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Zero redundant material imbalance terms

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First coefficient in the SameColor array does an
equivalent job when folded into the LinearCoefficients
array.

All of the diagonal terms in the OppositeColor array
are redundant due to cancellation.

No functional change.
This commit is contained in:
Chris Caino
2013-11-04 12:44:42 +00:00
committed by Marco Costalba
parent d34bb889b1
commit 1064288b38
1 changed files with 8 additions and 8 deletions
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16
src/material.cpp
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@@ -39,11 +39,11 @@ namespace {
const Value RedundantRook = Value(554);
// pair pawn knight bishop rook queen
const int LinearCoefficients[6] = { 1817, -162, -1122, -190, 105, 26 };
const int LinearCoefficients[6] = { 1824, -162, -1122, -190, 105, 26 };
const int QuadraticCoefficientsSameColor[][PIECE_TYPE_NB] = {
// pair pawn knight bishop rook queen
{ 7 }, // Bishop pair
{ 0 }, // Bishop pair
{ 39, 2 }, // Pawn
{ 35, 271, -4 }, // Knight
{ 7, 105, 4, 7 }, // Bishop
@@ -54,12 +54,12 @@ namespace {
const int QuadraticCoefficientsOppositeColor[][PIECE_TYPE_NB] = {
// THEIR PIECES
// pair pawn knight bishop rook queen
{ 41 }, // Bishop pair
{ 37, 41 }, // Pawn
{ 10, 62, 41 }, // Knight OUR PIECES
{ 57, 64, 39, 41 }, // Bishop
{ 50, 40, 23, -22, 41 }, // Rook
{ 106, 101, 3, 151, 171, 41 } // Queen
{ 0 }, // Bishop pair
{ 37, 0 }, // Pawn
{ 10, 62, 0 }, // Knight OUR PIECES
{ 57, 64, 39, 0 }, // Bishop
{ 50, 40, 23, -22, 0 }, // Rook
{ 106, 101, 3, 151, 171, 0 } // Queen
};
// Endgame evaluation and scaling functions accessed direcly and not through