Can't beat fairy-max

[Henk]

[pgn] [Event "Computer Chess Game"] [Site "HP"] [Date "2019.03.02"] [Round "-"] [White "Fairy-Max 4.8S"] [Black "SchaakMachine"] [Result "1/2-1/2"] [TimeControl "300"] [Annotator "1. +0.13 1... -0.10"] 1. d3 {+0.13/8} Nc6 {-0.10/11 6} 2. c4 {+0.25/9 6} Nf6 {+0.02/12 6} 3. f4 {+0.13/9 6} d5 {+0.04/13 6} 4. cxd5 {+0.04/10 6} Nxd5 {-0.03/13 6} 5. e4 {+0.12/9 4} Nf6 {+0.05/13 6} 6. Nf3 {+0.10/9 7} e6 {-0.03/12 5} 7. Be3 {-0.03/9 10} Bd6 {-0.01/10 5} 8. Bd2 {-0.06/9 7} e5 {+0.33/11 5} 9. Bc3 {-0.07/9 4} Ng4 {+0.46/11 5} 10. Qe2 {-0.04/9 6} exf4 {+1.02/13 5} 11. Bxg7 {-0.23/10 4} Rg8 {+1.06/13 5} 12. Bc3 {-0.30/10 5} Ne3 {+1.06/10 5} 13. Na3 {-0.26/8 3} Bxa3 {+1.60/12 5} 14. bxa3 {-0.46/10 5} Qd6 {+1.52/13 5} 15. Bb2 {-0.43/9 5} Be6 {+1.55/13 5} 16. Qd2 {-0.29/9 9} O-O-O {+1.57/9 4} 17. Qe2 {-0.44/8 5} Qc5 {+2.38/12 4} 18. Rc1 {-0.46/8 2.7} Qa5+ {+2.38/13 4} 19. Rc3 {-0.71/9 9} Bxa2 {+2.39/12 4} 20. g3 {-0.73/9 4} Nxf1 {+2.46/12 4} 21. Qxf1 {-0.91/9 4} fxg3 {+2.60/13 4} 22. hxg3 {-1.58/10 11} Rxg3 {+3.04/13 4} 23. Rh6 {-1.56/9 5} Qb5 {+3.37/12 4} 24. Bc1 {-1.63/9 4} Bb1 {+3.76/12 4} 25. Qf2 {-1.71/9 6} Rg4 {+3.76/12 4} 26. Nd2 {-1.80/9 7} Bxd3 {+3.82/9 4} 27. Qe3 {-1.68/8 1.9} f5 {+4.69/10 4} 28. Rh5 {-1.70/9 3} Rg2 {+5.27/10 3} 29. Rxf5 {-2.47/9 2.8} Qa6 {+5.40/13 3} 30. Qh3 {-2.60/10 6} Re2+ {+4.72/14 3} 31. Kd1 {-2.65/9 3} Qa4+ {+4.49/13 3} 32. Nb3 {-2.34/9 8} Bc2+ {+4.48/13 3} 33. Kxe2 {-2.50/10 1.8} Qxe4+ {+4.30/13 3} 34. Kf2 {-2.42/10 2.3} Qxf5+ {+4.33/12 3} 35. Qxf5+ {-2.21/12 2.7} Bxf5 {+4.14/9 3} 36. Bf4 {-2.21/10 3} Bb1 {+4.53/8 3} 37. Nd2 {-2.46/9 2.1} Ba2 {+4.19/11 2.9} 38. Bg5 {-2.50/10 2.4} Rd4 {+4.25/9 2.9} 39. Rf3 {-2.30/10 1.6} Bd5 {+4.44/10 2.8} 40. Rf8+ {-1.43/11 1.7} Kd7 {+4.28/11 2.8} 41. Rh8 {-1.46/11 3} Ne5 {+3.68/11 2.7} 42. Rxh7+ {-1.38/10 1.7} Kc6 {+3.51/12 2.7} 43. Rh6+ {-1.56/10 4} Kb5 {+3.58/11 2.6} 44. Rh4 {-1.74/10 4} Rxh4 {+3.50/11 2.6} 45. Bxh4 {-1.67/12 1.4} c5 {+2.22/13 2.5} 46. Be7 {-1.54/11 1.3} a5 {+2.31/14 2.5} 47. Ke3 {-1.49/13 2.6} a4 {+2.41/14 2.4} 48. Bd6 {-1.45/15 1.2} Nc4+ {+2.36/15 2.4} 49. Nxc4 {-2.17/17 1.3} Kxc4 {+2.40/17 2.4} 50. Kd2 {-2.30/16 57} b5 {+2.37/17 2.3} 51. Kc1 {-2.20/12 0.6} Bf3 {+2.37/15 2.3} 52. Bg3 {-2.13/12 1.2} Kb3 {+2.47/18 2.2} 53. Kd2 {-2.56/11 0.5} Kxa3 {+3.38/12 2.2} 54. Kd3 {-2.90/10 0.7} Kb3 {+3.49/15 2.1} 55. Bh2 {-3.44/11 0.4} a3 {+3.58/15 2.1} 56. Be5 {-3.97/11 0.4} c4+ {+3.66/18 