3 27.exf3 White's extra pawn would be a useless doubled one.} 25... Qd7 {25...cxd6 26.cxd6 Qd7 27.dxe7 Qxe7 would not only leave White an exchange up, but allow the White rook to enter the seventh rank} 26. Bxe7 Qxe7 27. Rxd5 f4 28. Qd2 Bc6 29. Rd3 Bb5 30. Rd4 {White gives back the exchange which forces an ending where he will be a pawn up.} 30... fxg3+ 31. fxg3 Bxd4 32. Qxd4+ Qg7 33. Qxg7+ Kxg7 34. Rc2 Re8 35. Kg2 Kf6 36. Kf2 Bc6 { Black enters into the rook and pawn ending.} 37. Bxc6 bxc6 38. Rc4 Ke5 39. Ra4 {A good move which ties down the Black rook to the defence of the a-pawn.} 39... Ra8 40. Ra6 Kd5 41. b4 Kc4 42. a3 Kb5 43. Ra5+ Kc4 44. Ke3 a6 45. Kf4 { With both of Black's pieces busy on the queenside, the White kings goes over to the unprotected Black pawns on h7 and g6.} 45... Kd5 46. Kg5 Re8 47. Rxa6 Rxe2 48. Ra7 {Remember that rooks belong on the seventh rank where the enemy pawns can't protect themselves.} 48... Re5+ 49. Kf4 Re7 50. Rb7 Ke6 51. a4 Kd7 52. Rb8 {A little finesse which keeps the Black king from White's a pawn. Black resigned.} 1-0