New tournament with lots of different AIs

[TracySMiller]

Chessmaster outplays Rebel 12 in a tough Sicilian Rossollimo, and takes the match 4.5-1.5. Chessmaster thus advances to the Semi-Finals.

WHITE Chessmaster (Grandmaster Edition)
BLACK Rebel 12
RESULT 1-0

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. h3 Bg7 6. Nc3 Nf6 7. d3 O-O 8. Be3 b6 9. Qd2 e5 10. Bh6 Qe7 11. O-O-O Ne8 12. Kb1 f6 13. Nh2 Bxh6 14. Qxh6 Qg7 15. Qe3 a5 16. f4 exf4 17. Qxf4 a4 18. a3 b5 19. Ne2 b4 20. Nf3 Qb7 21. Ka1 Be6 22. Rhf1 c4 23. Nfd4 Bf7 24. axb4 Qxb4 25. Nxc6 Qb7 26. Ncd4 a3 27. b3 cxd3 28. Rxd3 Nc7 29. Rc3 Nb5 30. Nxb5 Qxb5 31. Nd4 Qb4 32. Qd2 Qe7 33. Nc6 Qxe4 34. Rxf6 Rfe8 35. Ka2 Bd5 36. Rc5 Bf7 37. Rf2 Rac8 38. Qd6 Be6 39. Rf4 Qe1 40. Qd3 Ra8 41. Rf1 Qh4 42. Re5 Qh6 43. Qd4 Qg7 44. Rfe1 Bf7 45. Rxe8+ Bxe8 46. Qd5+ Kh8 47. Nd4 Rb8 48. Kxa3 Qa7+ 49. Kb2 Ra8 50. c4 h5 51. Rf1 Kh7 52. g4 Qa3+ 53. Kc3 Rb8 54. Qe5 Qb4+ 55. Kc2 Rd8 56. gxh5 Qd6 57. Qxd6 Rxd6 58. hxg6+ Kxg6 59. Rf4 Bd7 60. h4 Kh5 61. Nf3 Bg4 62. Ne5 Bd1+ 63. Kc3 Re6 64. Nd7 Rc6 65. b4 Ba4 66. Nc5 Bd1 67. Ne4 Ba4 68. Kd4 Rb6 69. b5 Rb8 70. Nd6

[TracySMiller]

At last the semi-finals have arrived. Four chess AI's have survived this far, fighting for the honor of facing Stockfish for the Championship. The Semi-finals will be Best of Ten games. The pairings are:

#1 Arasan vs. #4 Chessmaster Grandmaster Edition

#2 Defenchess 2.2 vs. #3 DGT Centaur

Who will win? What will the scores be?

[Kasparov111]

Not sure about the scores, but I'll go with Chessmaster and Defenchess

[TracySMiller]

The first match of the Semi-Finals pits top seed Arasan 23.3 against the fourth-seeded Chessmaster Grandmaster Edition. Best of ten games.

Game one saw the mighty Arasan sack a Knight to obtain a mass of passed pawns that would pay huge dividends 20 moves later. Chessmaster resigned after Black's 48th move. Arasan leads the match 1-0.

WHITE Chessmaster Grandmaster Edition
BLACK Arasan 23.3
RESULT 0-1

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. h4 Rc8 11. Bb3 h5 12. O-O-O Ne5 13. Bg5 Rc5 14. g4 hxg4 15. f4 Nc4 16. Qd3 b5 17. Bxf6 Bxf6 18. e5 dxe5 19. Ndxb5 Nxb2 20. Kxb2 exf4 21. Kc1 e6 22. Qxd7 Qxd7 23. Rxd7 Bxc3 24. Nxc3 Rxc3 25. Kd2 Rf3 26. h5 g5 27. Ke2 Kh7 28. c4 Kh6 29. Rxa7 Re3+ 30. Kd2 g3 31. Rd7 g4 32. Rd4 Rf3 33. Ke1 Rh8 34. Bd1 Re3+ 35. Kd2 Kg5 36. c5 Ra3 37. Bb3 g2 38. Rg1 f3 39. Ke3 Kh4 40. Kf2 e5 41. Rc4 Rd8 42. Rc2 e4 43. Rxg2 fxg2 44. Kxg2 f5 45. c6 f4 46. Rc1 f3+ 47. Kg1 Ra7 48. Re1 Re7

[TracySMiller]

Chessmaster tries the Slav Defense in Game Two, and the game gets into some complicated tactics that sees Arasan emerge a piece up. Arasan puts the game away with fantastic precision, and now leads the match 2-0.

