Skippers two month record

[Henk]

First time in about two months Skipper won a game from Fairy-Max.
Although it is still the special case when opponent castling long.

The more you try to optimize the more bugs.

[pgn] [Event "Computer Chess Game"] [Site "LAPTOP-1FK7MTIP"] [Date "2019.10.29"] [Round "-"] [White "SchaakMachine"] [Black "Fairy-Max 4.8V"] [Result "1-0"] [TimeControl "120"] [Annotator "1. +0.08 1... +0.15"] 1. c3 {+0.08/7} d6 {+0.15/8 2.4} 2. e4 {+0.32/8 2.4} c6 {+0.15/7 1.6} 3. d4 {+0.16/7 2.3} f6 {+0.10/7 1.7} 4. Bd3 {+0.75/6 2.3} Be6 {-0.14/8 2.0} 5. Nd2 {+0.91/6 2.2} Nd7 {-0.04/9 2.5} 6. Be2 {+0.69/7 2.2} Qc7 {-0.10/8 1.8} 7. Nh3 {+0.81/7 2.1} d5 {-0.04/9 4} 8. O-O {+0.60/7 2.1} O-O-O {+0.22/9 2.1} 9. c4 {+0.62/7 2.1} Nh6 {-0.12/9 3} 10. cxd5 {+0.78/7 2.0} cxd5 {-0.13/9 3} 11. Qa4 {+0.71/6 2.0} a6 {-0.08/9 4} 12. Qd1 {+1.00/6 1.9} g5 {+0.03/8 2.7} 13. f3 {+0.61/6 1.9} Bg7 {-0.01/8 2.8} 14. Nf2 {+0.53/6 1.9} b5 {-0.03/8 5} 15. a4 {+1.65/6 1.8} Qc6 {-0.09/8 1.8} 16. axb5 {+1.75/6 1.8} axb5 {-0.67/9 1.1} 17. Ra5 {+2.18/7 1.8} dxe4 {-0.84/8 1.3} 18. fxe4 {+2.30/6 1.7} Qc7 {-0.80/8 1.3} 19. Rxb5 {+2.43/6 1.7} Qd6 {-1.00/7 1.2} 20. Qa4 {+3.34/6 1.6} Rdf8 {-3.80/9 1.6} 21. d5 {+5.53/6 1.6} Nb8 {-5.65/9 4} 22. Nc4 {+6.79/5 1.6} Qc7 {-7.39/9 0.9} 23. dxe6 {+9.42/5 1.6} Nf5 {-11.24/9 2.8} 24. exf5 {+13.33/5 1.5} Qc6 {-14.98/9 1.6} 25. Rxb8+ {+23.00/7 1.5} Kxb8 {-79.96/14 1.0} 26. Qxc6 {+23.01/5 1.5} Rd8 {-79.97/18 0.8} 27. Qb6+ {+19.07/2 1.4} Kc8 {-79.98/28 0.1} 28. Nd6+ exd6 {-79.99/28 0.1} 29. Ba6# {Xboard adjudication: Checkmate} 1-0 [/pgn]

[flok]

First time in about two months Skipper won a game from Fairy-Max.

I'd say Skipper is ready for the CSVN tournament! 7/8 December in Gouda. Check out the details at www.csvn.nl

[Henk]

Another win. I see last win was 1.5 month ago. Not a great track record.