2.1} 57. Kd2 {-5.04/11 0.4} b4 {+3.66/16 2.0} 58. Ba1 {-9.57/12 0.9} c3+ {+22.42/17 2.0} 59. Kc1 {-11.26/12 0.6} Be2 {+2621.27/17 1.9} 60. Kb1 {-12.99/14 0.4} a2+ {+2621.29/19 1.9} 61. Kc1 {-9.91/15 0.7} Bg4 {+2621.31/18 1.9} 62. Bxc3 {-3.18/14 0.6} Kc4 {+2.41/20 1.8} 63. Be5 {-3.34/13 0.4} Kd5 {+2.41/19 1.8} 64. Bf6 {-3.36/13 0.4} Be2 {+2.41/17 1.8} 65. Kd2 {-3.24/13 0.4} Bf1 {+2.41/18 1.7} 66. Ke3 {-3.38/12 0.3} Bg2 {+2.41/18 1.7} 67. Kf4 {-3.42/13 0.5} Bh1 {+2.41/18 1.7} 68. Ke3 {-3.51/12 0.6} Be4 {+2.41/19 1.6} 69. Bd4 {-3.40/13 0.5} Bc2 {+2.41/19 1.6} 70. Bf6 {-3.43/13 0.4} Bb1 {+2.41/17 1.6} 71. Kf4 {-3.50/12 0.4} Bd3 {+2.41/18 1.5} 72. Kg5 {-3.44/12 0.5} Bf1 {+2.41/18 1.5} 73. Kf4 {-3.43/13 0.3} Be2 {+2.41/19 1.5} 74. Ke3 {-3.42/13 0.3} Bd1 {+2.41/20 1.5} 75. Kd2 {-3.43/13 0.3} Bb3 {+2.41/19 1.4} 76. Kd3 {-3.43/13 0.3} Ba4 {+2.41/18 1.4} 77. Ba1 {-3.45/13 0.4} Bd1 {+2.41/18 1.4} 78. Bb2 {-3.33/13 0.3} Bf3 {+2.41/19 1.4} 79. Kc2 {-3.34/13 0.4} Kc4 {+2.41/18 1.3} 80. Be5 {-3.32/13 0.3} Be4+ {+2.41/17 1.3} 81. Kd2 {-3.38/12 0.2} Kd5 {+2.41/17 1.3} 82. Ba1 {-3.38/13 0.3} Bb1 {+2.41/19 1.3} 83. Bb2 {-3.34/13 0.4} Bf5 {+2.41/18 1.2} 84. Ke3 {-3.29/12 0.3} Bh3 {+2.41/16 1.2} 85. Kd3 {-3.32/12 0.2} Bg4 {+2.41/16 1.2} 86. Ba1 {-3.30/12 0.2} Bf5+ {+2.41/18 1.1} 87. Ke3 {-3.28/12 0.2} Bb1 {+2.41/17 1.1} 88. Bf6 {-3.32/13 0.3} Bc2 {+2.41/18 1.1} 89. Kf3 {-3.40/12 0.3} Bd1+ {+2.41/16 1.1} 90. Kf4 {-3.40/13 0.3} Bb3 {+2.41/17 1.1} 91. Bb2 {-3.42/12 0.3} Bc4 {+2.41/18 1.1} 92. Bf6 {-3.34/11 0.2} Bb5 {+2.41/17 1.0} 93. Bg7 {-3.41/12 0.3} Ba4 {+2.41/17 1.0} 94. Bf6 {-3.41/13 0.3} Bd1 {+2.41/17 1.0} 95. Ke3 {-3.44/12 0.2} Bg4 {+2.41/17 1.0} 96. Kf4 {-3.39/13 0.6} Bh3 {+2.41/16 0.9} 97. Be5 {-3.44/13 0.4} Be6 {+2.41/16 0.9} 98. Bf6 {-3.42/13 0.2} Bd7 {+2.41/15 0.9} 99. Be5 {-3.42/13 0.2} Bh3 {+2.41/15 0.9} 100. Bf6 {-3.46/12 0.2} Be6 {+2.41/15 0.9} 101. Kf3 {-3.41/12 0.2} Bd7 {+2.41/15 0.8} 102. Ke3 {-3.42/13 0.3} Bc6 {+2.41/15 0.9} 103. Bd4 {-3.41/12 0.2} Ba4 {+2.41/16 0.8} 104. Bb2 {-3.45/12 0.2} Bb5 {+2.41/17 0.8} 105. Bf6 {-3.38/12 0.2} Ba6 {+2.41/16 0.8} 106. Bd4 {-3.45/11 0.1} Bb7 {+2.41/16 0.8} 107. Kd3 {-3.44/12 0.4} Ba8 {+2.41/15 0.8} 108. Ba1 {-3.41/12 0.1} Bc6 {+2.41/15 0.7} 109. Kc2 {-3.30/12 0.3} Kc5 {+2.40/17 0.7} 110. Kb3 {-3.23/11 0.1} Bd5+ {+2.40/18 0.7} 111. Ka4 {-3.18/12 0.1} Kc4 {+2.40/19 0.7} 112. Bf6 {-3.17/11 0.3} {Xboard adjudication: 50-move rule} 1/2-1/2 [/pgn]

