End Game Knowledge

kingliveson · Post by **kingliveson** » Mon Sep 19, 2011 12:16 am

How good is Komodo to force a win here or was it inevitable?

[Event "60 Züge in 90 min; Rest in 30 min"] 
[Site "H2.0_STD_long, A1-PC"] 
[Date "2011.09.13"] 
[Round "2.2"] 
[White "Houdini 2.0 x64 x1"] 
[Black "Komodo64 3 sse"] 
[Result "0-1"] 
 
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 
e6 7. f4 Nbd7 8. Qe2 Qc7 9. O-O-O b5 10. a3 Bb7 11. g4 Be7 
12. Bh4 {+0.25/20 2:28m} Nb6 {+0.21/20 1:48m (h6)} 13. g5 
{+0.27/20 2:00m (Kb1)} Nfd7 {+0.14/18 29s} 14. f5 {+0.21/22 
10:25m (Kb1)} e5 {+0.21/19 41s} 15. Nf3 {+0.15/21 2:06m} 
Rc8 {+0.19/20 6s} 16. Bh3 {+0.16/21 1:14m} Qc4 {+0.14/22 
2:08m} 17. Rd3 {+0.27/21 1:46m (Dxc4)} Nc5 {+0.05/21 1:49m} 
18. f6 {+0.29/22 1:03m} Bxe4 {+0.05/21 1:02m} 19. Bxc8 
{+0.23/21 41s} Nxd3+ {+0.05/21 36s} 20. cxd3 {+0.30/22 53s 
(Kb1)} Bxd3 {+0.05/19 26s} 21. Qd2 {+0.30/23 1:33m} Nxc8 
{+0.43/22 1:19m} 22. fxe7 {+0.33/21 0s} e4 {+0.42/23 2:12m} 
23. Ne1 {+0.37/23 0s} d5 {+0.19/22 2:10m} 24. Qg2 {+0.37/22 
0s (Sxd3)} d4 {+0.60/21 2:44m} 25. Nxd3 {+0.37/22 0s} exd3 
{+0.50/20 40s} 26. Qd5 {+0.42/22 0s} Nxe7 {+0.57/22 1:36m} 
27. Qxc4 {+0.39/23 0s} bxc4 {+0.53/22 17s} 28. Na4 
{+0.38/26 1:47m} h6 {+0.63/24 1:07m} 29. g6 {+0.39/26 52s} 
fxg6 {+0.67/24 2:20m} 30. Nb6 {+0.37/27 1s (Te1)} Nf5 
{+0.64/26 3:12m} 31. Bf2 {+0.43/28 3:32m} Kf7 {+0.64/28 
2:24m} 32. Nxc4 {+0.43/28 19s} Rc8 {+0.67/26 46s} 33. b3 
{+0.44/27 0s} Nd6 {+0.64/26 1:04m} 34. Bg3 {+0.40/29 1:45m} 
Nxc4 {+0.66/27 1s} 35. bxc4 {+0.44/29 2:36m} Rxc4+ 
{+0.65/27 21s} 36. Kd2 {+0.39/29 3:20m} Rc3 {+0.66/29 
1:18m} 37. a4 {+0.38/28 2:37m} Ra3 {+0.66/27 7s} 38. Rc1 
{+0.35/26 4:07m} Rxa4 {+0.63/27 2:15m} 39. Kxd3 {+0.34/26 
0s} g5 {+0.63/23 34s} 40. Rc7+ {+0.25/26 16:37m (Le5)} Kf6 
{+0.63/24 51s} 41. Ke4 {+0.24/24 2:45m} d3+ {+0.61/24 
2:40m} 42. Kxd3 {+0.24/26 0s} g6 {+0.60/25 2:15m (h5)} 
43. Rc6+ {+0.43/23 1:25m (Kc3)} Kf5 {+0.59/22 12s} 44. Rc5+ 
{+0.41/25 1:31m (Tc2)} Ke6 {+0.54/23 34s (Kg4)} 45. Kc3 
{+0.40/25 2:39m} g4 {+0.57/27 29s} 46. Kb3 {+0.40/26 2:05m} 
Ra1 {+0.55/26 32s} 47. Rc6+ {+0.38/23 53s (Kb2)} Kf5 
