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Retire linear imbalance

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Retire linear imbalance and compensate
in piece values enumeration.

STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 43596 W: 8105 L: 8023 D: 27468

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 24482 W: 3352 L: 3237 D: 17893

Bench: 7777707
This commit is contained in:
Stefano80 2016-08-30 20:15:51 +02:00 • committed by Marco Costalba
parent 5cffc032da
commit 7f2eb10e93
2 changed files with 8 additions and 11 deletions
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7
src/material.cpp
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@ -31,13 +31,10 @@ namespace {
// Polynomial material imbalance parameters // Polynomial material imbalance parameters
// pair pawn knight bishop rook queen
const int Linear[6] = { 1667, -168, -1027, -166, 238, -138 };
const int QuadraticOurs[][PIECE_TYPE_NB] = { const int QuadraticOurs[][PIECE_TYPE_NB] = {
// OUR PIECES // OUR PIECES
// pair pawn knight bishop rook queen // pair pawn knight bishop rook queen
{ 0 }, // Bishop pair {1667 }, // Bishop pair
{ 40, 2 }, // Pawn { 40, 2 }, // Pawn
{ 32, 255, -3 }, // Knight OUR PIECES { 32, 255, -3 }, // Knight OUR PIECES
{ 0, 104, 4, 0 }, // Bishop { 0, 104, 4, 0 }, // Bishop
@ -100,7 +97,7 @@ namespace {
if (!pieceCount[Us][pt1]) if (!pieceCount[Us][pt1])
continue; continue;
int v = Linear[pt1]; int v = 0;
for (int pt2 = NO_PIECE_TYPE; pt2 <= pt1; ++pt2) for (int pt2 = NO_PIECE_TYPE; pt2 <= pt1; ++pt2)
v += QuadraticOurs[pt1][pt2] * pieceCount[Us][pt2] v += QuadraticOurs[pt1][pt2] * pieceCount[Us][pt2]

12
src/types.h
View file

@ -183,13 +183,13 @@ enum Value : int {
VALUE_MATE_IN_MAX_PLY = VALUE_MATE - 2 * MAX_PLY, VALUE_MATE_IN_MAX_PLY = VALUE_MATE - 2 * MAX_PLY,
VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY, VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
PawnValueMg = 198, PawnValueEg = 258, PawnValueMg = 188, PawnValueEg = 248,
KnightValueMg = 817, KnightValueEg = 896, KnightValueMg = 753, KnightValueEg = 832,
BishopValueMg = 836, BishopValueEg = 907, BishopValueMg = 826, BishopValueEg = 897,
RookValueMg = 1270, RookValueEg = 1356, RookValueMg = 1285, RookValueEg = 1371,
QueenValueMg = 2521, QueenValueEg = 2658, QueenValueMg = 2513, QueenValueEg = 2650,
MidgameLimit = 15581, EndgameLimit = 3998 MidgameLimit = 15258, EndgameLimit = 3915
}; };
enum PieceType { enum PieceType {