WHITE Arasan 23.3
BLACK Chessmaster Grandmaster Edition
RESULT 1-0

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 g6 5. Nc3 Bg7 6. Bd3 O-O 7. O-O Bg4 8. h3 Bxf3 9. Qxf3 e6 10. Rd1 Nbd7 11. Bd2 Re8 12. Rac1 Qe7 13. Be1 Rad8 14. Qe2 a6 15. Qc2 c5 16. cxd5 exd5 17. Be2 cxd4 18. Rxd4 Qe6 19. Rcd1 Nb6 20. R4d3 Qc6 21. Qb3 Rd6 22. Bf3 Rd7 23. Rd4 Rc8 24. Ne2 h6 25. Bc3 Nc4 26. Nf4 Rcd8 27. R4d3 b5 28. Bxf6 Qxf6 29. Nxd5 Qe6 30. Bg4 f5 31. Nf4 Qe8 32. Rxd7 Rxd7 33. Rxd7 Qxd7 34. Be2 Qf7 35. Qc2 g5 36. Nd3 Qf6 37. b3 Nd6 38. Qc6 Ne4 39. Qe8+ Kh7 40. Bh5 Nd6 41. Qc6 Ne4 42. Qd7 Qa1+ 43. Kh2 Qf6 44. g3 Kh8 45. Qc8+ Kh7 46. Kg2 Nc3 47. Qd7 Nxa2 48. Bf7 h5 49. Be6 Nc3 50. Bxf5+ Kg8 51. e4 h4 52. e5 Qf8 53. Qe6+ Qf7 54. Bh7+ Kf8 55. Qc8+ Qe8 56. Qxc3 Bh8 57. Be4 hxg3 58. Kxg3 a5 59. Qc5+ Kg8 60. Qd5+ Kf8 61. Kg2 Qf7 62. Qxb5 Qc7 63. Qd5 Qf7 64. e6 Qe7 65. Ne5 Bxe5 66. Qxe5 Kg8 67. Qf5 Qg7 68. Qd5 Qe7 69. Qe5 a4 70. bxa4 g4 71. hxg4 Qh4 72. e7 Qxg4+ 73. Kh2 Qh4+ 74. Kg1 Qg4+ 75. Bg2 Qg6 76. e8=Q+ Qxe8 77. Qxe8+ Kg7 78. Qe7+ Kg6 79. Be4+ Kh5 80. Qf6 Kg4 81. Bf3+ Kh3 82. Qh8#

[TracySMiller]

Arasan takes a commanding 3-0 lead with an incredible attacking game with the Semi-Slav, including a beautiful Rook sac clearing sacrifice 26...Rxe3, a move that would make Fischer proud.

WHITE Chessmaster Grandmaster Edition
BLACK Arasan 23.3
RESULT 0-1

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. exf6 Bb7 12. Be2 Qb6 13. a4 O-O-O 14. a5 Qc7 15. a6 Ba8 16. Bf3 Nc5 17. Nxb5 cxb5 18. Bxa8 Nb3 19. Be3 Kb8 20. Bf3 Nxa1 21. Qxa1 e5 22. d5 e4 23. Bxe4 Re8 24. Bf3 Bh6 25. Ke2 Qb6 26. Qc1 Rxe3+ 27. fxe3 Re8 28. Kf1 Rxe3 29. Qc2 Qxa6 30. Kf2 Qb6 31. Kf1 Qxf6 32. Qf2 Qf5 33. Qg3+ Re5 34. Qh4 Be3 35. Qe1 Qd3+ 36. Qe2 Qb1+ 37. Qe1 Qxb2 38. g3 Bb6 39. Qxe5+ Qxe5 40. Kg2 Qb2+ 41. Kh3 Qf2 42. Bh5 c3 43. Bd1 c2 44. Bxc2 Qxc2 45. Rf1 Qh7+ 46. Kg2 Qe4+ 47. Kh3 Qxd5 48. Rf4 Qe6+ 49. Kg2 Qe2+ 50. Kh3 Bc7 51. Rd4 Qf1+ 52. Kg4 Qf6 53. Rd2 b4 54. Re2 Qg6+ 55. Kf3 Qc6+ 56. Kg4 Qd7+ 57. Kg5 Qb5+ 58. Kf6 Qxe2 59. Kxf7 b3 60. g4 b2 61. g5 b1=Q 62. g6 Qf5+ 63. Kg7 Qd7+ 64. Kh8 Qee8#