{+0.47/23 1:10m} 48. Rc7 {+0.37/25 3s (Kb2)} h5 {+0.39/22 
50s} 49. Rh7 {+0.33/25 3:05m (Tf7+)} Rc1 {+0.33/24 5:12m 
(Ke4)} 50. Rh8 {+0.31/24 2:33m (Kb2)} Rc6 {+0.28/25 2:54m 
(a5)} 51. Ka4 {+0.33/24 52s (Kb4)} Ke4 {+0.10/26 1:02m 
(Tc2)} 52. Kb4 {+0.23/24 2:16m (Th7)} Kf3 {+0.05/28 2:14m 
(Tb6+)} 53. Rh6 {+0.03/23 2:18m (Th7)} Kg2 {0.00/25 1:02m} 
54. Kb3 {0.00/25 0s (Th7)} Re6 {0.00/28 1:52m (Tb6+)} 
55. Ka4 {0.00/26 42s (Kc4)} Rb6 {-0.01/28 5:53m (Kh3)} 
56. Bc7 {-0.02/28 44s (Ka5)} Rc6 {0.00/28 4:17m} 57. Bb8 
{-0.02/32 0s (Lg3)} Kh3 {-0.02/27 4:35m} 58. Be5 {-0.02/32 
0s} Rb6 {-0.02/29 8:32m} 59. Bc7 {-0.02/34 0s (Lf4)} Re6 
{0.00/26 1:38m (Tc6)} 60. Kb4 {-0.02/31 3:39m (Kb3)} Rc6 
{+0.03/27 2:06m} 61. Bf4 {-0.02/30 0s (Lg3)} Rf6 {0.00/24 
32s} 62. Be5 {-0.02/30 26s (Lg3)} a5+ {+0.01/25 58s (Te6)} 
63. Ka4 {-0.02/28 36s} Re6 {+0.01/26 8s} 64. Bg3 {-0.02/29 
33s} Re3 {+0.01/25 1s} 65. Bc7 {-0.02/29 34s (Ld6)} Re7 
{0.00/26 47s} 66. Bb8 {-0.02/31 3:54m (Ld6)} Re1 {0.00/25 
31s (Te8)} 67. Ka3 {-0.04/27 30s (Kxa5)} Re6 {-0.26/23 35s 
(Te8)} 68. Bc7 {-0.23/24 1:26m (Th7)} Rc6 {-0.22/24 34s 
(h4)} 69. Be5 {-0.34/23 31s (Lf4)} h4 {-0.39/24 43s} 
70. Ka4 {-0.34/25 31s (Kb3)} Rc5 {-0.67/24 20s} 71. Bd6 
{-0.37/25 7s} Rd5 {-0.69/24 10s} 72. Bc7 {-0.41/25 38s} Rd7 
{-0.68/25 4s (Td4+)} 73. Bb8 {-0.65/23 34s (Le5)} Rd4+ 
{-0.85/23 20s} 74. Ka3 {-0.65/26 5s} g5 {-1.07/25 43s} 
75. Rc6 {-0.73/26 1:04m (Tg6)} g3 {-1.11/23 18s} 76. hxg3 
{-0.72/25 0s} hxg3 {-1.22/24 32s} 77. Rc3 {-0.72/27 0s} Rf4 
{-1.22/21 1s} 78. Rc5 {-0.91/25 2:02m (Lc7)} Kg4 {-1.51/24 
29s} 79. Ba7 {-1.21/26 1:49m (Txa5)} g2 {-1.86/19 7s} 
80. Rxa5 {-1.28/26 28s (Lb6)} Rf1 {-1.86/26 22s (Kh4)} 
81. Kb4 {-1.44/24 33s (Kb3)} g1=Q {-3.28/22 13s (Kh4)} 
82. Bxg1 {-1.61/22 6s} Rxg1 {-3.13/25 0s} 83. Kc5 {-2.09/26 
2:17m (Kc4)} Rd1 {-4.57/28 21s (Kf4)} 84. Rb5 {-2.13/23 19s 
(Kb6)} Kh4 {-4.69/30 10s} 85. Rb8 {-2.94/23 1:42m (Tb7)} g4 
{-4.83/27 7s} 86. Rh8+ {-3.40/21 1:27m} Kg3 {-4.83/34 0s} 
87. Rg8 {-2.96/20 15s (Tb8)} Kf3 {-4.83/27 4s (Kf4)} 
88. Rf8+ {-5.43/20 59s (Kc4)} Kg2 {-6.33/25 3s} 89. Kb4 
{-5.47/20 8s (Tg8)} g3 {-6.18/27 18s} 0-1

