Fritz 19 GUI one sided draw

[cc2150dx]

[pgn][Event "Jason, Blitz 5.0min+3.0sec"]
[Site "?"]
[Date "2025.02.03"]
[Round "19"]
[White "Obsidian 15.0"]
[Black "Lc0 v0.31.0-dag+git.2ea50ea1"]
[Result "1/2-1/2"]
[Annotator "0.92;1.01"]
[ECO "E97"]
[PlyCount "173"]
[GameId "2141362212174364"]
[TimeControl "300+3"]

{AMD Ryzen 5 3600 6-Core Processor 3600 MHz W=29.4 plies; 12,962kN/s; 106,674 TBAs B=22.9 plies; 10kN/s} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. O-O Nc6 8. d5 Ne7 9. Nd2 Nd7 10. b4 f5 11. f3 f4 {Both last book move} 12. c5 {0.92/32 15} g5 {1.01/17 30} 13. a4 {0.76/33 40 (Nc4)} Ng6 {0.96/18 38} 14. a5 {0.82/28 7 (Nc4)} h5 {0.77/15 7 (Nf6)} 15. a6 {1.11/28 6 (Ra2)} b6 {1.21/18 8} 16. c6 {1.25/29 8} Nf6 {1.68/15 6} 17. g4 {1.29/30 10} fxg3 {1.72/15 9} 18. hxg3 {1.04/29 18} Bh6 {1.72/16 11} 19. Nc4 {1.15/29 11} Rf7 {1.65/16 10} 20. Bd2 {1.18/29 7 (Ra2)} Qf8 {1.69/12 11} 21. Qc1 {0.97/30 12} Kh8 {1.90/17 8 (Rg7)} 22. Kf2 {1.49/31 16 (Kh2)} h4 {1.71/20 11} 23. gxh4 {1.28/33 10} Bh3 {2.06/21 5 (gxh4)} 24. hxg5 {1.88/30 7} Ng4+ {2.47/20 5} 25. Kg1 {2.25/32 10} b5 {1.57/25 8 (Bxf1)} 26. Nxb5 {1.14/30 12} Nf4 {1.20/27 6} 27. Bxf4 {1.32/31 5} Rxf4 {1.14/23 5} 28. Qe1 {1.60/33 7 (Nxc7)} Bxg5 {1.12/24 16} 29. Qg3 {1.74/34 7} Bxf1 {1.09/25 11} 30. Rxf1 {1.77/36 8} Qb8 {1.06/21 0} 31. Nc3 {1.67/39 10} Qxb4 {1.06/24 8} 32. fxg4 {1.73/36 6} Raf8 {1.02/23 5} 33. Rxf4 {1.85/37 12} Bxf4 {1.04/23 5} 34. Qd3 {1.81/35 5} Rf7 {1.02/23 9} 35. Bf3 {1.83/36 6} Rh7 {1.05/21 6} 36. Kf2 {1.83/34 5 (Kf1)} Qb3 {0.96/18 28} 37. Ne3 {1.84/34 6 (Kf1)} Qb2+ {1.08/17 18} 38. Nc2 {1.81/34 6} Qb6+ {1.12/18 7} 39. Kf1 {1.75/36 8} Qb3 {1.13/16 6} 40. Bg2 {1.88/33 5} Rf7 {1.23/16 6} 41. Ke2 {1.92/35 12} Qb6 {1.28/16 30 (Kg8)} 42. Nd1 {1.99/31 4} Rf8 {1.28/16 5} 43. Ne1 {1.69/34 8} Qa5 {1.33/14 6} 44. Bf3 {1.78/31 4} Bg5 {1.37/17 11} 45. Kf1 {2.11/33 6} Kg8 {1.40/17 16 (Kg7)} 46. Nc2 {2.07/36 18} Qa2 {1.45/22 2} 47. Nf2 {1.72/36 9} Qb2 {1.50/18 9 (Bh4)} 48. Nh3 {1.88/32 5 (Kg2)} Bc1 {1.49/17 15 (Bh4)} 49. g5 {2.25/34 7} Bxg5 {1.46/20 3} 50. Nxg5 {1.53/39 12} Qc1+ {1.43/20 4} 51. Ke2 {2.11/43 14} Qxg5 {1.38/18 5} 52. Qe3 {2.33/36 4} Qg3 {1.38/14 3} 53. Na3 {2.40/35 4 (Qf2)} Qh2+ {0.94/17 10 (Rb8)} 54. Qf2 {4.05/30 4} Qxf2+ {0.93/16 0 (Qh3)} 55. Kxf2 {5.19/28 4} Rb8 {0.85/15 6} 56. Be2 {4.93/44 7} Rb3 {0.78/15 7 (Kf7)} 57. Nb5 {4.82/36 47} Rxb5 {0.71/15 7} 58. Bxb5 {5.06/30 2} Kg7 {0.64/17 8 (Kf7)} 59. Kg3 {5.03/28 18 (Be2)} Kf8 {0.56/21 12} 60. Kg4 {5.71/26 3 (Be2)} Ke8 {0.41/26 5 (Kf7)} 61. Kg5 {5.38/23 6 (Kf5)} Kd8 {0.38/32 2} 62. Kf6 {5.71/19 2} Kc8 {0.34/35 3} 63. Bc4 {5.69/26 3 (Ke7)} Kb8 {0.33/36 4 (Kd8)} 64. Kg5 {4.68/18 5 (Be2)} Ka8 {0.34/36 4 (Kc8)} 65. Be2 {4.71/16 1} Kb8 {0.35/1 0} 66. Kf5 {6.05/23 3 (Kf6)} Ka8 {0.31/36 6} 67. Kg4 {5.88/23 6 (Ke6)} Kb8 {0.30/1 0} 68. Kg5 {5.94/20 2} Ka8 {0.28/36 6 (Kc8)} 69. Bb5 {5.70/27 4 (Kf6)} Kb8 {0.24/1 0} 70. Kf5 {5.66/24 3 (Kf6)} Ka8 {0.19/35 7} 71. Kf6 {5.70/22 3 (Ke6)} Kb8 {0.18/1 0} 72. Be2 {6.01/21 2 (Ke7)} Ka8 {0.20/35 6} 73. Bh5 {6.11/22 4 (Ke7)} Kb8 {0.23/1 0} 74. Bg6 {5.61/24 3 (Ke7)} Ka8 {0.02/34 7} 75. Bf5 {5.81/25 3 (Ke7)} Kb8 {0.01/1 0} 76. Kg7 {5.96/21 3 (Ke7)} Ka8 {0.01/1 0} 77. Bg4 {6.13/24 3 (Bc8)} Kb8 {0.01/1 0} 78. Bf3 {5.70/24 3 (Kf6)} Ka8 {0.00/34 10} 79. Bh5 {5.11/21 3 (Bg4)} Kb8 {0.01/1 0} 80. Bg6 {5.96/21 2 (Kf7)} Ka8 {0.00/34 7} 81. Bf7 {6.04/22 2 (Kf6)} Kb8 {0.01/1 0} 82. Bh5 {5.26/26 3 (Kf8)} Ka8 {0.00/34 7 (Kc8)} 83. Kf8 {5.95/23 3 (Kf6)} Kb8 {0.00/1 0} 84. Be8 {5.29/23 3 (Ke7)} Ka8 {0.00/31 8} 85. Bh5 {5.92/28 3 (Ke7)} Kb8 {0.00/1 0} 86. Kg7 {5.69/23 3 (Ke7)} Ka8 {0.00/26 5 (Kc8)} 87. Kg8 {4.92/22 2 (Kf6) Draw accepted} 1/2-1/2