[TracySMiller]

Arasan outmaneuvers Chessmaster in a complex Queen's Gambit Accepted to take a 4-0 lead in the match. Chessmaster resigned after White's 67th move, as it sees the Mate in 11.

WHITE Arasan 23.3
BLACK Chessmaster Grandmaster Edition
RESULT 1-0

1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 Nb6 6. Bd3 Nc6 7. Ne2 Bg4 8. f3 Be6 9. Nbc3 g6 10. Be4 f5 11. Bxc6+ bxc6 12. h4 Qd7 13. b3 a5 14. h5 gxh5 15. Rxh5 Bf7 16. Rh4 a4 17. Nxa4 Nxa4 18. bxa4 c5 19. Ba3 Bg7 20. Bxc5 Qxa4 21. Nf4 Qa5+ 22. Kf2 Bxe5 23. Bxe7 Bxf4 24. Bf6 Be3+ 25. Kxe3 O-O 26. Be5 Rfe8 27. Kf2 Qb4 28. Kg3 Qb6 29. Qc2 Qg6+ 30. Kh2 c5 31. Qd2 cxd4 32. Rh6 Qxh6+ 33. Qxh6 Rxe5 34. Qg5+ Bg6 35. Rb1 Rd5 36. Rb7 Rf8 37. Qe7 Rf7 38. Rb8+ Kg7 39. Qe6 Rdd7 40. Qe5+ Kh6 41. Qf4+ Kg7 42. Rb4 d3 43. Qe5+ Rf6 44. Rb6 Rf7 45. a4 d2 46. Rd6 f4 47. a5 Kh6 48. Qd4 d1=Q 49. Qxd1 Rf5 50. a6 Rc7 51. Rd5 Rff7 52. Qa1 Ra7 53. Rd6 Rf5 54. Rf6 Rh5+ 55. Kg1 Rb5 56. Qd4 Ra8 57. Qxf4+ Kg7 58. Qd4 Kh6 59. a7 Rb7 60. Rf4 Rb5 61. Rh4+ Rh5 62. Qe3+ Kg7 63. Rb4 Rf5 64. Qd4+ Kh6 65. Qd2+ Kg7 66. Qd7+ Rf7 67. Qd4+

[TracySMiller]

Arasan continues the steamroller with this win to move to a perfect 5-0 in this match, one win or draw away from making the Finals. Arasan got underneath Chessmaster's position and flushed its King out into the open.

WHITE Chessmaster Grandmaster Edition
BLACK Arasan 23.3
RESULT 0-1

1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. e4 Nc6 5. Be2 Qb6 6. O-O d6 7. a3 Be7 8. b4 O-O 9. d3 a6 10. Bf4 cxb4 11. axb4 Nxb4 12. Qb3 a5 13. d4 Qd8 14. Rfd1 d5 15. Nd2 b6 16. cxd5 exd5 17. e5 Ne8 18. Nf1 Ba6 19. Bd2 Nc7 20. Ne3 Bxe2 21. Nxe2 Qd7 22. Bxb4 axb4 23. Nf4 Ra5 24. Rxa5 bxa5 25. Ra1 Ra8 26. Nfxd5 Nxd5 27. Nxd5 Bf8 28. Ra4 Qb5 29. g3 Rc8 30. Ra1 a4 31. Rxa4 Rc4 32. Nxb4 Rc1+ 33. Kg2 Qf1+ 34. Kf3 Qh1+ 35. Kf4 Re1 36. Qc2 Qxh2 37. Ra1 Qh6+ 38. Kg4 Rxa1 39. Nd3 Qe6+ 40. Kf3 Qd5+ 41. Ke3 h5 42. f3 g6 43. f4 Ra3 44. Qd2 Qh1 45. Qc2 Qg1+ 46. Ke4 Qxg3 47. Qe2 h4 48. Qf3 Qxf3+ 49. Kxf3 Rxd3+ 50. Ke2 Ra3 51. Kf2 h3 52. Kg1 Bh6 53. e6 fxe6 54. d5 Ra2 55. dxe6 Bxf4 56. e7 h2+ 57. Kh1 Ra1+ 58. Kg2 h1=Q+ 59. Kf2 Ra2#