Source: http://www.clemens-keck.de/Houdini2.0_STD-long.html

Uly · Post by **Uly** » Mon Sep 19, 2011 1:56 am

I don't know, but apparently chances are Houdini would have panicked and just exchanged the Rook for the pawn, directly losing the game.

[Event "2 Minutes/Game"] 
[Site "Engine Match"] 
[Date "2011.09.18"] 
[Round "1"] 
[White "Houdini 1.5 x64"] 
[Black "Komodo"] 
[Result "0-1"] 
 
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 
e6 7. f4 Nbd7 8. Qe2 Qc7 9. O-O-O b5 10. a3 Bb7 11. g4 Be7 
12. Bh4 Nb6 13. g5 Nfd7 14. f5 e5 15. Nf3 Rc8 16. Bh3 Qc4 
17. Rd3 Nc5 18. f6 Bxe4 19. Bxc8 Nxd3+ 20. cxd3 Bxd3 
21. Qd2 Nxc8 22. fxe7 e4 23. Ne1 d5 24. Qg2 d4 25. Nxd3 
exd3 26. Qd5 Nxe7 27. Qxc4 bxc4 28. Na4 h6 29. g6 fxg6 
30. Nb6 Nf5 31. Bf2 Kf7 32. Nxc4 Rc8 33. b3 Nd6 34. Bg3 
Nxc4 35. bxc4 Rxc4+ 36. Kd2 Rc3 37. a4 Ra3 38. Rc1 Rxa4 
39. Kxd3 g5 40. Rc7+ Kf6 41. Ke4 d3+ 42. Kxd3 g6 43. Rc6+ 
Kf5 44. Rc5+ Ke6 45. Kc3 g4 46. Kb3 Ra1 47. Rc6+ Kf5 
48. Rc7 h5 49. Rh7 Rc1 50. Rh8 Rc6 51. Ka4 Ke4 52. Kb4 Kf3 
53. Rh6 Kg2 54. Kb3 Re6 55. Ka4 Rb6 56. Bc7 Rc6 57. Bb8 Kh3 
58. Be5 Rb6 59. Bc7 Re6 60. Kb4 Rc6 61. Bf4 Rf6 62. Be5 a5+ 
63. Ka4 Re6 64. Bg3 Re3 65. Bc7 Re7 66. Bb8 Re1 67. Ka3 Re6 
68. Bc7 Rc6 69. Be5 h4 70. Ka4 Rc5 71. Bd6 Rd5 72. Bc7 Rd7 
73. Bb8 Rd4+ 74. Ka3 g5 75. Rc6 g3 76. hxg3 hxg3 77. Rc3 
Rf4 78. Rc5 Kg4 79. Ba7 g2 80. Rxa5 Rf1 81. Kb4 g1=Q 
82. Bxg1 Rxg1 83. Kc5 Rd1 84. Rb5 Kh4 85. Rb8 g4 86. Rh8+ 
Kg3 87. Rg8 Kf3 88. Rf8+ Kg2 89. Kb4 g3 90. Kc3 {-5.64/19 
2s} Kg1 {-3.78/14 2s (Kh2)} 91. Kc2 {-5.75/23 1s} Rd6 
{-3.85/14 0s (Rd7)} 92. Rf4 {-5.82/22 2s (Rh8)} g2 
{-4.37/11 0s} 93. Kc3 {-5.91/25 1s (Rf8)} Kh2 {-4.68/17 1s} 
94. Rf2 {-12.75/25 18s (Rf7)} Kg3 {-4.80/20 2s} 95. Rxg2+ 
{-6.28/22 0s} Kxg2 {-4.80/20 0s} 96. Kc4 {-M15/30 1s} Kf3 
{-4.83/24 1s} 97. Kc5 {-M13/36 1s} Rd1 {-5.27/22 1s} 
98. Kc4 {-M12/34 0s} Ke4 {-M14/21 1s (Ke3)} 99. Kc5 
{-M11/32 0s} Rd5+ {-M12/18 0s (Rd4)} 100. Kc4 {-M11/32 0s} 
Ra5 {-M12/17 0s (Rg5)} 101. Kb4 {-M11/32 0s} Rg5 {-M12/18 
0s} 102. Kc3 {-M10/30 0s} Rc5+ {-M10/15 0s} 103. Kb4 
{-M9/28 0s} Kd4 {-M8/14 0s} 104. Kb3 {-M8/26 0s} Rd5 
{-M7/13 0s} 105. Kb4 {-M7/24 0s} Kd3 {-M6/11 0s} 106. Kb3 
{-M6/22 0s} Rb5+ {-M5/9 0s} 107. Ka4 {-M5/20 0s} Kc4 {-M4/8 
0s} 108. Ka3 {-M4/1 0s} Kc3 {-M3/6 0s (Rb8)} 109. Ka2 
{-M3/16 0s} Ra5+ {-M2/3 0s} 110. Kb1 {-M2/1 0s} Ra4 {-M1/2 
0s (Ra6)} 111. Kc1 {-M1/1 0s} Ra1# {-M0/1 0s} 0-1