[pgn] [Event "Computer Chess Game"] [Site "LAPTOP-1FK7MTIP"] [Date "2019.12.03"] [Round "-"] [White "SchaakMachine"] [Black "Fairy-Max 4.8V"] [Result "1-0"] [TimeControl "120"] [Annotator "1. -0.01 7... -0.02"] 1. e4 {-0.01/8} d6 2. d4 {+0.45/8 2.4} Nf6 3. Nc3 {+0.42/7 2.3} e5 4. dxe5 {+1.09/8 2.3} dxe5 5. Qxd8+ {+1.16/9 2.2} Kxd8 6. Bg5 {+1.06/8 2.2} Be6 7. Nf3 {+1.00/7 2.1} h6 {-0.02/9 1.9} 8. Bxf6+ {+0.87/7 2.1} gxf6 {+0.25/9 1.8} 9. Nd5 {+0.93/7 2.0} Nd7 {+0.25/10 2.7} 10. O-O-O {+0.80/7 2.0} Bg7 {+0.35/10 2.3} 11. Kb1 {+0.84/6 2.0} f5 {+0.41/9 2.0} 12. exf5 {+0.93/7 1.9} Bxf5 {+0.26/10 4} 13. Rd2 {+0.93/7 1.9} c5 {+0.30/8 1.3} 14. Rd1 {+1.28/7 1.9} Be6 {+0.25/9 1.6} 15. Bb5 {+1.22/7 1.8} Re8 {+0.34/9 4} 16. Rhe1 {+1.20/7 1.8} Rb8 {+0.28/8 1.3} 17. Re3 {+1.13/7 1.7} b6 {+0.28/8 2.7} 18. h3 {+1.32/7 1.7} a5 {+0.28/7 1.5} 19. g4 {+1.62/7 1.7} f6 {-0.09/9 1.9} 20. Nh4 {+1.76/6 1.6} Bh8 {-0.49/9 1.9} 21. Nf5 {+2.60/7 1.6} h5 {-0.36/9 1.4} 22. Nd6 {+1.87/7 1.6} Rf8 {-0.94/10 2.3} 23. gxh5 {+2.46/7 1.5} f5 {-1.33/10 5} 24. Nc4 {+2.83/6 1.5} Rf7 {-1.78/9 1.9} 25. Ndxb6 {+4.08/7 1.5} e4 {-2.42/9 1.8} 26. Bxd7 {+3.86/6 1.5} Bxc4 {-2.95/10 1.9} 27. Ba4+ {+4.50/7 1.4} Bd3 {-3.28/10 1.8} 28. Nc4 {+4.88/8 1.4} Rb4 {-3.32/11 2.3} 29. b3 {+5.36/8 1.4} Bd4 {-3.52/11 1.4} 30. cxd3 {+5.25/8 1.4} Bxe3 {-3.64/11 1.1} 31. fxe3 {+5.40/8 1.3} Kc7 {-4.21/11 1.6} 32. dxe4 {+5.19/8 1.3} fxe4 {-4.11/11 1.2} 33. h6 {+5.31/7 1.3} Rh7 {-4.30/10 0.8} 34. Rd6 {+5.43/7 1.2} Rb7 {-4.28/10 0.9} 35. Rg6 {+5.60/8 1.2} Kd8 {-4.31/10 0.9} 36. Bc6 {+6.42/8 1.2} Rbe7 {-4.43/10 0.9} 37. Nd6 {+6.15/8 1.2} Rh8 {-4.65/11 1.2} 38. Bd5 {+6.31/7 1.1} Rf8 {-4.34/10 1.5} 39. Nxe4 {+6.20/7 1.1} Rf1+ {-4.41/10 6} 40. Kb2 {+6.47/7 1.1} Re1 {-4.58/9 1.2} 41. Rg8+ {+6.45/8 1.1} Kd7 {-5.38/8 1.3} 42. Nf6+ {+8.02/8 1.1} Kd6 {-6.02/10 2.8} 43. Bc4 {+8.03/7 1.0} R1xe3 {-5.54/9 0.6} 44. h7 {+8.59/9 1.0} Rxh3 {-5.88/11 1.0} 45. h8=R {+8.51/9 1.0} Rxh8 {-5.93/13 1.2} 46. Rxh8 {+8.51/9 1.0} Ke5 {-5.94/11 1.0} 47. Nd5 {+8.01/9 1.0} Rd7 {-5.78/10 2.5} 48. a3 {+8.04/9 0.9} Rg7 {-5.96/9 0.5} 49. Nc3 {+8.01/9 0.9} Kf4 {-6.26/9 0.7} 50. Ra8 {+8.60/9 0.9} Rg2+ {-6.32/11 0.7} 51. Kc1 {+8.97/10 0.9} a4 {-6.36/10 0.7} 52. bxa4 {+8.85/9 0.9} Ke3 {-6.79/10 1.5} 53. Nd1+ {+9.23/8 0.9} Kf4 {-6.99/11 1.3} 54. a5 {+9.85/9 0.8} Rg3 {-7.05/10 0.8} 55. a6 {+9.78/8 0.8} Rxa3 {-7.91/10 1.2} 56. a7 {+10.02/9 0.8} Ke5 {-9.39/11 1.2} 57. Nb2 {+12.64/9 0.8} Ra1+ {-9.41/11 0.7} 58. Kc2 {+12.02/9 0.8} Kf5 {-9.36/10 0.5} 59. Rf8+ {+12.03/10 0.8} Ke4 {-10.08/11 0.9} 60. a8=Q+ {+12.74/8 0.7} Rxa8 {-10.25/11 0.5} 61. Rxa8 {+13.75/10 0.7} Kd4 {-10.28/11 0.7} 62. Ra5 {+12.84/10 0.7} Ke3 {-10.31/11 0.6} 63. Rxc5 {+12.87/10 0.7} Kf3 {-10.62/11 1.1} 64. Kd3 {+12.88/10 0.7} Kf4 {-10.86/11 0.4} 65. Be6 {+12.91/11 0.7} Kf3 {-11.12/11 0.4} 66. Rc4 {+12.91/9 0.7} Kg3 {-79.94/11 0.5} 67. Ke2 {+12.92/9 0.6} Kg2 {-79.96/14 0.5} 68. Rc3 {+12.92/7 0.6} Kg1 {-79.97/28 0.2} 69. Kf3 {+12.92/6 0.6} Kh1 {-79.98/28 0.1} 70. Kf2 {+12.92/2 0.6} Kh2 {-79.99/28 0.2} 71. Rh3# {Xboard adjudication: Checkmate} 1-0 [/pgn]