[/pgn]

This is one example of an one sided draw. Fritz is only reading black as a draw. Why doesn't it look at both white and black evals. I think this is a bug ?

[Ferdy]

The draw is due to the 50-move draw rule. It is actually White that is not telling the truth.

[Brunetti]

The draw is due to the 50-move draw rule.

Last capture is at move 58!

Alex

[Ajedrecista]

Hello:

The draw is due to the 50-move draw rule.

Last capture is at move 58!

Alex

I disagree with Ferdy this time: white is the one misevaluating the position. Black is safe in a8-b8 and LSB is worthless because all black pawns are on dark squares. Finally, the white king can not capture the c-pawn without stalemating the black king. I do not see a different outcome if we remove d and e pawns, with B×R drawing:

https://syzygy-tables.info/?fen=6k1/p1p ... _w_-_-_0_1

OTOH, I also think that the GUI claimed the draw too early in view of white evals and when the last capture was.

Regards from Spain.

Ajedrecista.

[Ferdy]

The draw is due to the 50-move draw rule.

Last capture is at move 58!

Alex

Sorry indeed this is not a draw by a 50-move.

[Ferdy]

This is one example of an one sided draw. Fritz is only reading black as a draw. Why doesn't it look at both white and black evals. I think this is a bug ?

Looks like a bug. I reported it to chessbase.

[Ferdy]

It is actually White that is not telling the truth.

A sample game where Obsidian detects an impending draw.

