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Generate moves for powerful pieces first

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This seems to reduce searched nodes by a
surprising 2.5%

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2008-11-24 12:13:08 +01:00
parent 5a72ff128e
commit 8a0dd93c56
2 changed files with 5 additions and 5 deletions
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9
src/movegen.cpp
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@@ -122,15 +122,16 @@ int generate_captures(const Position& pos, MoveStack* mlist) {
Bitboard target = pos.pieces_of_color(opposite_color(us));
MoveStack* mlist_start = mlist;
mlist = generate_piece_moves<QUEEN>(pos, mlist, us, target);
mlist = generate_piece_moves<ROOK>(pos, mlist, us, target);
mlist = generate_piece_moves<BISHOP>(pos, mlist, us, target);
mlist = generate_piece_moves<KNIGHT>(pos, mlist, us, target);
if (us == WHITE)
mlist = generate_pawn_captures<WHITE>(pos, mlist);
else
mlist = generate_pawn_captures<BLACK>(pos, mlist);
mlist = generate_piece_moves<KNIGHT>(pos, mlist, us, target);
mlist = generate_piece_moves<BISHOP>(pos, mlist, us, target);
mlist = generate_piece_moves<ROOK>(pos, mlist, us, target);
mlist = generate_piece_moves<QUEEN>(pos, mlist, us, target);
mlist = generate_piece_moves<KING>(pos, mlist, us, target);
return int(mlist - mlist_start);
}