[TracySMiller]

Arasan completes the sweep by crushing open Chessmaster's King position, then marching a passed pawn to victory. Arasan advances to the final with a 6-0 shellacking of Chessmaster and has not lost or drawn a game yet in these Candidates' matches.

WHITE Arasan 23.3
BLACK Chessmaster Grandmaster Edition
RESULT 1-0

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd3 Be7 8. O-O-O O-O 9. f4 h6 10. h4 Nxd4 11. Qxd4 hxg5 12. hxg5 Ng4 13. Qd2 e5 14. g3 Be6 15. Bh3 Rc8 16. Bxg4 Bxg4 17. Rdf1 Rxc3 18. Qh2 f5 19. g6 Bh4 20. bxc3 fxe4 21. Qd2 Qe8 22. Rxh4 Qxg6 23. Rfh1 Re8 24. Qd5+ Qe6 25. Qxb7 Qd7 26. Qxe4 Bf5 27. Qd5+ Qe6 28. Qb7 Qd7 29. Rh8+ Kf7 30. Qxd7+ Bxd7 31. Rxe8 Bxe8 32. fxe5 dxe5 33. c4 a5 34. Rd1 Ke6 35. c5 e4 36. Rd6+ Ke5 37. Kd2 Bb5 38. Ke3 g5 39. Rd4 Bc6 40. c4 a4 41. Rd6 Bb7 42. Rh6 Kf5 43. c6 Ba6 44. c7 Bc8 45. Rh8 Bb7 46. c8=Q+ Bxc8 47. Rxc8 Ke6 48. Rd8 Ke7 49. Rd4 Kf6 50. c5 Kf5 51. c6 Kg4 52. c7 Kxg3 53. Rxe4 g4 54. c8=Q Kh2 55. Rxg4 Kh3 56. Rg5+ Kh4 57. Qg4#

[Kasparov111]

Arasan way too strong for chessmaster....

[paulwise3]

What are your thoughts on Round One? Were you surprised by any of the outcomes? Do you have a favorite game or favorite moves? What are your predictions about Round Two?

Hi Tracy,
Just now saw your very interesting tournament!
About the dedicated chess computers: it would have taken you just one look at the wiki-elo-liste to see that the Tasc R40 is clearly the strongest of them. (EDIT: apart from the King Performance and the Centaur of course).
For the rest I am curious how the Centaur will do in semi and possibly full final.
Paul

[TracySMiller]

The second SEMI-FINAL match gets underway as the powerful DGT Centaur faces the Karpov-like Defenchess 2.2. Best of Ten games.

Game One sees Defenchess getting the better of DGT Centaur in a tough English opening. Defenchess gets a passed pawn and uses it to tie up the Centaur's Rook in the endgame to take a 1-0 lead in the match.

