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Move queen vs. 3 minors rule to imbalance tables

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Tuned with CLOP after 57k games.

Simplification: tested in no-regression mode.

Passed both STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 17254 W: 3159 L: 3032 D: 11063

And LTC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 32413 W: 4967 L: 4864 D: 22582

bench: 8082049
This commit is contained in:
joergoster 2014-04-19 16:41:56 +02:00 • committed by Marco Costalba
parent a66e6e5ad9
commit 8bfb53efe2
1 changed files with 3 additions and 13 deletions
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16
src/material.cpp
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@ -34,7 +34,7 @@ namespace {
// Polynomial material balance parameters // Polynomial material balance parameters
// pair pawn knight bishop rook queen // pair pawn knight bishop rook queen
const int LinearCoefficients[6] = { 1852, -162, -1122, -183, 249, -52 }; const int LinearCoefficients[6] = { 1852, -162, -1122, -183, 249, -157 };
const int QuadraticCoefficientsSameColor[][PIECE_TYPE_NB] = { const int QuadraticCoefficientsSameColor[][PIECE_TYPE_NB] = {
// pair pawn knight bishop rook queen // pair pawn knight bishop rook queen
@ -43,7 +43,7 @@ namespace {
{ 35, 271, -4 }, // Knight { 35, 271, -4 }, // Knight
{ 0, 105, 4, 0 }, // Bishop { 0, 105, 4, 0 }, // Bishop
{ -27, -2, 46, 100, -141 }, // Rook { -27, -2, 46, 100, -141 }, // Rook
{ 58, 29, 83, 148, -163, 0 } // Queen {-161, 30, 126, 144, -127, 0 } // Queen
}; };
const int QuadraticCoefficientsOppositeColor[][PIECE_TYPE_NB] = { const int QuadraticCoefficientsOppositeColor[][PIECE_TYPE_NB] = {
@ -54,7 +54,7 @@ namespace {
{ 10, 62, 0 }, // Knight OUR PIECES { 10, 62, 0 }, // Knight OUR PIECES
{ 57, 64, 39, 0 }, // Bishop { 57, 64, 39, 0 }, // Bishop
{ 50, 40, 23, -22, 0 }, // Rook { 50, 40, 23, -22, 0 }, // Rook
{ 106, 101, 3, 151, 171, 0 } // Queen { 103, 90, -40, 142, 268, 0 } // Queen
}; };
// Endgame evaluation and scaling functions are accessed directly and not through // Endgame evaluation and scaling functions are accessed directly and not through
@ -116,16 +116,6 @@ namespace {
value += pc * v; value += pc * v;
} }
// Queen vs. 3 minors slightly favours the minors
if (pieceCount[Us][QUEEN] == 1 && pieceCount[Them][QUEEN] == 0)
{
int n = pieceCount[Them][KNIGHT] - pieceCount[Us][KNIGHT];
int b = pieceCount[Them][BISHOP] - pieceCount[Us][BISHOP];
if ((n == 2 && b == 1) || (n == 1 && b == 2))
value -= 66 * 16;
}
return value; return value;
} }