[Sven]

Mostly endgame problems in this game:
61...Bg4? changes from forced win to draw (many other moves were winning)
72.Kg5? blunders away the draw but 72...Bf1? misses the forced win again (better Kc4 or Ke4)

Does SchaakMachine handle unlike bishops in its endgame evaluation?

[Henk]

No nothing. It only counts passed pawns, weak pawns, space and king position.
[Only checks if weak pawn is blocked by bishop]

[hgm]

Of course Fairy-Max does not even do any of that. It just has piece values a common centralization bonus for P, N, B and K (a parabolic potential), a pawn-push bonus, plus hefty extra bonus for 6th and 7th-rank Pawns. Nothing of that exceeds what you could do with piece-square tables. (In the middle-game it also has a penalty on King moves, and on moving a 2nd-rank Pawn in front of a King, but that is switched off in the end-game.)

[Sven]

No nothing. It only counts passed pawns, weak pawns, space and king position.
[Only checks if weak pawn is blocked by bishop]

Then only fast and deep search can avoid running into that problem in unlike bishop endgames.

[Henk]

[pgn] [Event "Computer Chess Game"] [Site "HP"] [Date "2019.03.04"] [Round "-"] [White "SchaakMachine"] [Black "Fairy-Max 4.8S"] [Result "1/2-1/2"] [TimeControl "300"] [Annotator "1. +0.22 1... +0.26"] 1. Nf3 {+0.22/8} Nf6 {+0.26/9 12} 2. d4 {+0.33/8 6} Nc6 {+0.10/8 5} 3. d5 {+0.67/8 6} Nb4 {-0.05/9 6} 4. c4 {+0.89/7 6} c5 {+0.06/9 5} 5. Nc3 {+0.94/7 6} d6 {+0.06/9 3} 6. e4 {+1.28/7 5} Bd7 {-0.15/8 7} 7. Be2 {+1.65/7 5} Qa5 {-0.19/9 5} 8. O-O {+1.75/7 5} O-O-O {+0.08/9 6} 9. a3 {+1.75/6 5} e5 {-0.19/9 11} 10. dxe6 {+1.79/8 5} Bxe6 {-0.47/10 4} 11. Bg5 {+1.78/8 5} Nc6 {-0.41/11 5} 12. Nd5 {+1.77/8 5} Bxd5 {-0.40/10 3} 13. cxd5 {+1.82/8 5} Ne7 {-0.37/10 3} 14. Bd3 {+2.25/6 5} h6 {-0.33/10 4} 15. b4 {+2.20/8 5} Qc7 {-0.41/10 4} 16. Bxf6 {+2.17/8 4} gxf6 {-0.05/9 4} 17. Qb3 {+2.14/6 4} Ng6 {+0.06/9 4} 18. Rfc1 {+1.89/7 4} Nf4 {+0.13/9 3} 19. Nd4 {+1.96/7 4} Nxd3 {+0.33/9 2.6} 20. Qxd3 {+2.12/7 4} Rd7 {+0.33/9 4} 21. Qg3 {+2.36/7 4} Qd8 {+0.33/9 3} 22. Rc4 {+2.33/6 4} b6 {+0.36/9 9} 23. Nc6 {+2.57/8 4} Qe8 {-0.43/10 2.6} 24. bxc5 {+3.01/8 4} b5 {-0.62/10 4} 25. Rd4 {+3.66/7 4} h5 {-0.44/9 6} 26. cxd6 {+3.55/8 4} Bxd6 {-0.83/10 4} 27. Qc3 {+3.56/7 4} a6 {-1.27/9 3} 28. Rb1 {+3.55/7 3} Rc7 {-0.83/8 4} 29. Qh3+ {+3.49/7 3} Qd7 {-0.46/8 2.5} 30. Qxd7+ {+3.28/8 3} Rxd7 {-0.55/11 2.8} 31. Rb3 {+3.51/8 3} Re8 {-0.49/9 2.4} 32. Rc3 {+2.73/8 3} Rc7 {-0.50/10 4} 33. f4 {+3.22/8 3} h4 {-0.42/9 2.3} 34. g3 {+3.39/7 3} h3 {-0.14/11 7} 35. a4 {+3.55/9 3} Kb7 {+0.06/10 7} 36. axb5 {+3.65/8 3} axb5 {+0.33/11 4} 37. Kf2 {+3.00/8 2.9} Kb6 {+0.26/10 2.0} 38. Kf3 {+3.23/8 2.9} Ra8 {+0.26/11 5} 39. Kg4 {+3.04/8 2.8} Rh8 {+0.09/11 3} 40. Kf5 {+3.55/8 2.8} Rh5+ {+0.02/11 5} 41. Kxf6 {+3.61/9 2.7} Rh6+ {-0.20/11 2.7} 42. Kf5 {+3.90/9 2.7} Rh5+ {-0.21/10 1.7} 43. Kg4 {+3.98/8 2.6} Rh6 {-0.55/10 2.9} 44. Rd1 {+4.00/7 2.6} f6 {-0.94/9 2.1} 45. Kf5 {+4.19/7 2.5} Rh5+ {-0.70/9 2.2} 46. Kxf6 {+5.43/7 2.5} Bf8 {-1.08/10 5} 47. e5 {+5.38/8 2.5} Bg7+ {-1.18/10 4} 48. Ke6 {+5.59/7 2.4} Rh6+ {-1.47/10 2.8} 49. Kf5 {+5.55/7 2.3} Rd7 {-1.69/10 2.6} 50. Rd4 {+5.58/7 2.3} Rh8 {-1.69/10 2.2} 51. Rc1 {+5.57/7 2.2} Rc7 {-1.60/9 1.8} 52. Ra1 {+5.59/7 2.2} Rh5+ {-1.59/9 2.8} 53. Ke4 {+5.58/8 2.2} Bf8 {-1.87/10 2.5} 54. Rb1 {+5.55/7 2.1} Bc5 {-2.30/10 2.4} 55. Rc4 {+5.72/7 2.1} Rhh7 {-2.28/9 1.5} 56. Nd4 {+5.90/9 2.0} Bxd4 {-2.31/11 1.0} 57. Rxd4 {+6.00/8 2.0} Rc2 {-2.80/12 1.8} 58. Rdb4 {+6.04/8 2.0} Rxh2 {-2.29/12 1.4} 59. Rxb5+ {+6.07/9 1.9} Ka6 {-2.26/12 1.6} 60. g4 {+6.01/8 1.9} Ra2 {-1.54/10 1.1} 61. R5b4 {+6.04/7 1.9} h2 {-1.46/13 1.4} 62. Rh1 {+6.01/7 1.8} Re2+ {-1.51/13 2.8} 63. Kd3 {+6.01/9 1.8} Ra2 {-2.01/12 0.8} 64. Kc3 {+6.01/7 1.7} Rh3+ {-1.44/12 1.2} 65. Kc4 {+6.01/7 1.7} Rf3 {-1.36/12 1.3} 66. f5 {+5.14/8 1.7} Rg3 {-1.37/11 0.8} 67. Kc5 {+5.12/9 1.6} Rg1 {-1.44/12 1.5} 68. Rb1 {+5.04/9 1.6} Rxg4 {-1.43/12 1.3} 69. Ra1 {+4.54/9 1.6} Rxa1 {-2.03/15 1.2} 70. Rxa1+ {+5.02/11 1.5} Kb7 {-2.57/14 6} 71. Rb1+ {+5.03/9 1.5} Ka6 {-2.02/11 0.9} 72. Rh1 {+5.02/9 1.5} Rf4 {-2.83/11 0.8} 73. Rxh2 {+6.00/11 1.5} Rxf5 {-3.35/12 1.4} 74. Ra2+ {+6.15/11 1.4} Kb7 {-3.24/12 0.7} 75. Rb2+ {+6.15/10 1.4} Kc7 {-3.23/12 0.9} 76. Re2 {+5.91/8 1.4} Kd7 {-3.33/12 0.6} 77. Re1 {+5.83/8 1.3} Ke8 {-3.34/12 0.8} 78. Re4 {+5.83/9 1.3} Rf2 {-2.63/11 0.6} 79. d6 {+5.83/8 1.3} Rc2+ {-3.30/12 0.5} 80. Rc4 {+5.83/9 1.3} Re2 {-3.28/12 0.6} 81. Kd4 {+5.89/8 1.3} Rd2+ {-2.12/12 0.6} 82. Kc3 {+5.75/9 1.2} Rd5 {-2.15/13 0.9} 83. Rc8+ {+5.73/10 1.2} Kf7 {-2.14/12 0.6} 84. Rc7+ {+5.73/8 1.2} Ke8 {-2.20/13 0.5} 85. Re7+ {+6.29/9 1.1} Kd8 {-2.70/14 1.3} 86. Kb2 {+6.23/8 1.1} Rd3 {-2.62/13 0.5} 87. Ka1 {+6.11/9 1.1} Rd1+ {-2.36/16 0.9} 88. Ka2 {+6.05/9 1.1} Rd3 {-2.35/15 0.8} 89. Kb1 {+6.03/9 1.1} Rd2 {-2.33/15 0.8} 90. Kc1 {+6.05/9 1.0} Rd5 {-2.62/15 0.5} 91. Kc2 {+5.09/9 1.0} Rd4 {-2.64/15 1.2} 92. Re6 {+5.09/8 1.0} Kd7 {-2.07/12 0.5} 93. Rf6 {+5.14/8 1.0} Rd5 {-2.16/12 0.7} 94. Rf7+ {+2.93/8 1.0} Kc6 {-2.17/12 0.6} 95. Rc7+ {+5.79/9 0.9} Kb6 {-2.18/13 0.6} 96. Re7 {+5.73/8 0.9} Kc6 {-2.17/12 0.4} 97. Kb1 {+5.37/9 0.9} Rd2 {-2.17/12 0.7} 98. Re6 {+5.06/8 0.9} Kd7 {-2.14/12 0.5} 99. Rf6 {+5.14/8 0.9} Re2 {-2.15/13 0.6} 100. Rf7+ {+3.19/9 0.9} Kd8 {-2.22/13 0.4} 101. Rf5 {+3.13/9 0.9} Kd7 {-2.18/13 0.7} 102. Kc1 {+5.20/7 0.8} Kc6 {-2.20/12 0.4} 103. Kd1 {+5.09/8 0.8} Ra2 {-2.17/11 0.4} 104. Rf3 {+4.99/7 0.8} Ra7 {-2.16/10 0.4} 105. Kc1 {+3.15/7 0.8} Kd5 {-2.14/10 0.3} 106. Rd3+ {+3.09/8 0.8} Ke6 {-2.19/11 0.4} 107. Kb2 {+3.07/8 0.7} Ra8 {-2.16/11 0.3} 108. Kb3 {+3.04/7 0.7} Kxe5 {-1.41/11 0.4} 109. Kc4 {+2.54/8 0.7} Ke6 {-0.14/12 0.4} 110. Kb5 {+2.65/8 0.7} Rd8 {-0.12/13 0.3} 111. Kc5 {+0.24/9 0.7} Rc8+ {-0.08/14 0.4} 112. Kb6 {+0.05/9 0.7} Kd7 {-0.14/14 0.6} 113. Kb5 {+0.05/8 0.7} Rc6 {-0.08/14 0.6} 114. Rf3 {+0.16/9 0.7} Rxd6 {-0.04/13 0.4} 115. Kc5 {+0.13/9 0.7} Ke7 {+0.01/13 0.4} 116. Rh3 {+0.08/8 0.6} Rd2 {+0.00/13 0.3} 117. Rc3 {+0.08/8 0.6} Ke6 {+0.04/13 0.4} {Xboard adjudication: Trivial draw} 1/2-1/2 [/pgn]