WHITE DGT Centaur
BLACK Defenchess 2.2
RESULT 0-1

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3 d5 5. cxd5 Nxd5 6. e4 Nf4 7. d4 exd4 8. Bxf4 dxc3 9. bxc3 Qf6 10. Qd2 Bc5 11. Bg5 Qg6 12. Qd5 Bd6 13. e5 Be6 14. Qb5 Qe4+ 15. Be2 Bxe5 16. O-O O-O 17. Bd3 Qd5 18. Qxd5 Bxd5 19. Nxe5 Nxe5 20. Bc2 h6 21. Bf4 Rfe8 22. Rfe1 Nc4 23. Bxc7 Nxa3 24. Bd3 Bc4 25. Be4 Nb5 26. Bf4 g5 27. Bg3 a5 28. f4 a4 29. fxg5 hxg5 30. Bxb7 Rxe1+ 31. Bxe1 Ra7 32. Bc6 a3 33. Bd2 f6 34. Kf2 a2 35. Be3 Ra5 36. Bb6 Ra6 37. Bxb5 Bxb5 38. Bc5 f5 39. Be7 Bc4 40. Ke3 Rb6 41. Bb4 Re6+ 42. Kd4 Re4+ 43. Kc5 Kf7 44. Ba3 f4 45. Bb2 g4 46. h3 f3 47. gxf3 gxf3 48. Rd1 f2 49. h4 Re1 50. Rd7+ Ke8 51. Rb7 f1=Q 52. Rb8+ Kd7 53. Rb7+ Kc8 54. Rb6 Qg1+ 55. Kxc4 Qxb6 56. Ba1 Qc6+ 57. Kd4 Re4+ 58. Kd3 Qd5+ 59. Kc2 Re2+ 60. Kc1 Qh1#

[TracySMiller]

Game Two sees an exciting London opening with opposite side Castling, and it's a race to see which attack will strike home first. Defenchess uses its pieces wonderfully in an unbalanced endgame to get the win and take a 2-0 lead in the match.

WHITE Defenchess 2.2
BLACK DGT Centaur
RESULT 1-0

1. Nc3 d5 2. d4 Nf6 3. Nf3 Bf5 4. Bf4 e6 5. e3 Bd6 6. Ne5 O-O 7. g4 Bxe5 8. dxe5 Nxg4 9. f3 Nh6 10. h4 Nc6 11. Qe2 Nb4 12. O-O-O Bxc2 13. Bxh6 gxh6 14. Rd2 c5 15. Qh2 h5 16. Rxc2 Nxc2 17. Kxc2 a6 18. f4 b5 19. f5 Kh8 20. Kb1 b4 21. Ne2 Rb8 22. Qf4 Rg8 23. Bh3 b3 24. a3 Qe7 25. Ng3 c4 26. Nxh5 c3 27. Qh6 c2+ 28. Kc1 Qxh4 29. Qf6+ Qxf6 30. Nxf6 Rg5 31. Bg4 h5 32. Nxh5 exf5 33. Bf3 Kg8 34. Bxd5 Kf8 35. Nf6 Ke7 36. Bxb3 Rb5 37. Nd5+ Kf8 38. Bc4 Rb8 39. Nf6 Ke7 40. Rh7 Rf8 41. Bxa6 Rg1+ 42. Kxc2 Rg2+ 43. Kc3 Rg3 44. Kb4 Rg2 45. Nd5+ Kd7 46. Bb5+ Kc8 47. e6 Rxb2+ 48. Kc5 Kb8 49. Rxf7 Rc8+ 50. Kb6 Rxb5+ 51. Kxb5 Re8 52. Nc7 Rg8 53. e7 f4 54. Rf8+ Rxf8 55. exf8=Q+ Kxc7 56. Qe7+ Kc8 57. Kb6 f3 58. Qe8#

[TracySMiller]

DGT Centaur plays its best game yet, hanging with Defenchess with an equal position as late as move 36, but Defenchess again flexes its endgame muscles and maneuvers its way to yet another win, taking a commanding 3-0 lead in the match.