kingliveson · Post by **kingliveson** » Tue Sep 20, 2011 3:42 am

Critter 1.2 Linux and IvanHoe 9.47b Linux ("special"), both using single core with ponder-on, and no egtb. The starting position is quite favorable to black, and I thought this should have been draw:

[Event "Computer Chess Game"] 
[Site "openSUSE"] 
[Date "2011.09.19"] 
[Round "2"] 
[White "IvanHoe 9.47b x64"] 
[Black "Critter 1.2 64-bit SSE4"] 
[Result "1-0"] 
[TimeControl "300+3"] 
[Annotator "5. -0.30 5... +0.33"] 
 
1. h3 e5 2. c3 d5 3. d4 Nc6 4. Be3 Nf6 5. dxe5 {-0.30/20 13} Nxe5 
{+0.33/19 17} 6. Nd2 {-0.32/21 0.1} Bd6 {+0.46/19 15} 7. Ngf3 
{-0.32/21 0.1} Ng6 {+0.35/20 34} 8. c4 {-0.29/19 28} O-O {+0.36/17 20} 9. 
c5 {-0.33/20 0.1} Be7 {+0.45/19 12} 10. Qc2 {-0.34/20 0.1} b6 {+0.41/19 35} 
11. Rc1 {-0.31/20 0.1} Nd7 {+0.41/18 11} 12. b4 {-0.38/19 21} bxc5 
{+0.37/17 14} 13. bxc5 {-0.26/19 11} Rb8 {+0.34/18 0.1} 14. g3 
{-0.18/19 10} Bf6 {+0.30/18 0.1} 15. Nd4 {-0.17/19 18} Ne7 {+0.26/18 10} 
16. N2f3 {-0.21/20 0.1} Rb4 {+0.32/18 10} 17. Qd3 {-0.35/19 11} Ne5 
{+0.32/18 0.1} 18. Nxe5 {-0.28/20 8} Bxe5 {+0.40/20 0.1} 19. Qd2 
{-0.29/21 9} Ra4 {+0.39/19 7} 20. Bg2 {-0.33/21 0.1} c6 {+0.39/19 10} 21. 
O-O {-0.41/21 0.1} Ba6 {+0.39/17 8} 22. Rfd1 {-0.39/18 14} Qd7 
{+0.39/18 0.1} 23. Nf3 {-0.18/19 17} Bc7 {+0.26/18 0.3} 24. Bd4 
{-0.12/19 30} Ba5 {+0.22/18 0.7} 25. Qc2 {+0.06/18 4} Rc4 {+0.00/17 10} 26. 
Qb3 {+0.09/20 0.1} Bc7 {-0.06/17 9} 27. Rxc4 {+0.18/19 4} Bxc4 
{-0.06/18 0.1} 28. Qc2 {+0.13/20 4} Qf5 {-0.04/18 5} 29. Qc3 {+0.12/20 0.1} 
f6 {-0.17/19 28} 30. e4 {+0.11/22 0.1} Qe6 {-0.10/19 12} 31. Re1 
