Dev Builds » 20180228-1203

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NCM plays each Stockfish dev build 20,000 times against Stockfish 14. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.


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Commit ID 59d10374ca647feebf9323b21031e47012572fb6
Author Stefan Geschwentner
Date 2018-02-28 12:03:35 UTC
Blocked pawn storm In pawn structures like white pawns f6,h6 against black pawns f7,g6,h7 the attack on the king is blocked by the own pawns. So decrease the penalty for king safety. See diagram and discussion in A sample position that this patch wants to avoid is the following 1rr2bk1/3q1p1p/2n1bPpP/pp1pP3/2pP4/P1P1B3/1PBQN1P1/1K3R1R w - - 0 1 White pawn storm on the king side was a disaster, it locked the king side completely. Therefore, all the king tropism bonus that white have on the king side are useless, and kingadjacent attacks too. Master gives White a static +4.5 advantage, but White cannot win that game. The patch is lowering this evaluation artefact. STC: LLR: 2.94 (-2.94,2.94) [0.00,5.00] Total: 16467 W: 3750 L: 3537 D: 9180 LTC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 64242 W: 11130 L: 10745 D: 42367 This version includes reformatting and speed optimization by Alain Savard. Bench: 5643527
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