[hgm]

So why does it throw away the Pawns in KRPPKR? It should be trivial to prevent that: just keep the back-most Pawn protected by the Rook. I suppose the Pawn value is positive...

[Henk]

I fixed some evaluation errors but still :

[pgn] [Event "Computer Chess Game"] [Site "HP"] [Date "2019.03.06"] [Round "-"] [White "SchaakMachine"] [Black "Fairy-Max 4.8S"] [Result "0-1"] [TimeControl "300"] [Annotator "1. +0.39 1... +0.06"] 1. e4 {+0.39/9} c5 {+0.06/8 6} 2. Nc3 {+0.52/8 6} Nf6 {+0.15/9 7} 3. e5 {+0.69/8 6} Ng8 {-0.02/9 4} 4. Nf3 {+0.99/8 6} Nc6 {+0.15/9 4} 5. Bb5 {+0.93/9 6} Qc7 {+0.14/9 9} 6. Bxc6 {+0.95/7 5} dxc6 {+0.36/10 8} 7. O-O {+0.86/9 5} Bg4 {+0.53/10 9} 8. Re1 {+0.73/8 5} O-O-O {+0.44/9 6} 9. d3 {+0.76/8 5} h5 {+0.29/9 12} 10. Ne4 {+0.79/7 5} Qb6 {+0.25/8 4} 11. a4 {+1.22/6 5} Qb4 {+0.27/7 5} 12. c3 {+1.32/8 5} Qa5 {+0.24/9 6} 13. h3 {+1.18/7 5} Bf5 {+0.30/9 4} 14. c4 {+1.09/7 5} e6 {+0.25/8 5} 15. Qc2 {+0.96/7 5} Bg6 {+0.16/8 5} 16. Bd2 {+1.10/7 4} Qa6 {+0.25/10 8} 17. Be3 {+1.16/7 4} b6 {+0.28/9 3} 18. a5 {+1.46/6 4} f5 {+0.25/9 4} 19. axb6 {+1.92/6 4} Qxb6 {-0.77/11 4} 20. Neg5 {+1.84/8 4} f4 {-0.44/10 10} 21. Bxf4 {+1.98/7 4} Kd7 {-0.57/9 6} 22. h4 {+3.45/7 4} Nh6 {-0.30/9 5} 23. b3 {+3.27/7 4} Be7 {-0.30/9 6} 24. Bd2 {+3.33/6 4} Ra8 {-0.33/9 4} 25. Ba5 {+3.28/7 4} Qb7 {-0.37/9 2.2} 26. Ne4 {+3.26/7 4} Nf5 {-0.36/9 2.1} 27. Bc3 {+3.12/7 4} Qb6 {-0.35/9 5} 28. Ra5 {+2.95/6 3} Nd4 {-0.34/10 29} 29. Qa2 {+2.48/6 3} Bxe4 {-0.19/9 2.7} 30. Rxe4 {+2.32/6 3} Nxb3 {-0.10/11 2.2} 31. Ra6 {+2.92/8 3} Nc1 {-0.70/10 2.5} 32. Qa3 {+2.92/8 3} Qb7 {-1.94/11 3} 33. Re1 {+3.34/7 3} Nxd3 {-1.98/11 3} 34. Rd1 {+4.13/7 3} Rhc8 {-2.12/10 4} 35. Rxd3+ {+4.67/6 3} Ke8 {-2.30/9 1.6} 36. Rd1 {+4.70/7 3} g6 {-2.53/10 2.2} 37. Ng5 {+5.13/7 3} Rd8 {-2.71/11 3} 38. Rxd8+ {+4.99/5 2.9} Rxd8 {-2.57/10 3} 39. Nxe6 {+4.99/7 2.9} Qb1+ {-2.43/9 1.7} 40. Kh2 {+5.41/5 2.8} Rd1 {-2.46/9 1.5} 41. g4 {+4.36/5 2.7} Rh1+ {+1.96/9 2.5} 42. Kg3 {-0.85/5 2.7} Qg1+ {+1.96/9 4} 43. Kf3 {-0.53/6 2.6} Qxg4+ {+1.78/9 3} 44. Ke3 {-0.61/6 2.6} Rh3+ {+2.01/9 1.7} 45. Kd2 {-1.45/6 2.5} Qxe6 {+1.92/9 2.1} 46. Qb3 {-0.93/6 2.5} Qf5 {+2.87/9 1.5} 47. Qb8+ {-4.58/5 2.4} Bd8 {+6.87/9 1.2} 48. Ke1 {-5.43/6 2.4} Qe4+ {+79.95/13 1.1} 49. Kd1 {-10.72/5 2.3} Qd3+ {+79.96/24 0.9} 50. Kc1 {-2621.36/9 2.3} Qxc3+ {+79.97/28 0.2} 51. Kd1 {-2621.38/11 2.3} Rh1+ {+79.98/28 0.2} 52. Ke2 {-2621.40/14 2.2} Re1# {+79.99/28 0.2} {Xboard adjudication: Checkmate} 0-1 [/pgn]