{+0.20/21 0.1} Qf7 {-0.27/19 9} 32. exd5 {+0.20/20 0.1} Bxd5 {-0.03/17 5} 
33. Qe3 {+0.20/20 0.1} Nf5 {-0.04/17 8} 34. Qd3 {+0.17/21 0.1} Qg6 
{-0.07/18 11} 35. Bc3 {+0.17/20 0.1} Rd8 {-0.04/17 6} 36. Qe2 {+0.10/19 20} 
h5 {+0.00/17 5} 37. Qc2 {+0.10/19 5} Kh7 {-0.07/17 1.6} 38. a3 
{+0.07/18 16} Rb8 {+0.00/17 7} 39. a4 {+0.04/19 0.1} Rd8 {+0.00/17 8} 40. 
Qb1 {+0.04/19 10} Rb8 {+0.00/18 7} 41. Qd3 {+0.04/21 0.1} Rd8 {+0.00/18 8} 
42. Qc2 {+0.04/19 2.3} a5 {+0.00/18 6} 43. Qb1 {+0.16/20 11} Rb8 
{+0.00/18 4} 44. Qd3 {+0.16/19 0.1} Rd8 {+0.00/18 5} 45. Qc2 {+0.17/19 7} 
Rd7 {+0.00/19 0.1} 46. Re2 {+0.23/19 8} Rd8 {+0.00/18 6} 47. Qb1 
{+0.17/19 0.1} Kh8 {-0.17/16 12} 48. Ne1 {+0.20/21 0.1} Rb8 {-0.16/16 5} 
49. Qd3 {+0.17/21 24} Rd8 {-0.02/18 6} 50. Qc2 {+0.18/21 0.1} Qg5 
{-0.14/16 5} 51. Bxd5 {+0.28/19 10} Rxd5 {-0.31/17 0.1} 52. Nf3 
{+0.41/20 8} Qg6 {-0.21/20 0.1} 53. Be1 {+0.41/21 3} Qf7 {-0.22/19 2.1} 54. 
Rd2 {+0.35/20 0.5} Rxd2 {-0.20/18 5} 55. Qxd2 {+0.43/20 0.1} Qe6 
{-0.28/20 6} 56. Qd3 {+0.40/21 0.1} Kg8 {-0.26/19 5} 57. Kg2 {+0.36/20 4} 
Kf7 {-0.22/19 0.2} 58. Bc3 {+0.25/21 10} Qd5 {-0.25/19 0.1} 59. Qxd5+ 
{+0.30/22 4} cxd5 {-0.25/21 0.1} 60. Kf1 {+0.23/23 5} Ke6 {-0.20/22 0.7} 
61. Ke2 {+0.28/22 2.6} d4 {-0.20/22 3} 62. Nxd4+ {+0.27/23 25} Nxd4+ 
{-0.21/25 0.2} 63. Bxd4 {+0.27/24 4} Kd5 {-0.21/24 0.2} 64. Kd3 
{+0.27/23 4} Bd8 {-0.21/22 2.5} 65. c6 {+0.29/22 0.1} Kxc6 {-0.21/23 6} 66. 
Ke4 {+0.29/23 0.1} g6 {-0.33/22 11} 67. f4 {+0.37/23 0.1} Kd6 {-0.34/22 5} 
68. f5 {+0.43/23 0.1} g5 {-0.34/20 0.1} 69. g4 {+0.66/23 5} hxg4 
{-0.83/23 4} 70. hxg4 {+1.22/24 0.1} Kc6 {-1.16/21 0.1} 71. Be3 
