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Use only history to score non-captures

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It seems there is absolutely no difference in using gains.

After 7025 games at 5"+0
Mod vs Orig +1903 =3236 -1886 (+1 ELO)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-06-25 22:55:52 +01:00
parent f5ef5632ff
commit 40ad5194aa
1 changed files with 1 additions and 9 deletions
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10
src/movepick.cpp
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@ -221,7 +221,6 @@ void MovePicker::score_noncaptures() {
Move m; Move m;
Piece piece; Piece piece;
Square from, to; Square from, to;
int hs;
for (MoveStack* cur = moves; cur != lastMove; cur++) for (MoveStack* cur = moves; cur != lastMove; cur++)
{ {
@ -229,14 +228,7 @@ void MovePicker::score_noncaptures() {
from = move_from(m); from = move_from(m);
to = move_to(m); to = move_to(m);
piece = pos.piece_on(from); piece = pos.piece_on(from);
hs = H.move_ordering_score(piece, to); cur->score = H.move_ordering_score(piece, to);
// Ensure history has always highest priority
if (hs > 0)
hs += 10000;
// Gain table based scoring
cur->score = hs + 16 * H.gain(piece, to);
} }
} }