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Code Issues Releases Wiki Activity

Generate moves for powerful pieces first

Browse source 
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)); Bitboard target = pos.pieces_of_color(opposite_color(us));
MoveStack* mlist_start = mlist; 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) if (us == WHITE)
mlist = generate_pawn_captures<WHITE>(pos, mlist); mlist = generate_pawn_captures<WHITE>(pos, mlist);
else else
mlist = generate_pawn_captures<BLACK>(pos, mlist); 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); mlist = generate_piece_moves<KING>(pos, mlist, us, target);
return int(mlist - mlist_start); return int(mlist - mlist_start);
} }

1
src/movepick.cpp
View file

@ -292,7 +292,6 @@ void MovePicker::score_evasions() {
} else } else
moves[i].score = H.move_ordering_score(pos.piece_on(move_from(m)), m); moves[i].score = H.move_ordering_score(pos.piece_on(move_from(m)), m);
} }
// FIXME try psqt also here
} }
void MovePicker::score_qcaptures() { void MovePicker::score_qcaptures() {