{+2.16/23 5} Bc7 {-2.03/24 6} 72. Ba7 {+2.44/24 0.1} Be5 {-2.03/26 5} 73. 
Kd3 {+2.89/24 0.1} Kc7 {-2.03/27 5} 74. Be3 {+3.53/23 0.1} Kd7 {-2.08/26 5} 
75. Bb6 {+4.78/22 8} Bc7 {-2.37/25 5} 76. Bd4 {+4.94/24 0.1} Be5 
{-2.77/24 7} 77. Bxe5 {+10.91/24 2.6} fxe5 {-6.07/30 1.0} 78. Ke4 
{+11.00/30 2.7} Kd6 {-7.51/32 4} 79. f6 {+11.12/33 0.1} Ke6 {-6.98/30 7} 
80. f7 {+11.44/36 0.1} Kxf7 {-6.98/29 6} 81. Kxe5 {+11.59/36 0.1} Kg6 
{-6.98/28 5} 82. Ke6 {+12.32/36 0.1} Kg7 {-6.98/26 5} 83. Kf5 
{+13.32/35 0.1} Kh6 {-6.98/24 4} 84. Kf6 {+11.59/33 7} Kh7 {-8.37/22 0.1} 
85. Kxg5 {+99.13/33 29} Kg7 {-21.61/35 0.1} 86. Kf5 {+99.63/33 6} Kf7 
{-99.52/32 0.1} 87. Ke4 {+99.63/34 2.3} Ke6 {-99.54/30 2.5} 88. Kd4 
{+99.69/30 6} Kf7 {-99.60/27 0.1} 89. Kc4 {+99.69/34 7} Ke6 {-99.62/26 0.1} 
90. Kb5 {+99.69/33 7} Kd6 {-99.70/34 0.1} 91. g5 {+99.73/32 16} Ke5 
{-99.72/38 5} 92. Kxa5 {+99.73/32 6} Kf5 {-99.74/39 0.1} 93. Kb5 
{+99.73/31 15} Kxg5 {-99.76/48 0.1} 94. a5 {+99.79/32 5} Kf6 
{-99.78/51 0.6} 95. a6 {+99.81/34 10} Kg6 {-99.80/56 0.1} 96. Kb6 
{+99.81/35 4} Kf5 {-99.80/55 4} 97. a7 {+99.83/37 4} Ke4 {-99.82/56 0.1} 
98. Kb5 {+99.83/36 4} Kd4 {-99.82/55 4} 99. a8=Q {+99.85/38 2.4} Ke3 
{-99.84/56 0.1} 100. Qd5 {+99.87/39 4} Kf4 {-99.86/56 0.1} 101. Kc4 
{+99.89/39 1.7} Kg4 {-99.88/56 0.1} 102. Kd3 {+99.91/39 1.6} Kf4 
{-99.90/56 0.1} 103. Ke2 {+99.93/40 4} Kg4 {-99.92/56 0.1} 104. Qe5 
{+99.93/42 2.6} Kh3 {-99.94/56 0.1} 105. Kf3 {+99.95/43 1.9} Kh4 
{-99.96/56 0.1} 106. Qd5 {+99.97/45 4} Kh3 {-99.98/56 0.1} 107. Qh5# 
{+99.99/125 0.1} 
{Xboard adjudication: Checkmate} 1-0