[Henk]

Last win only month ago. Might be because of playing more games during holidays. Or a trend break.
[pgn]
[Event "Computer Chess Game"]
[Site "LAPTOP-1FK7MTIP"]
[Date "2020.01.02"]
[Round "-"]
[White "Skipper"]
[Black "Fairy-Max 4.8V"]
[Result "1-0"]
[TimeControl "180"]
[Annotator "1. +0.02 2... +0.10"]

1. Nc3 {+0.02/9} d5 2. e3 {+0.05/9 3} Be6 {+0.10/8 5} 3. Nf3 {+0.25/9 3}
Nc6 {-0.01/9 10} 4. Be2 {+0.13/9 3} h6 {-0.14/8 2.2} 5. Nb5 {+0.14/9 3} Nf6
{-0.24/10 7} 6. O-O {+0.40/8 3} a6 {-0.06/9 6} 7. Nbd4 {+0.40/10 3} Nxd4
{-0.05/12 4} 8. Nxd4 {+0.37/10 3} Bd7 {-0.07/11 7} 9. Nf3 {+0.42/9 3} g6
{-0.02/9 2.0} 10. Bd3 {+0.30/9 3} Bg7 {+0.11/11 3} 11. Qe1 {+0.00/9 3} O-O
{+0.14/10 4} 12. Ne5 {-0.03/9 2.9} Be6 {-0.09/10 3} 13. Nf3 {-0.04/8 2.8}
c5 {-0.05/9 2.2} 14. b3 {-0.18/9 2.8} Ne4 {-0.04/9 3} 15. c3 {-0.20/9 2.7}
Bf6 {+0.03/9 1.8} 16. Bb2 {-0.06/8 2.7} Qb6 {-0.04/8 5} 17. Rd1
{-0.01/8 2.6} c4 {+0.10/10 4} 18. Bc2 {-0.21/8 2.6} Nc5 {+0.12/10 8} 19.
Nd4 {-0.02/8 2.5} Nd3 {+0.35/9 1.4} 20. Bxd3 {+0.13/9 2.5} cxd3
{+0.44/11 1.9} 21. Nxe6 {+0.12/9 2.4} fxe6 {+0.48/11 6} 22. e4
{+0.36/8 2.4} Qa5 {+0.58/9 3} 23. exd5 {+0.44/9 2.3} Qxd5 {+0.33/10 2.1}
24. c4 {+0.42/10 2.3} Qf5 {+0.39/11 1.2} 25. Bxf6 {+0.40/10 2.2} Rxf6
{+0.51/11 2.2} 26. Qe3 {+0.72/9 2.2} g5 {+0.51/10 1.1} 27. Qb6
{+0.73/9 2.1} Rb8 {-0.16/10 2.4} 28. Qc7 {+1.15/9 2.1} Rff8 {-0.24/11 1.3}
29. Qxe7 {+1.15/8 2.1} Rfe8 {-0.25/11 1.3} 30. Qb4 {+1.15/8 2.0} Qe5
{-0.26/11 4} 31. Rc1 {+1.03/8 2.0} Qd4 {-0.26/11 1.7} 32. Rb1 {+1.23/8 1.9}
b5 {-0.17/10 2.0} 33. Rbd1 {+1.13/8 1.9} bxc4 {-0.10/10 1.1} 34. Qa4
{+1.20/8 1.9} Ra8 {-0.16/10 3} 35. bxc4 {+1.19/8 1.8} Rec8 {-0.16/10 0.9}
36. Rc1 {+1.01/8 1.8} e5 {-0.17/10 1.2} 37. a3 {+1.23/7 1.7} g4
{-0.10/9 1.0} 38. Rc3 {+1.08/8 1.7} Rc5 {-0.22/10 3} 39. Qb3 {+1.26/8 1.7}
Rd8 {-0.25/10 1.3} 40. Qb6 {+1.01/8 1.6} Rd6 {-0.24/10 1.0} 41. Qb7
{+1.26/8 1.6} Rdc6 {-0.24/9 1.0} 42. Qa8+ {+1.48/8 1.6} Rc8 {-0.84/9 3} 43.
Qxa6 {+1.73/8 1.6} R8c6 {-0.84/10 1.8} 44. Qa7 {+2.00/8 1.5} Rc8
{-0.85/10 1.4} 45. Qe7 {+2.11/8 1.5} Rxc4 {-1.01/10 1.1} 46. Qe6+
{+2.45/8 1.5} Kg7 {-1.47/9 2.2} 47. Rb1 {+6.72/6 1.4} Rxc3 {-1.54/9 2.1}