[Henk]

Something wrong with king safety.

[pgn] [Event "Computer Chess Game"] [Site "HP"] [Date "2019.03.10"] [Round "-"] [White "SchaakMachine"] [Black "Fairy-Max 4.8S"] [Result "0-1"] [TimeControl "300"] [Annotator "1. +0.30 1... +0.21"] 1. c4 {+0.30/15} c6 {+0.21/9 12} 2. Nf3 {+0.26/13 6} Nf6 {+0.28/9 7} 3. d4 {+0.37/15 6} Rg8 {+0.09/8 5} 4. Nc3 {+0.66/15 6} d5 {+0.16/9 5} 5. cxd5 {+0.54/13 6} Nxd5 {-0.09/9 4} 6. e4 {+1.13/16 5} Nxc3 {-0.21/10 10} 7. bxc3 {+1.23/16 5} Qa5 {-0.12/9 7} 8. Qc2 {+1.10/13 5} g5 {-0.09/8 5} 9. Bd3 {+1.44/13 5} Be6 {-0.06/9 6} 10. O-O {+1.72/15 5} h6 {+0.04/9 11} 11. Rb1 {+1.62/14 5} b6 {-0.02/9 5} 12. a4 {+1.87/15 5} Bg7 {-0.07/9 3} 13. Nd2 {+1.94/15 5} g4 {-0.11/9 3} 14. Nc4 {+2.00/14 5} Qh5 {-0.02/10 4} 15. Ne3 {+1.96/13 5} Rh8 {-0.05/9 10} 16. Nf5 {+2.24/17 4} Bf8 {-0.20/10 3} 17. f3 {+2.18/14 4} Nd7 {+0.01/9 4} 18. fxg4 {+2.13/14 4} Qxg4 {-0.26/9 3} 19. Bf4 {+2.07/12 4} Rd8 {+0.00/8 5} 20. Bc7 {+2.44/13 4} Rc8 {-0.04/9 2.8} 21. Bg3 {+2.34/14 4} Rd8 {-0.10/9 9} 22. a5 {+2.50/14 4} bxa5 {-0.25/9 4} 23. Bc7 {+2.48/15 4} Rc8 {-0.06/9 2.7} 24. Bxa5 {+2.51/16 4} Rg8 {-0.25/9 3} 25. Ba6 {+2.59/14 4} Rb8 {-1.02/10 4} 26. Bb7 {+3.08/14 4} Nb6 {-1.00/9 2.2} 27. Bxc6+ {+3.57/14 4} Bd7 {-0.88/9 4} 28. Bxd7+ {+3.77/9 3} Kxd7 {-1.11/9 9} 29. d5 {+3.39/11 3} Qg6 {-0.93/8 4} 30. Rf3 {+3.50/10 3} e5 {-0.89/7 2.5} 31. Rg3 {+3.34/9 3} Bc5+ {-0.89/8 2.5} 32. Kh1 {+3.26/13 3} Qh7 {-1.49/9 2.1} 33. Rh3 {+3.28/13 3} Rg6 {-1.29/8 