https://lichess.org/uHx7ayXd#113
and reach this position
[d] 8/5kpp/p2Pp3/Qp3p2/7q/5P2/6K1/8 b - - 1 57
From there, Weini blunder twice, first with f5f4 and just after with f7g6 going from a winning score to a losing score in two moves with initially a 4 pawn advantage on the board.
Weini took those decisions at depth 13 searches with the TC used.
The recommanded Stockfish move, h4g5+ is only found at depth 14
Code: Select all
1 568 0 108 h4g5+
2 482 0 707 h4a4 a5a4
3 513 0 2379 f5f4 a5c7+ f7g6
4 533 1 4533 f5f4 a5c7+ f7g6 c7c2+
5 537 2 6445 f5f4 a5c7+ f7g6 c7c3 h4g3+
6 545 5 15534 f5f4 a5c7+ f7g6 c7c3 h4g3+ g2f1
7 547 9 29211 f5f4 a5c7+ f7g6 c7c2+ g6f6 c2c3+ e6e5
8 541 21 58621 f5f4 a5c7+ f7g6 c7c3 h4g3+ g2f1 b5b4 c3d3+
9 514 61 180786 f5f4 a5c7+ f7g6 c7c6 h7h5 d6d7 g6f7 g2f1 h4h1+
10 531 83 243664 f5f4 a5c7+ f7g6 c7c6 h7h5 d6d7 g6f7 g2f1 b5b4 c6a6
11 505 244 659039 f5f4 a5c7+ f7g6 c7c6 h4g3+ g2f1 g6f6 d6d7 f6e7 f1e2 g3g5
12 512 309 896167 f5f4 a5c7+ f7g6 c7c6 h4g3+ g2f1 g6f6 d6d7 f6e7 f1e2 g3g5 c6a6
13 508 495 1441562 f5f4 a5c7+ f7g6 d6d7 h4g3+ g2f1 g3f3+ f1e1 f3e3+ e1d1 e3g1+ d1e2 g1h2+
14 419 15033 46804812 h4g5+ g2f2 g5f4
Code: Select all
#INFO - 2018-08-28 11:27:47-436: tapered coeff 1
#INFO - 2018-08-28 11:27:47-436: material -485
#INFO - 2018-08-28 11:27:47-436: don't like to be in check 0
#INFO - 2018-08-28 11:27:47-436: Piece pair 0
#INFO - 2018-08-28 11:27:47-436: mobility -19
#INFO - 2018-08-28 11:27:47-436: pawn shield 0
#INFO - 2018-08-28 11:27:47-436: like castling 0
#INFO - 2018-08-28 11:27:47-436: connected rooks 0
#INFO - 2018-08-28 11:27:47-436: center control -15
#INFO - 2018-08-28 11:27:47-436: king troppism 0
#INFO - 2018-08-28 11:27:47-436: blocked piece 0
#INFO - 2018-08-28 11:27:47-436: + Open File 0
#INFO - 2018-08-28 11:27:47-436: + Open File near king 0
#INFO - 2018-08-28 11:27:47-436: + Double pawn 0
#INFO - 2018-08-28 11:27:47-436: + Isolated pawn -30
#INFO - 2018-08-28 11:27:47-436: + Space 0
#INFO - 2018-08-28 11:27:47-436: + Positionnal 41
#INFO - 2018-08-28 11:27:47-436: + Bad bishop 0
#INFO - 2018-08-28 11:27:47-436: + Pawn storm 0
#INFO - 2018-08-28 11:27:47-436: + Pawn (candidate) -10
#INFO - 2018-08-28 11:27:47-436: + Pawn (passed) -14
#INFO - 2018-08-28 11:27:47-436: => white 60
#INFO - 2018-08-28 11:27:47-436: => black 74
#INFO - 2018-08-28 11:27:47-436: all other -13
#INFO - 2018-08-28 11:27:47-436: random noise 0
#INFO - 2018-08-28 11:27:47-436: Static score : -532
This kind of blunder is only due to horizon effect or there are things that can be done in the evaluation (better passed pawn scoring ?) to handle this ?