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Retire Material::space_weight()

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Move all in evaluation.

Simplify the code and concentrate in a single place
all the logic behind space evaluation, making it much
more clear.

Verified also at STC it does not regress due to a possible
slow down:

LLR: 3.91 (-2.94,2.94) [-3.00,1.00]
Total: 65744 W: 13285 L: 13194 D: 39265

No functional change.
This commit is contained in:
Marco Costalba
2014-12-31 10:41:20 +01:00
parent 2416242c96
commit 4c9b423161
3 changed files with 13 additions and 23 deletions
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9
src/material.cpp
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@@ -223,15 +223,6 @@ Entry* probe(const Position& pos, Table& entries, Endgames& endgames) {
if (pos.count<PAWN>(BLACK) == 1 && npm_b - npm_w <= BishopValueMg)
e->factor[BLACK] = (uint8_t) SCALE_FACTOR_ONEPAWN;
// Compute the space weight
if (npm_w + npm_b >= 2 * QueenValueMg + 4 * RookValueMg + 2 * KnightValueMg)
{
int minorPieceCount = pos.count<KNIGHT>(WHITE) + pos.count<BISHOP>(WHITE)
+ pos.count<KNIGHT>(BLACK) + pos.count<BISHOP>(BLACK);
e->spaceWeight = make_score(minorPieceCount * minorPieceCount, 0);
}
// Evaluate the material imbalance. We use PIECE_TYPE_NONE as a place holder
// for the bishop pair "extended piece", which allows us to be more flexible
// in defining bishop pair bonuses.