kingliveson · Post by **kingliveson** » Wed Sep 21, 2011 1:53 am

Is IvanHoe "special" brilliant or Critter has pawn endings weakness? Ponder-on, 1 core, 15+10 tc, 256 MB hash, egtb off. Score from engine's POV.

[Event "Computer Chess Game"] 
[Site "openSUSE"] 
[Date "2011.09.20"] 
[Round "8"] 
[White "Critter 1.2 64-bit SSE4"] 
[Black "IvanHoe 9.47b x64"] 
[Result "0-1"] 
[TimeControl "900+10"] 
[Annotator "5. +0.38 5... -0.44"] 
 
1. d4 d6 2. e4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 {+0.38/20 52} Nc6 
{-0.44/22 1:02} 6. d5 {+0.39/20 46} Nb8 {-0.39/23 2:12} 7. O-O 
{+0.40/19 44} O-O {-0.39/22 0.1} 8. Be3 {+0.38/19 43} c6 {-0.34/21 0.1} 9. 
a4 {+0.33/18 41} Nbd7 {-0.30/20 1:32} 10. Nd2 {+0.31/19 44} Nc5 
{-0.32/20 0.1} 11. a5 {+0.31/20 2:04} Qc7 {-0.30/21 0.1} 12. f3 
{+0.32/19 1:55} cxd5 {-0.09/20 1:11} 13. exd5 {+0.30/21 0.1} e6 
{-0.23/21 30} 14. dxe6 {+0.14/19 38} Bxe6 {-0.07/20 0.1} 15. Bd4 
{+0.12/19 30} d5 {-0.17/21 0.1} 16. Nb5 {+0.18/19 30} Qe7 {-0.14/23 0.1} 
17. b4 {+0.25/19 18} Ncd7 {-0.17/22 0.1} 18. a6 {+0.23/19 26} bxa6 
{-0.14/22 20} 19. Rxa6 {+0.16/20 8} Qxb4 {-0.11/22 42} 20. c3 
{+0.21/20 0.1} Qe7 {+0.00/22 43} 21. Nb3 {+0.14/20 0.1} Nh5 {+0.00/21 1:05} 
22. Qd2 {+0.09/19 0.1} Bxd4+ {+0.00/20 24} 23. cxd4 {+0.11/20 4} Nb8 
{+0.00/21 11} 24. Raa1 {+0.07/20 28} Nc6 {+0.00/21 24} 25. Nc5 {+0.10/19 4} 
Rab8 {+0.14/20 1:31} 26. Rfc1 {+0.08/18 29} Ng7 {+0.14/19 0.1} 27. Rc3 
{+0.00/17 28} Nf5 {+0.35/19 35} 28. g4 {-0.07/17 27} Nh4 {+0.20/21 0.1} 29. 
Qe3 {+0.00/17 24} Rb6 {+0.25/19 24} 30. Kh1 {+0.00/18 26} Rd8 {+0.32/19 48} 
31. h3 {-0.07/18 35} Rf8 {+0.25/19 0.1} 32. f4 {+0.00/18 24} Rfb8 
{+0.10/18 25} 33. Bf1 {+0.00/18 0.1} Qf6 {+0.00/20 27} 34. Rac1 
{+0.00/18 8} Nb4 {+0.00/20 0.1} 35. Re1 {+0.04/18 24} Na6 {+0.35/20 27} 36. 
Nxa6 {+0.00/19 24} Rxa6 {+0.30/20 0.1} 37. Qg3 {+0.00/20 23} Bd7 
{+0.21/22 0.1} 38. Nc7 {+0.00/20 22} Ra5 {+0.29/20 0.1} 39. Na6 
{+0.00/19 22} Re8 {+0.00/21 26} 40. Nc5 {+0.00/20 0.1} Rxe1 {+0.00/21 16} 
41. Qxe1 {+0.00/21 0.1} Bc6 {+0.00/21 9} 42. Nd3 {+0.00/21 6} Ra4 
{+0.00/21 4} 43. Ne5 {+0.00/18 16} Rxd4 {+0.00/21 0.1} 44. Nxc6 
{+0.00/19 22} Rxf4 {+0.20/21 22} 45. Rc1 {+0.00/21 0.1} Rc4 {+0.21/21 19} 
46. Ne7+ {-0.05/20 3} Kf8 {+0.60/22 51} 47. Rxc4 {-0.33/21 0.1} dxc4 