2.2} 34. Qc1 {+3.28/13 3} Rh8 {-1.39/8 2.5} 35. Bb4 {+2.94/11 3} Bxb4 {-0.99/9 1.8} 36. cxb4 {+2.93/14 3} Rc8 {-1.29/8 2.7} 37. Rc3 {+2.98/13 3} Kd8 {-1.54/8 2.1} 38. d6 {+2.98/15 2.9} f6 {-1.85/9 2.7} 39. Rxc8+ {+3.08/14 2.8} Nxc8 {-3.02/12 2.4} 40. Qc4 {+3.47/13 2.8} Nb6 {-2.02/11 2.4} 41. Qe6 {+3.60/14 2.7} Rg5 {-3.76/10 2.7} 42. Nxh6 {+6.83/13 2.7} Rg7 {-4.05/10 1.9} 43. Qxf6+ {+7.00/15 2.7} Kd7 {-4.28/9 2.0} 44. Nf5 {+7.00/14 2.6} Rf7 {-3.88/10 1.8} 45. Qxe5 {+7.00/15 2.5} Kc8 {-4.31/9 2.6} 46. Qe8+ {+7.02/13 2.5} Kb7 {-4.18/10 3} 47. b5 {+7.03/13 2.4} Rd7 {-3.90/11 1.8} 48. Qe5 {+7.00/14 2.4} Rd8 {-3.72/10 4} 49. Qc5 {+7.00/14 2.3} Rh8 {-3.60/9 1.4} 50. h4 {+7.00/14 2.3} Rc8 {-3.78/9 1.6} 51. Qe5 {+7.01/9 2.2} Qd7 {-3.62/10 1.5} 52. Nd4 {+7.00/13 2.2} Qh7 {-3.69/10 4} 53. h5 {+7.00/14 2.1} Rh8 {-3.82/9 2.6} 54. g4 {+7.00/16 2.1} Qg8 {-3.96/8 1.2} 55. Qe7+ {+7.15/15 2.1} Ka8 {-4.33/10 1.8} 56. Nc6 {+7.00/15 2.0} Rh7 {-3.34/10 1.2} 57. Qh4 {+7.01/10 2.0} Nc8 {-3.29/9 1.7} 58. e5 {+7.01/10 2.0} Qd5+ {-3.27/8 1.5} 59. Kg1 {+7.00/13 1.9} Qd3 {-3.35/8 1.2} 60. Rb4 {+7.05/10 1.9} Qd1+ {-3.07/7 1.1} 61. Kh2 {+7.01/10 1.8} Qe2+ {-2.87/8 2.0} 62. Kh3 {+7.03/8 1.8} Qf1+ {-2.38/10 1.8} 63. Kg3 {+0.00/17 1.8} Rf7 {+0.30/11 1.5} 64. Qh2 {-3.01/9 1.7} Qe1+ {+79.96/20 0.9} 65. Kg2 {-2621.36/18 1.7} Rf2+ {+79.97/28 0.2} 66. Kg3 {-2621.38/18 1.7} Qe3+ {+79.98/28 0.2} 67. Kh4 {-2621.40/21 1.7} Rxh2# {+79.99/28 0.2} {Xboard adjudication: Checkmate} 0-1 [/pgn]