48. dxc3 {+1.41/6 1.4} Qxc3 {-1.26/9 0.8} 49. Rb7+ {+2.25/7 1.4} Rc7
{-1.25/10 1.2} 50. Qxg4+ {+7.29/7 1.4} Kh7 {-1.26/10 0.6} 51. Qf5+
{+1.41/8 1.3} Kg7 {-1.27/11 0.6} 52. Rxc7+ {+1.41/9 1.3} Qxc7
{-1.14/12 0.7} 53. Qxd3 {+1.44/8 1.3} Qc1+ {-1.16/12 1.2} 54. Qf1
{+1.41/9 1.2} Qxa3 {-1.16/12 1.4} 55. Qb1 {+1.41/8 1.2} Qa8 {-0.94/10 0.8}
56. Qb2 {+1.46/8 1.2} Qe4 {-0.93/11 0.5} 57. Kf1 {+1.40/8 1.2} Qd3+
{-0.74/12 0.9} 58. Ke1 {+1.46/9 1.1} Qe4+ {-0.72/11 0.6} 59. Qe2
{+1.41/9 1.1} Qb1+ {-0.73/11 1.0} 60. Qd1 {+1.41/9 1.1} Qb4+ {-0.62/9 0.5}
61. Qd2 {+1.41/8 1.1} Qb1+ {-0.56/10 0.5} 62. Ke2 {+1.41/8 1.1} Qe4+
{-0.59/11 0.9} 63. Qe3 {+1.42/8 1.0} Qc2+ {-0.48/12 1.0} 64. Ke1
{+1.42/9 1.0} Qb1+ {-0.36/11 0.6} 65. Kd2 {+1.42/8 1.0} Qa2+ {-0.36/11 1.8}
66. Kd3 {+1.42/8 1.0} Qa6+ {-0.33/11 5} 67. Ke4 {+1.44/8 1.0} Qg6+
{-0.32/10 0.4} 68. Kxe5 {+1.50/8 0.9} Qf6+ {-0.61/10 1.7} 69. Ke4
{+1.50/8 0.9} Qg6+ {-0.78/10 1.1} 70. Kf3 {+2.39/8 0.9} Qh5+ {-0.92/10 1.5}
71. Kg3 {+1.50/8 0.9} Qg6+ {-1.09/12 0.5} 72. Kh4 {+1.52/8 0.9} Qxg2
{-1.39/12 0.9} 73. Qg3+ {+1.50/9 0.9} Qxg3+ {-2.15/16 0.3} 74. hxg3
{+1.55/10 0.8} Kg6 {-2.00/17 0.3} 75. g4 {+1.57/11 0.8} Kf6 {-3.36/19 0.3}
76. Kh5 {+1.58/10 0.8} Kg7 {-8.36/20 0.7} 77. f3 {+2.53/12 0.8} Kh7
{-8.36/20 0.3} 78. f4 {+2.57/13 0.8} Kg7 {-9.58/22 0.4} 79. f5
{+2.57/11 0.8} Kf7 {-9.67/21 0.3} 80. Kxh6 {+2.74/11 0.7} Kf6
{-10.25/21 0.5} 81. g5+ {+11.72/10 0.7} Kxf5 {-9.10/19 0.4} 82. g6
{+11.74/11 0.7} Kf6 {-9.23/18 0.3} 83. g7 {+11.74/12 0.7} Kf7
{-9.75/18 0.4} 84. Kh7 {+11.75/11 0.7} Ke6 {-79.92/17 0.3} 85. g8=Q+
{+11.75/10 0.7} Ke5 {-79.93/16 0.2} 86. Kg6 {+11.76/9 0.7} Kd4
{-9.78/14 0.4} 87. Kf5 {+11.76/9 0.6} Kd3 {-10.06/13 0.3} 88. Ke5
{+11.76/9 0.6} Kc3 {-79.91/13 0.2} 89. Kd5 {+11.76/8 0.6} Kd3
{-79.94/13 0.2} 90. Qg1 {+11.77/9 0.6} Kd2 {-79.95/14 0.2} 91. Qf2+
{+11.77/8 0.6} Kd3 {-79.95/14 0.3} 92. Qe1 {+11.77/8 0.6} Kc2
{-79.96/20 0.2} 93. Kc4 {+11.78/7 0.6} Kb2 {-79.97/28 0.1} 94. Qd1
{+11.79/5 0.6} Ka2 {-79.98/28 0.1} 95. Kc3 {+11.82/3 0.5} Ka3
{-79.99/28 0.1} 96. Qa1#
{Xboard adjudication: Checkmate} 1-0
[/pgn]

