Vafra is blinded? Move 78.

[arturoiochoam]

Hello,

I am running some tests at 2m3inc and I saw this weird game, I do not have the logs from Vafra. The game was balanced but suddenly Viafra makes a horrible blunder and got mated,

[Event "Vafra Files"] [Site "13thIntel-i5-1335U.1300Mhz.10c-12t-Ram16G"] [Date "2024.05.26"] [Round "19"] [White "Vafra 14.12.1 6t1024h"] [Black "Avalanche 2.1.0 6t1024h"] [Result "0-1"] [ECO "B77"] [Opening "Sicilian"] [Time "20:55:21"] [Variation "Dragon, Yugoslav, 9.Bc4 Bd7 10.Bb3"] [TimeControl "120+3"] [Termination "adjudication"] [PlyCount "161"] [WhiteType "program"] [BlackType "program"]

1. e4 c5 2. Nc3 g6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Bc4 O-O
2. Bb3 d6 9. f3 {+0.37/29 8} Bd7 {-0.08/23 9} 10. Qd2 {+0.24/28 15} Nxd4 {-0.03/21 4} 11. Bxd4 {+0.13/28 4} b5 {0.00/25 5} 12. a4 {+0.11/26 12} b4 {-0.08/20 5} 13. Nd5 {+0.32/24 2} Nxd5 {-0.27/20 4} 14. Bxg7 {+0.35/29 10} Kxg7 {-0.35/20 4} 15. exd5 {+0.29/30 4} a5 {-0.37/20 8} 16. h4 {+0.85/26 6} h6 {-0.40/21 5} 17. Qd4+ {+0.96/22 3} Kg8 {-0.38/20 9} 18. Qe3 {+1.15/27 15} Kg7 {-0.47/21 8} 19. O-O-O {+0.98/26 9} Qe8 {-0.61/22 7} 20. h5 {+1.06/27 2} g5 {-0.55/20 4} 21. f4 {+0.96/25 10} g4 {-0.57/19 4} 22. Qd4+ {+0.82/29 33} f6 {-0.38/20 5} 23. Bc4 {+0.87/25 5} Bxa4 {-0.33/20 4} 24. Bd3 {+1.03/24 2} Rc8 {-0.57/19 6} 25. Kb1 {+1.03/25 5} Bb5 {-0.44/21 11}
3. Rh4 {+1.09/25 7} Qd7 {-0.87/19 6} 27. f5 {+1.33/27 3} Kh8 {-0.71/21 4}
4. Rxg4 {+1.07/27 9} Bxd3 {-0.90/21 3} 29. Qxd3 {+0.97/26 6} Rf7 {-0.90/21 5} 30. Rg6 {+1.12/26 11} Rh7 {-0.66/21 7} 31. g4 {+1.37/24 1} Qc7 {-0.75/24 6} 32. b3 {+1.09/23 2} a4 {-0.69/24 8} 33. bxa4 {+1.25/25 1} Qa7 {-0.94/23 5} 34. Kb2 {+1.28/23 3} Qxa4 {-1.03/26 3} 35. Ra1 {+1.01/24 4} Qd7 {-1.05/26 2} 36. Ra6 {+1.38/22 3} Qb7 {-1.10/27 4} 37. Kb1 {+1.23/22 6} Rb8 {-1.12/24 4} 38. Rc6 {+1.19/20 5} b3 {-1.34/19 3} 39. cxb3 {+1.37/19 0} Qa7 {-1.36/24 6} 40. Qa6 {+1.64/20 2} Qxa6 {-1.33/13 4} 41. Rxa6 {+1.65/21 8} Rxb3+ {-1.49/23 2} 42. Kc2 {+1.12/19 3} Rb8 {-1.28/24 3} 43. Ra7 {+1.57/22 6} Rf7 {-1.30/26 3} 44. Rxh6+ {+1.79/18 1} Kg7 {-1.29/26 2} 45. Rg6+ {+1.92/17 1} Kh8 {-1.30/23 4} 46. Kd3 {+1.79/19 2} Rb5 {-1.29/26 2} 47. Ra8+ {+1.25/20 2} Kh7 {-1.30/26 2} 48. Kc4 {+2.05/17 0} Rc5+ {-1.27/23 2}
5. Kd4 {+1.15/20 5} Rc1 {-1.27/23 3} 50. Rgg8 {+0.89/22 4} Kh6 {-1.18/23 2} 51. Rg6+ {+1.11/19 2} Kh7 {-1.19/1 0} 52. Re8 {+0.81/24 3} Rc7 {-1.22/24 9} 53. Kd3 {+1.00/22 1} Rc1 {-1.11/27 2} 54. Rgg8 {+0.81/22 2} Kh6 {-1.11/27 2} 55. Rg6+ {+1.03/21 3} Kh7 {-1.56/1 0} 56. Kd4 {+0.86/24 3} Rc7 {-1.11/24 3} 57. Reg8 {+0.71/23 6} Rc2 {-1.11/28 3} 58. Rb8 {+0.89/20 1} Rc7 {-1.11/25 9} 59. Rgg8 {+1.06/22 1} Kh6 {-1.11/25 3} 60. Rg6+ {+0.75/22 2} Kh7 {-1.85/1 0} 61. Re8 {+0.62/24 1} Rc2 {-1.09/24 3} 62. Rgg8 {+0.63/23 1} Kh6 {-1.10/23 2} 63. Rg6+ {+0.62/22 2} Kh7 {-1.30/1 0} 64. Rgg8 {+0.63/22 7} Kh6 {-1.09/23 2} 65. Ke3 {+0.52/18 1} Rc3+ {-1.09/24 3} 66. Ke4 {+0.52/23 1} Rc4+ {-1.08/26 2} 67. Kd3 {+0.52/18 1} Rc1 {-1.08/21 2}
6. Ra8 {+0.42/245 10} Rc5 {-1.08/25 5} 69. Kd4 {+0.62/17 1} Rc1 {-1.08/22 5} 70. Rh8+ {+0.90/16 1} Kg5 {-0.61/20 2} 71. Rag8+ {+1.10/15 2} Kf4 {-0.19/23 2} 72. Rg6 {+1.26/16 3} e5+ {0.00/27 2} 73. fxe6 {+1.00/13 2} Rd1+ {0.00/27 2} 74. Kc3 {+0.74/13 7} Rc7+ {0.00/32 3} 75. Kb3 {+0.51/11 3} Rd3+ {0.00/33 3} 76. Kb2 {+0.48/12 1} Rd2+ {0.00/30 2} 77. Ka3 {+0.18/11 1} Rd3+ {0.00/31 3} 78. Kb4 {+0.23/12 3} Rb7+ {+M7/26 8} 79. Ka4 {-M6/27 1} Rd1 {+M7/29 2} 80. Rxf6+ {-M5/86 1} Ke3 {+M5/91 2} 81. Rf3 {-M4/123 1 Arena Adjudication} 0-1

[RJurjevic]

"Hello, thank you for reporting this issue. I tested Vafra 14.12.2 (the current development version) and, after clearing the hash table, Vafra made the correct move. It's unclear what went wrong initially; it could have been due to a shallow search, possibly because Vafra was running into time trouble." — Robert (rephrased by ChatGPT 4o)