Dev Builds » 20180309-2047

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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 1093047e7d72ed0c82e143c2cc0af9ef7b0380ed
Author Alain SAVARD
Date 2018-03-09 20:47:44 UTC
Two steps slider threats on queen Allow a potential slider threat from a square currently occupied by a harmless attacker, just as the recent "knight on queen" patch. Also from not completely safe squares, use the mobilityArea instead of excluding all pawns for both SlidersOnQueen and KnightOnQueen We now compute the potential sliders threat on queen only if opponent has one queen. Run as SPRT [0,4] since it is some kind of simplification but maybe not clearly one. STC: LLR: 2.95 (-2.94,2.94) [0.00,4.00] Total: 22997 W: 4817 L: 4570 D: 13610 LTC: LLR: 2.95 (-2.94,2.94) [0.00,4.00] Total: 11926 W: 1891 L: 1705 D: 8330 After this patch is committed, we may try to: • re-introduce some "threat by queen" bonus to make Stockfish's queen more aggressive (attacking aspect) • introduce a concept of "queen overload" to force the opponent queen into passivity and protecting duties (defensive aspect) • more generally, re-tune the queen mobility array since patches in the last three months have affected a lot the location/activity of queens. Closes bench: 5788691
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