{+0.66/22 17} 48. Nd5 {-0.27/21 4} Qf3+ {+0.63/23 11} 49. Kg1 {-0.41/23 12} 
Qxd5 {+0.63/23 0.1} 50. Qxh4 {-0.30/21 0.1} c3 {+0.63/24 51} 51. Qh6+ 
{-0.35/23 0.1} Kg8 {+0.63/25 36} 52. Qe3 {-0.33/24 0.1} Qc6 {+0.63/24 22} 
53. Bd3 {-0.35/23 2.4} c2 {+0.63/23 4} 54. Qc1 {-0.34/23 20} Qf3 
{+0.86/21 16} 55. Qxc2 {-0.35/22 8} Qg3+ {+0.86/22 0.1} 56. Kf1 
{-0.44/23 24} Qxh3+ {+0.88/22 0.1} 57. Kf2 {-0.44/22 23} Qxg4 
{+0.95/22 0.1} 58. Qc5 {-0.47/20 16} Qf4+ {+0.95/21 0.1} 59. Ke2 
{-0.54/20 29} Qh2+ {+0.98/21 0.1} 60. Kf3 {-0.53/20 19} Qh3+ {+1.02/22 0.1} 
61. Ke2 {-0.60/21 20} Qd7 {+1.02/21 0.1} 62. Be4 {-0.64/19 40} h5 
{+1.14/19 27} 63. Bf3 {-0.75/19 6} Qe6+ {+1.30/19 22} 64. Kf1 {-0.83/18 21} 
Qb6 {+1.31/21 0.1} 65. Qe5 {-0.81/20 20} Qd8 {+1.31/21 0.1} 66. Qg3 
{-0.86/19 26} Qd3+ {+1.53/20 25} 67. Kg2 {-0.93/20 17} Qc2+ {+1.54/22 0.1} 
68. Kh3 {-0.97/20 14} Qc3 {+1.76/22 21} 69. Kg2 {-1.21/21 31} a5 
{+1.79/22 11} 70. Qb8+ {-1.25/20 3} Kg7 {+1.94/23 58} 71. Qf4 
{-1.34/21 0.1} Qf6 {+1.80/22 14} 72. Qa4 {-1.48/19 18} Qb2+ {+1.92/22 0.1} 
73. Kf1 {-1.31/18 18} Qb4 {+1.84/22 0.1} 74. Qa1+ {-1.56/20 18} f6 
{+1.95/22 0.2} 75. Bd1 {-1.46/20 17} h4 {+1.91/22 0.1} 76. Qc1 
{-1.48/21 21} Qb5+ {+1.91/22 0.1} 77. Kg1 {-1.43/21 17} Qg5+ {+4.73/23 19} 
78. Qxg5 {-3.24/21 6} fxg5 {+5.91/24 20} 79. Kh2 {-3.77/25 0.8} g4 
{+7.14/26 46} 80. Kg2 {-4.67/23 0.1} Kf6 {+7.61/23 18} 81. Ba4 {-5.12/21 7} 
Kg5 {+11.28/20 16} 82. Bd7 {-10.26/22 25} Kf4 {+12.38/26 31} 83. Be6 
{-11.31/18 17} a4 {+16.50/18 12} 84. Bf7 {-11.41/17 2.3} h3+ {+20.51/18 16} 
85. Kh2 {-19.43/20 22} Kf3 {+22.24/19 0.1} 86. Bxg6 {-25.17/19 20} g3+ 
{+99.79/20 32} 87. Kxh3 {-99.76/29 0.1} g2 {+99.79/20 5} 88. Bh5+ 
{-99.78/30 10} Kf2 {+99.79/21 0.1} 89. Kg4 {-99.80/29 12} g1=Q+ 
{+99.83/21 0.1} 90. Kf5 {-99.82/29 16} Qg8 {+99.83/21 0.1} 91. Kf6 
{-99.84/30 12} Qh8+ {+99.85/20 0.1} 92. Kg5 {-99.86/34 13} a3 
{+99.87/19 25} 93. Bf7 {-99.88/55 0.1} Qg7+ {+99.89/19 24} 94. Kf5 
{-99.90/56 0.1} Qxf7+ {+99.91/19 7} 95. Ke4 {-99.92/56 0.1} a2 
{+99.93/20 22} 96. Ke5 {-99.94/56 0.1} a1=Q+ {+99.95/19 12} 97. Kd6 
{-99.96/56 0.1} Qa5 {+99.97/19 7} 98. Kc6 {-99.98/56 0.1} Qfd5# 
{+99.99/125 0.1} 
{Xboard adjudication: Checkmate} 0-1

OpenChess

OpenChess

End Game Knowledge

End Game Knowledge

Re: End Game Knowledge

Re: End Game Knowledge

Re: End Game Knowledge