[pgn]
[Event "Blitz 5.0min+5.0sec"]
[Site "?"]
[Date "2025.02.09"]
[Round "1"]
[White "Obsidian 15.0"]
[Black "Lc0 v0.31.1"]
[Result "1/2-1/2"]
[Annotator "3.95;1.45"]
[SetUp "1"]
[FEN "6k1/p1p5/P1Pp4/1B1Pp3/4P3/8/5K2/8 b - - 0 58"]
[PlyCount "100"]
[GameId "2143203633735870"]
[TimeControl "300+5"]

{12th Gen Intel(R) Core(TM) i5-12450H 2496 MHz W=31.7 plies; 3,169kN/s B=9.9 plies; 88kN/s} 58... Kf7 {1.45/7 17 Both last book move} 59. Kg3 {3.95/37 15} Ke8 {1.35/7 3 (Ke7)} 60. Kh4 {4.35/37 235 (Bf1)} Kd8 {0.95/9 13 (Kf8)} 61. Kg5 {4.05/31 39 (Be2)} Kc8 {0.85/10 12} 62. Be2 {4.33/28 9 (Kf6)} Kb8 {0.82/11 10 (Kd8)} 63. Kg6 {4.87/28 21 (Bh5)} Ka8 {0.75/11 18 (Kc8)} 64. Bh5 {5.45/27 3} Kb8 {0.77/1 0} 65. Kf6 {4.07/28 9 (Kf5)} Ka8 {0.76/11 16 (Kc8)} 66. Kf7 {5.90/27 1 (Ke7)} Kb8 {0.76/1 0} 67. Bf3 {5.20/28 9 (Ke7)} Ka8 {0.68/11 22} 68. Ke6 {5.66/27 2 (Bg4)} Kb8 {0.69/1 0} 69. Kf6 {3.96/29 6 (Bh5)} Ka8 {0.71/11 24 (Kc8)} 70. Kf7 {3.90/28 3 (Ke6)} Kb8 {0.71/1 0} 71. Bg4 {3.94/29 5 (Ke6)} Ka8 {0.70/1 0} 72. Kg8 {3.72/28 3 (Ke6)} Kb8 {0.52/1 0} 73. Kh7 {3.73/29 3 (Bh5)} Ka8 {0.14/1 0} 74. Bh3 {4.57/27 13 (Kg8)} Kb8 {0.57/2 0} 75. Kg6 {5.48/26 2 (Be6)} Ka8 {0.54/1 0} 76. Kh5 {5.21/29 9 (Kf7)} Kb8 {0.62/1 0} 77. Bf5 {5.37/25 3} Ka8 {0.28/1 0} 78. Bg4 {5.52/24 4} Kb8 {0.52/1 0} 79. Be6 {3.90/26 9} Ka8 {0.25/1 0} 80. Kg6 {4.01/28 6} Kb8 {0.68/1 0} 81. Kg7 {4.05/23 2} Ka8 {0.27/1 0} 82. Bc8 {5.53/27 6} Kb8 {0.59/1 0} 83. Bf5 {5.35/29 2} Ka8 {0.58/1 0} 84. Bg4 {5.47/26 2} Kb8 {0.41/1 0} 85. Kg8 {5.56/26 3} Ka8 {0.35/1 0} 86. Kh8 {5.37/33 14} Kb8 {0.36/1 0} 87. Kg7 {5.37/29 3} Ka8 {0.36/1 0} 88. Kg8 {4.96/30 7} Kb8 {0.29/1 0} 89. Be2 {5.58/27 6} Ka8 {0.49/14 151 (Kc8)} 90. Kh8 {5.26/26 6 (Kf7)} Kb8 {0.52/1 0} 91. Kg7 {3.11/26 6 (Bg4)} Ka8 {0.59/13 63} 92. Kf8 {4.83/24 1 (Kf6)} Kb8 {0.55/1 0} 93. Kf7 {5.44/24 4 (Bg4)} Kc8 {0.57/13 41} 94. Bd3 {5.50/24 5 (Bg4+)} Kd8 {0.55/12 11 (Kb8)} 95. Bc2 {5.71/23 4 (Be2)} Kc8 {0.51/1 0} 96. Bd1 {2.76/23 10 (Ke7)} Kd8 {0.56/11 18 (Kb8)} 97. Bh5 {5.71/21 3 (Ke6)} Kc8 {0.58/1 0} 98. Ke8 {2.93/20 7} Kb8 {0.60/1 0} 99. Ke7 {2.59/19 5 (Bg6)} Ka8 {0.52/9 16} 100. Be2 {2.50/18 6 (Kd7)} Kb8 {0.52/1 0} 101. Kf7 {3.40/16 5 (Kd8)} Kc8 {0.46/8 25} 102. Ke8 {1.05/14 5 (Ke7)} Kb8 {0.14/1 0} 103. Bd1 {0.93/14 5 (Kd8)} Kc8 {0.07/8 20} 104. Ke7 {0.00/44 6 (Bg4+)} Kb8 {0.07/1 0} 105. Kd7 {0.00/95 3} Ka8 {0.06/1 0} 106. Bh5 {0.00/123 1 (Kxc7)} Kb8 {0.07/1 0} 107. Bd1 {0.00/123 1 (Kd8)} Ka8 {0.07/1 0} 108. Kxc7 {0.00/123 1 Draw accepted} 1/2-1/2
[/pgn]
So there is no issues with Obsidian scoring.