1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. b3 c5 7. cxd5 In Miles-Geller, Wijk aan Zee 1977, the players preferred 7. Bb2 Nc6 .
7... exd5 8. d4 Nc6 9. Bb2 Bg4 10. dxc5 Bxc5 White
gets Black's d-pawn isolated, but Black has much freer piece play and
better development. The computer prefers Black here by about 0.4 pawns.
11. Nc3 Re8 12. Rc1 Bf8 13. h3 Bf5 14. Nd4 Bg6 15. e3 Nb4 16. Ba1 Qa5 Not at all bad, but 16... Rc8 is worth considering too.
17. Nde2 Rad8 The
computer assesses Black as about 1/2 pawn better here. Black has
White's a-pawn under pressure, and White's Queen may come under
pressure in the center of the board.
Not 17... Nxa2 18. Nxa2 Qxa2 19. Bxf6 gxf6 20. Bxd5 regaining the pawn with interest.
18. Nf4 Ne4 19. Nxg6 hxg6 20. a4 By this point, the computer assesses the position as roughly equal.
20... Bc5 21. Nb5 Nxf2 22. Rxf2 Bxe3 23. Qf3 Rd7 24. Rd1 Nc2 In this position, White is roughly 1/2 pawn better, but Black has oodles of play.
25. Bc3 Qb6 4r1k1/pp1r1pp1/1q4p1/1N1p4/P7/1PB1bQPP/2n2RB1/3R2K1 w - - 0 26
26. Rxd5 Red8 27. Rxd7 Rxd7 Interesting
that, after all the fireworks, the computer likes White to the tune of
0.6 pawns, but Black has very active piece play for it.
28. Kf1 A poor move, allowing Black to activate his passive Rook. The computer prefers
28. Qe2 and an assault on Black's queenside pawns.
28... Bxf2 29. Qxf2 Ne3+ 30. Ke2 Necessary; if 30. Kg1 Rd1+ 31. Be1 (if 31. Kh2? Ng4+)
31... Qa5 is decisive.
30... Re7 31. Kd3 a6 The software scores this position as roughly equal.
32. Bd4 Qe6 33. Nc3 If White captures 33. Bxe3 , Black is better after 33... axb5 34. axb5 Qxb3+ .
33... Nxg2 34. Qxg2 Qxb3 35. Qd5 Qxd5 36. Nxd5 Re1 37. a5 g5 38. h4 White's
po sition has been going downhill - Black stands a pawn better here.
This pawn exchange permits Black to attack pawns on both sides of the
board with his Rook.
38... gxh4 39. gxh4 f6 40. Ne3 Rb1 41. Nc4 Kf7 42. Nd6+ Ke6 43. Ne8 g6 Black doesn't fear ( 43... g6 ) 44. Nxf6 here, since 44... Rd1+ and ...Rxd4 removes the defender and leaves Black with a winning pawn endgame. Similarly, if
( 43... g6 ) 44. Bxf6 then 44... Kf7 wins a piece.
44. Nc7+ Kd7 45. Nd5 Ke6 46. Nc7+ Kf7 47. Ke4 Permitting
Black to maneuver his Rook on both sides of the board to win a pawn.
Safer might have been to repeat the position with
47. Nd5 until Black comes up with something different.
47... Rh1 48. Bf2 Ra1 49. Bb6 Ra4+ 50. Kd5 An aggressive foray to eat Black's queenside pawns, which should not have worked, but did.
50... Rxh4 51. Kd6 Rh1 It's
preferabl e to begin advancing the kingside pawns immediately, and
bring up support with the King. It takes White several moves to work
around Black's queenside, consume the pawns, and advance his own, and
the Rook can harass White from in front or behind.
52. Kd7 g5 But
now, having given White's King an extra move to advance after 51...Rh1,
it would be better to try 52...Rh8, preventing the White King from
infiltrating. Even so, Black is still winning, but the work becomes
much harder.
53. Kc8 g4 54. Kxb7 g3 55. Kxa6 g2 56. Nb5 Rb1 Preventing White from advancing his King immediately and forcing either a wasteful Bishop or Knight move.
57. Bf2 Ke6 58. Kb6 Kd5 Threatening
...Kc4 and enabling the King to move to the kingside to support the
pawns or to the queenside to stymie the White pawn advance, depending
on the circumstances.
59. Ka6 g1=Q 60. Bxg1 Rxg1 61. Ka7 f5 A huge edge for Black here, being ~3 pawns ahead in position.
Also playable was 61... Kc5 .
62. a6 f4 Although this still works, Black is giving White surviving chances.
62... Kc5 is more to the point, when play might continue 63. Nc3 Rg7+ 64. Kb8 Kb6 65. Nd5+ Kxa6 and Black should have no more difficulties.
63. Kb7 Kc5 64. Nc3 8/1K6/P7/2k5/5p2/2N5/8/6r1 b - - 0 64
64... Kc4 Black's advantage is lost with this move. Winning is
64... Rg7+ 65. Kb8 Kc6 66. Ne4 f3 67. Nf2 Rf7 68. Ng4 Kb6
winning. Black needs to keep his King near the White King and pawn to
create mating threats on the back rank. He will eventually gather in
the a-pawn.
65. Ne4 With Nf2+, Nh3, and Nxf4 coming up, White has no difficulty holding the draw.
65... Kd3 66. Nf2+ Ke3 67. Nh3 Rb1+ 68. Kc7 Ra1 69. Kb7 f3 70. a7 f2 71. Nxf2 Kxf2 72. a8=Q Rxa8 73. Kxa8 1/2-1/2
[Jeff Burch and CM9000]