WHITE DGT Centaur
BLACK Defenchess 2.2
RESULT 0-1

1. c4 Nf6 2. g3 e5 3. Bg2 Bc5 4. Nc3 d6 5. e3 O-O 6. Nge2 Bb6 7. d4 Nc6 8. O-O h6 9. h3 exd4 10. exd4 Ne7 11. b4 c6 12. a4 a5 13. b5 Be6 14. Qb3 Rc8 15. Rb1 cxb5 16. Qxb5 Nd7 17. d5 Bf5 18. Ne4 Bc5 19. Bd2 Re8 20. Nf4 Ng6 21. Rbe1 b6 22. Nxg6 Bxg6 23. Nxc5 Rxc5 24. Rxe8+ Qxe8 25. Qa6 Qc8 26. Qxc8+ Rxc8 27. Re1 Nc5 28. Bf1 Nxa4 29. Bf4 Nb2 30. Bxd6 Nxc4 31. Bf4 b5 32. g4 a4 33. Kg2 f6 34. d6 Be8 35. Bxc4+ bxc4 36. Re7 Rd8 37. Kf1 c3 38. Ke1 Bf7 39. Re3 a3 40. Rxc3 g5 41. Bg3 a2 42. Ra3 Kf8 43. Kd2 Bd5 44. Kc3 Rc8+ 45. Kd4 Bb3 46. d7 Rc4+ 47. Kd5 Ke7 48. Rxb3 a1=Q 49. d8=Q+ Kxd8 50. Kxc4 Kd7 51. Rd3+ Ke8 52. Kc5 Qf1 53. Rd6 Ke7 54. Rb6 Qxh3 55. Rb7+ Ke6 56. Rb6+ Kf7 57. Rb7+ Kg6 58. Rb4 Qh1 59. Rd4 Qc1+ 60. Kb4 Qb2+ 61. Kc4 h5 62. gxh5+ Kxh5 63. Bd6 Qxf2 64. Rd5 f5 65. Be5 f4 66. Bd4 Qc2+ 67. Kb5 f3 68. Rd8 f2 69. Bxf2 Qxf2 70. Rh8+ Kg4 71. Rh6 Qf8 72. Rc6 Qe8 73. Kb6 Qxc6+ 74. Kxc6 Kf4 75. Kb5 g4 76. Kc4 g3 77. Kb3 g2 78. Kc4 g1=Q 79. Kb5 Ke5 80. Kc4 Qd4+ 81. Kb3 Kd5 82. Ka2 Kc4 83. Kb1 Kc3 84. Ka1 Kb3+ 85. Kb1 Qd1#

[TracySMiller]

DGT Centaur enters the endgame roughly equal, but again Defenchess shows why it is a master of endgame play. Defenchess now leads the match 4-0.

WHITE Defenchess
BLACK DGT Centaur
RESULT 1-0

1. d4 d6 2. e4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O Nc6 7. d5 Nb8 8. Re1 e6 9. Bg5 h6 10. Be3 Ng4 11. Bc1 exd5 12. exd5 Re8 13. h3 Ne5 14. Nxe5 Rxe5 15. Bf4 Re8 16. Qd2 Kh7 17. Bf1 Bd7 18. Be3 Qh4 19. Nb5 Bxb5 20. Bxb5 Rf8 21. Rab1 Rd8 22. c3 Nd7 23. f3 Nc5 24. b4 a6 25. bxc5 axb5 26. Rb4 Qf6 27. Bd4 Qg5 28. Qxg5 hxg5 29. cxd6 Bxd4+ 30. cxd4 Rxd6 31. Re7 Rc8 32. Rxb5 Kg8 33. Rxb7 Rxd5 34. Rbxc7 Rxc7 35. Rxc7 Ra5 36. Rc5 Rxa2 37. Rxg5 Kg7 38. Rd5 Rd2 39. g4 Kf6 40. h4 Re2 41. h5 gxh5 42. Rxh5 Ke6 43. d5+ Ke7 44. Kf1 Ra2 45. Re5+ Kf8 46. Rf5 Ra7 47. d6 Ra6 48. Rf6 Ra2 49. g5 Ra1+ 50. Kf2 Ra2+ 51. Ke3 Ke8 52. f4 Ra3+ 53. Kd4 Ra4+ 54. Ke5 Ra5+ 55. Kd4 Ra4+ 56. Kd5 Ra5+ 57. Kc6 Ra6+ 58. Kb5 Ra2 59. d7+ Kxd7 60. Rxf7+ Ke8 61. g6 Rb2+ 62. Kc6 Rc2+ 63. Kd6 Rd2+ 64. Ke6 Rb2 65. Kf6 Rb8 66. Kg7 Rb6 67. f5 Kd8 68. f6 Rb1 69. Re7 Ra1 70. Kf7 Rd1 71. g7 Rd7 72. g8=Q+ Kc7 73. Qg5 Kc6 74. Rxd7 Kxd7 75. Qc5 Kd8 76. Ke6 Ke8 77. Qe7#