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With White’s king joining the fray, Petrosian finishes things off with pinpoint accuracy against Black’s misplaced forces: 41. Kf7! (the sealed move) Ra1 42. Re6 Bd8 (Bb4 43. Nf6+ Kc8 44. Rxe5) 43. Rd6+ Kc8 (Kc7 44. Ke6 Rxa4 45. Rd7+ Kc8 46. Nd6+ Kb8 47. Rxd8+ Kc7 48. Rc8 mate) 44. Ke8! Bc7 45. Rc6 (the threat is simply Ng5-e6) Rd1 (Kb7 46. Ng5 e4 [Rxa4 47. Ne6 Bb8 48. Nd8+ Ka8 49. Rc8 Ra2 50. Nc6] 47. Rc4 Bb8 48. Rxe4 and wins) 46. Ng5 Rd8+ 47. Kf7 Rd7+ 48. Kg8, and Botvinnik gave up facing lines like 48…h5 49. Ne6 Re7 50. Rxc7+ Rxc7 51. Nxc7 Kxc7 52. f4! Kd6 53. Kf7 exf4 54. exf4 with an elementary win.

Morozevich-Laznicka, European Club Cup, Rhodes, Greece, October 2013

1. g3 e5 2. c4 Nf6 3. Bg2 Nc6 4. Nc3 Bc5 5. e3 d5 6. cxd5 Nb4 7. Nf3 Nd3+ 8. Ke2 Nxd5 9. Qa4+ Bd7 10. Qe4 N5b4 11. a3 Bc6 12. Qc4 b5 13. Qg4 Nc2 14. Qxg7 Rf8 15. Ra2 b4 16. axb4 Ncxb4 17. Ra5 Qd6 18. Qg4 Bb6 19. Ra3 Rd8 20. Ne4 Qe7 21. Qf5 f6 22. Nh4 Bb5 23. Kf3 Nc2 24. Rxd3 Rxd3 25. Qh5+ Kd8 26. Nf5 Qb4 27. Kg4 Rd7 28. Kh3 Bd3 29. Qf3 c6 30. g4 h5 31. gxh5 Rh7 32. Neg3 Rfh8 33. e4 Qc4 34. Kh4 Kc7 35. b3 Qxb3 36. Bb2 Qxb2 37. Qxd3 Rd7 38. Qf3 Nb4 39. Ne3 Bxe3 40. dxe3 Nd3 41. Rd1 a5 42. Bh3 Rd6 43. Qg4 Rhd8 44. Qg7+ Kb6 45. h6 Qxf2 46. Rb1+ Nb4 47. h7 Qxe3 48. Bf5 Rd2 49. Rh1 Qg5+ 50. Qxg5 fxg5+ 51. Kxg5 a4 52. Kf6 a3 53. Be6 R2d6 54. Nf5 Rxe6+ 55. Kxe6 Rh8 56. Kxe5 a2 57. Ra1 Rxh7 58. h4 Ra7 59. Ne3 Kc5 60. Rc1+ Kb5 61. Ra1 Ra3 62. Nf5 Kc4 63. h5 Nc2 64. Rxa2 Rxa2 65. h6 Ra7 66. Kf6 Nd4 67. Ne7 Ra1 68. h7 Rh1 69. Kg7 Ne6+ 70. Kg8 Rg1+ 71. Kf7 Ng5+ 72. Kg6 Nxh7+ 73. Kxh7 c5 74. Nf5 Re1 White resigns.

Petrosian-Botvinnik, World Championship Match, Moscow, 1963

1. c4 g6 2. d4 Nf6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Be2 dxc4 7. Bxc4 c5 8. d5 e6 9. dxe6 Qxd1+ 10. Kxd1 Bxe6 11. Bxe6 fxe6 12. Ke2 Nc6 13. Rd1 Rad8 14. Rxd8 Rxd8 15. Ng5 Re8 16. Nge4 Nxe4 17. Nxe4 b6 18. Rb1 Nb4 19. Bd2 Nd5 20. a4 Rc8 21. b3 Bf8 22. Rc1 Be7 23. b4 c4 24. b5 Kf7 25. Bc3 Ba3 26. Rc2 Nxc3+ 27. Rxc3 Bb4 28. Rc2 Ke7 29. Nd2 c3 30. Ne4 Ba5 31. Kd3 Rd8+ 32. Kc4 Rd1 33. Nxc3 Rh1 34. Ne4 Rxh2 35. Kd4 Kd7 36. g3 Bb4 37. Ke5 Rh5+ 38. Kf6 Be7+ 39. Kg7 e5 40. Rc6 Rh1 41. Kf7 Ra1 42. Re6 Bd8 43. Rd6+ Kc8 44. Ke8 Bc7 45. Rc6 Rd1 46. Ng5 Rd8+ 47. Kf7 Rd7+ 48. Kg8 Black resigns.

David R. Sands can be reached at 202/636-3178 or via email at dsands@washingtontimes.com.