From 00eab733997f121cd00fbe4e37724d24ec1ef375 Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Sat, 8 Aug 2009 03:46:43 +0100 Subject: [PATCH] Revert material balance values after 100000 games After Joona's direct testing with ~2000 games it seems values after 100.000 games does not give any advantage, so revert for now. Score of Stockfish_0 vs Stockfish_15: 491 - 392 - 1102 Score of Stockfish_0 vs Stockfish_40: 461 - 439 - 1076 Score of Stockfish_0 vs Stockfish_65: 442 - 518 - 1018 (13 elo) Score of Stockfish_0 vs Stockfish_100: 504 - 502 - 984 Signed-off-by: Marco Costalba --- src/material.cpp | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/src/material.cpp b/src/material.cpp index eb271e8c..885140c0 100644 --- a/src/material.cpp +++ b/src/material.cpp @@ -41,17 +41,17 @@ namespace { const Value BishopPairEndgameBonus = Value(97); // Polynomial material balance parameters - const Value RedundantQueenPenalty = Value(358); - const Value RedundantRookPenalty = Value(536); - const int LinearCoefficients[6] = { 1740, -146, -1246, -197, 206, -7 }; + const Value RedundantQueenPenalty = Value(320); + const Value RedundantRookPenalty = Value(554); + const int LinearCoefficients[6] = { 1709, -137, -1185, -166, 141, 59 }; const int QuadraticCoefficientsSameColor[][6] = { - { 0, 0, 0, 0, 0, 0 }, { 31, -4, 0, 0, 0, 0 }, { 14, 267, -21, 0, 0, 0 }, - { 0, 7, -26, 0, 0, 0 }, { -3, -1, 69, 162, 80, 0 }, { 40, 27, 119, 174, -64, -49 } }; + { 0, 0, 0, 0, 0, 0 }, { 33, -6, 0, 0, 0, 0 }, { 29, 269, -12, 0, 0, 0 }, + { 0, 19, -4, 0, 0, 0 }, { -35, -10, 40, 95, 50, 0 }, { 52, 23, 78, 144, -11, -33 } }; const int QuadraticCoefficientsOppositeColor[][6] = { - { 0, 0, 0, 0, 0, 0 }, { -9, 0, 0, 0, 0, 0 }, { 49, 32, 0, 0, 0, 0 }, - { -25, 19, -5, 0, 0, 0 }, { 97, -6, 39, -88, 0, 0 }, { 77, 69, -42, 104, 116, 0 } }; + { 0, 0, 0, 0, 0, 0 }, { -5, 0, 0, 0, 0, 0 }, { -33, 23, 0, 0, 0, 0 }, + { 17, 25, -3, 0, 0, 0 }, { 10, -2, -19, -67, 0, 0 }, { 69, 64, -41, 116, 137, 0 } }; // Unmapped endgame evaluation and scaling functions, these // are accessed direcly and not through the function maps. -- 2.39.2