[Henk]

Another win. Maybe two months only hold for one minute games.
[pgn]
[Event "Computer Chess Game"]
[Site "LAPTOP-1FK7MTIP"]
[Date "2020.01.10"]
[Round "-"]
[White "Skipper"]
[Black "Fairy-Max 4.8V"]
[Result "1-0"]
[TimeControl "120"]
[Annotator "1. +0.11 3... -0.03"]

1. e4 {+0.11/8} c5 2. Nf3 {+0.09/8 2.4} d6 3. Bd3 {+0.40/8 2.3} h5
{-0.03/8 2.2} 4. O-O {+0.63/8 2.3} Nc6 {+0.13/9 2.0} 5. Re1 {+0.59/8 2.2}
Nf6 {+0.09/9 4} 6. Bf1 {+0.77/8 2.2} Bg4 {-0.10/8 4} 7. h3 {+0.77/8 2.1}
Bd7 {-0.25/8 1.4} 8. c3 {+0.71/8 2.1} Qc7 {-0.10/8 2.1} 9. d4 {+0.80/7 2.1}
O-O-O {+0.15/9 2.3} 10. Ng5 {+0.97/8 2.0} Be8 {-0.19/9 1.4} 11. d5
{+1.01/8 2.0} Ne5 {-0.23/10 2.8} 12. f4 {+1.02/8 1.9} Ned7 {-0.33/10 2.8}
13. Nd2 {+1.15/7 1.9} Rh6 {-0.16/9 1.9} 14. Ndf3 {+1.12/7 1.9} Nh7
{-0.14/10 2.1} 15. Qa4 {+1.11/8 1.8} Qb6 {+0.05/9 1.4} 16. Nxh7
{+1.10/8 1.8} Rxh7 {-0.08/10 2.6} 17. Qb3 {+1.12/7 1.7} g6 {-0.09/10 2.1}
18. Be3 {+1.32/8 1.7} Bg7 {+0.00/9 1.5} 19. Ng5 {+1.39/8 1.7} Rh8
{-0.04/11 2.1} 20. Rad1 {+1.44/8 1.6} Bf6 {-0.03/11 3} 21. h4 {+1.49/7 1.6}
Qa5 {-0.10/10 2.4} 22. Nf3 {+1.53/7 1.6} Qb6 {-0.10/8 1.2} 23. Bc4
{+1.51/8 1.6} Rh7 {-0.01/10 1.2} 24. Qa3 {+1.57/7 1.5} Rh8 {-0.25/9 2.5}
25. b4 {+1.68/8 1.5} a6 {-0.40/9 1.8} 26. bxc5 {+1.69/7 1.5} Nxc5
{-0.36/9 1.5} 27. e5 {+1.59/7 1.4} Bg7 {-0.48/9 5} 28. Qb4 {+1.58/7 1.4}
Qc7 {-0.01/7 0.8} 29. Bd4 {+1.59/7 1.4} Rg8 {+0.03/6 0.9} 30. Nd2
{+1.48/6 1.3} b5 {+0.04/7 0.9} 31. Bf1 {+1.42/7 1.3} Bd7 {+0.01/7 1.3} 32.
Nf3 {+1.74/6 1.3} Rde8 {-0.09/7 2.5} 33. Qa3 {+1.54/7 1.3} Ref8
{-0.17/7 0.7} 34. Nd2 {+1.63/7 1.2} Bg4 {-0.06/8 1.8} 35. Ra1 {+1.96/6 1.2}
Kd7 {-0.18/7 1.5} 36. Nb3 {+2.02/5 1.2} Nxb3 {-0.19/8 1.6} 37. axb3
{+1.96/7 1.2} dxe5 {-0.64/9 1.7} 38. fxe5 {+2.64/6 1.2} Ra8 {-1.40/9 1.4}
39. Qb4 {+2.66/6 1.1} Kd8 {-1.48/9 1.4} 40. Bxb5 {+2.59/7 1.1} a5
{-1.43/9 1.6} 41. Qc5 {+2.58/7 1.1} Bh6 {-1.40/9 0.8} 42. Bc6 {+2.95/7 1.1}
Rc8 {-2.19/9 1.4} 43. Rxa5 {+3.35/6 1.0} Bd2 {-3.71/9 0.8} 44. e6
{+3.43/6 1.0} Bxe1 {-1.88/9 1.1} 45. Ra7 {+2.30/7 1.0} Bg3 {-2.96/9 0.9}
46. Rxc7 {+3.19/7 1.0} Rxc7 {-7.24/10 0.9} 47. Qa5 {+4.23/7 1.0} Bf4
{-5.46/8 0.5} 48. Qa8+ {+16.05/7 0.9} Rc8 {-6.91/10 0.6} 49. Bb6+
{+16.08/5 0.9} Bc7 {-5.31/10 0.6} 50. Bxc7+ {+8.02/8 0.9} Kxc7
