Dev Builds » 20170408-0015

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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.


Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo

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ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN


Commit ID 72a501c6fe5e4e7b61291e9603d0c6cc0902e618
Author joergoster
Date 2017-04-08 00:15:00 UTC
Fix zugzwang pruning issues By adding pos.non_pawn_material(pos.side_to_move()) as a precondition in step 13, which is already in use in Futility Pruning (child node) and Null Move Pruning for similar reasons. Pawn endgames, especially those with only 1 or 2 pawns, are simply heavily influenced by zugzwang situations. Since we are using a bitbase for KPK endgames, I see no reason to accept buggy evals as shown in #760 Patch looks neutral at STC LLR: 2.32 (-2.94,2.94) [-3.00,1.00] Total: 79580 W: 10789 L: 10780 D: 58011 and LTC LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 27071 W: 3502 L: 3390 D: 20179 Bench: 6259071 Closes #1051 Closes #760
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