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Convert PST tables to relative values

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This is a prerequisite to allow changing piece values
at runtime, needed for tuning.

Also use scores instead of separated midgame and endgame values.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-10-21 06:45:20 +01:00
parent 36cc214703
commit c555e1aa96
2 changed files with 65 additions and 150 deletions
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src/position.cpp
+5 -1
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@@ -1715,11 +1715,15 @@ void Position::init() {
zobExclusion = rk.rand<Key>();
for (Piece p = WP; p <= WK; p++)
{
Score ps = make_score(piece_value_midgame(p), piece_value_endgame(p));
for (Square s = SQ_A1; s <= SQ_H8; s++)
{
pieceSquareTable[p][s] = make_score(MgPST[p][s], EgPST[p][s]);
pieceSquareTable[p][s] = ps + PSQT[p][s];
pieceSquareTable[p+8][flip(s)] = -pieceSquareTable[p][s];
}
}
}