{-6.50/10 0.9} 51. Qa5+ {+4.24/8 0.9} Kd6 {-7.60/10 0.6} 52. Qb4+
{+4.28/7 0.9} Ke5 {-13.75/11 0.7} 53. Qd4+ {+8.03/8 0.9} Kf5
{-14.44/11 0.6} 54. exf7 {+8.03/7 0.8} g5 {-6.97/9 0.6} 55. Bd7+
{+9.28/7 0.8} Kg6 {-7.61/10 1.2} 56. fxg8=Q+ {+10.06/7 0.8} Rxg8
{-7.65/13 0.4} 57. Bxg4 {+10.25/8 0.8} hxg4 {-7.66/12 3} 58. Qxg4
{+10.27/8 0.8} Ra8 {-7.28/9 0.4} 59. hxg5 {+10.40/8 0.8} Ra1+
{-7.32/11 0.6} 60. Kf2 {+10.32/8 0.7} Ra2+ {-7.70/10 0.7} 61. Ke3
{+10.28/8 0.7} Ra6 {-7.66/9 0.4} 62. Qe4+ {+10.26/8 0.7} Kxg5
{-8.28/10 0.9} 63. Qxe7+ {+10.28/8 0.7} Kg6 {-10.58/10 0.8} 64. g3
{+10.28/9 0.7} Ra1 {-8.25/10 0.7} 65. Kd2 {+10.27/7 0.7} Ra2+
{-8.35/10 0.4} 66. Kc1 {+10.28/11 0.7} Ra1+ {-8.26/11 0.4} 67. Kb2
{+10.28/9 0.6} Rf1 {-10.58/11 0.7} 68. Ka2 {+10.27/8 0.6} Rf2+
{-8.33/11 0.3} 69. Kb1 {+10.27/11 0.6} Rf1+ {-8.32/12 0.4} 70. Kc2
{+10.27/10 0.6} Rf2+ {-8.31/11 0.3} 71. Kc1 {+10.27/11 0.6} Rf1+
{-8.32/12 0.3} 72. Kd2 {+10.27/9 0.6} Rf2+ {-7.77/10 0.5} 73. Kd1
{+10.27/10 0.6} Rf1+ {-8.37/11 0.5} 74. Ke2 {+10.27/9 0.6} Rf7
{-10.65/11 0.4} 75. Qa3 {+10.27/9 0.6} Kf5 {-7.74/10 0.8} 76. Kd1
{+10.27/9 0.5} Kg4 {-7.72/10 0.4} 77. Qd6 {+9.35/7 0.5} Rf2 {-7.77/10 0.7}
78. Qg6+ {+10.27/8 0.5} Kh3 {-8.49/10 0.3} 79. g4 {+10.27/9 0.5} Rf1+
{-7.76/10 0.3} 80. Kc2 {+10.27/10 0.5} Rf2+ {-7.71/12 0.3} 81. Kb1
{+10.27/11 0.5} Rf1+ {-7.81/12 1.0} 82. Ka2 {+10.27/9 0.5} Rd1
{-7.82/10 0.3} 83. c4 {+10.27/9 0.5} Rd2+ {-7.87/10 0.9} 84. Ka1
{+10.27/10 0.5} Rd4 {-7.87/10 0.4} 85. g5 {+10.27/9 0.5} Kg4 {-7.86/9 0.2}
86. Kb1 {+10.27/9 0.4} Rd1+ {-7.80/10 0.7} 87. Ka2 {+10.27/10 0.4} Rd2+
{-7.80/9 0.2} 88. Ka3 {+10.27/9 0.4} Rd4 {-8.33/8 0.2} 89. Kb2
{+10.27/8 0.4} Rd2+ {-8.32/10 0.2} 90. Kc1 {+10.27/10 0.4} Rf2
{-8.40/10 0.5} 91. Qd3 {+10.27/8 0.4} Rh2 {-8.47/10 0.3} 92. Qe3
{+10.27/8 0.4} Rh1+ {-10.67/12 1.4} 93. Kb2 {+10.27/9 0.4} Rh3
{-10.72/11 0.9} 94. Qxh3+ {+15.20/8 0.4} Kxh3 {-18.09/14 0.3} 95. g6
{+15.15/8 0.4} Kh2 {-18.07/13 0.1} 96. g7 {+15.16/9 0.4} Kg1
{-18.39/12 0.1} 97. g8=Q+ {+25.40/8 0.4} Kf2 {-79.95/11 0.1} 98. d6
{+25.43/8 0.4} Kf1 {-79.96/13 0.1} 99. d7 {+25.43/8 0.3} Ke1
{-79.97/17 0.1} 100. d8=Q {+25.44/6 0.3} Kf2 {-79.98/28 0.1} 101. Qd2+
{+25.42/2 0.3} Kf3 {-79.99/28 0.1} 102. Qgg2#
{Xboard adjudication: Checkmate} 1-0
[/pgn]

