Dev Builds » 20180812-1640

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Commit ID 41cc4eb953b2574ea8858c6d52f09fb1574179c8
Author GuardianRM
Date 2018-08-12 16:40:11 UTC
Non-linear bonus for pawn count This patch introduces a non-linear bonus for pawns, along with some (linear) corrections for the other pieces types. The original values were obtained by a massive non-linear tuning of both pawns and other pieces by GuardianRM, while Alain Savard and Chris Cain later simplified the patch by observing that, apart from the pawn case, the tuned corrections were in fact almost affine and could be incorporated in our current code base via the piece values in types.h (offset) and the diagonal of the quadratic matrix (slope). See discussion in PR#1725 : STC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 42948 W: 9662 L: 9317 D: 23969 LTC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 19683 W: 3409 L: 3206 D: 13068 How to continue from there? - Maybe the non-linearity for the pawn value could be somewhat tempered again and a simpler linear correction for pawns would work? Closes Bench: 4681496
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