[jdart]

Some thoughts:

IMO most of the difference between very low-rated and higher-rated engines are due to bugs. Bugs can include common programming errors like array overrun, and also logic errors. It is really essential to have code that you know does what you intended it to do. The cure for this is testing and verification. I use tools like valgrind to find memory issues, have unit tests for key functions, and use "perft" to verify search correctness.

The second issue is probably eval. In particular, programs without effective king safety will get beaten by programs that do have it. Badly tuned king safety can lead to issues like unsound sacs. Auto-tuning eval is worth quite a few rating points.

Pruning and reduction strategies are also worth many rating points but need to be tuned. Many of these features individually are not big rating boosters though. Null move is a big winner. Using history tables for pruning and reduction decisions is worth quite a lot, too.

--Jon

[supersharp77]

First time in about two months Skipper won a game from Fairy-Max.

I'd say Skipper is ready for the CSVN tournament! 7/8 December in Gouda. Check out the details at www.csvn.nl

Right.....we have been hearing about "Skipper Engine" for years...is there a actual chess engine available for testing? (exe)...Thx AR...

[tmokonen]

Right.....we have been hearing about "Skipper Engine" for years...is there a actual chess engine available for testing? (exe)...Thx AR...

It's just a bunch of tiresome trolling bullshit on the part of that weirdo Henk.

[Ovyron]

I actually believed something was happening.

[flok]

Right.....we have been hearing about "Skipper Engine" for years...is there a actual chess engine available for testing? (exe)...Thx AR...

It's just a bunch of tiresome trolling bullshit on the part of that weirdo Henk.

That's not very nice.