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Test killer for legality earlier

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Many killers moves, around 40%, are not legal, so
skip earlier in this case.

Some Movepicker c'tor cleanup while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-06-19 16:48:36 +01:00
parent 4e7a898d7e
commit dc5caff638
1 changed files with 7 additions and 6 deletions
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13
src/movepick.cpp
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@ -70,18 +70,18 @@ namespace {
/// search captures, promotions and some checks) and about how important good
/// move ordering is at the current node.
MovePicker::MovePicker(const Position& p, Move ttm, Depth d,
const History& h, SearchStack* ss, Value beta) : pos(p), H(h) {
MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const History& h,
SearchStack* ss, Value beta) : pos(p), H(h) {
int searchTT = ttm;
ttMoves[0].move = ttm;
lastBadCapture = badCaptures;
badCaptureThreshold = 0;
lastBadCapture = badCaptures;
pinned = p.pinned_pieces(pos.side_to_move());
if (ss && !p.is_check())
{
ttMoves[1].move = (ss->mateKiller == ttm)? MOVE_NONE : ss->mateKiller;
ttMoves[1].move = (ss->mateKiller == ttm) ? MOVE_NONE : ss->mateKiller;
searchTT |= ttMoves[1].move;
killers[0].move = ss->killers[0];
killers[1].move = ss->killers[1];
@ -98,7 +98,8 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d,
badCaptureThreshold = -PawnValueMidgame;
phasePtr = MainSearchPhaseTable;
} else if (d == Depth(0))
}
else if (d == Depth(0))
phasePtr = QsearchWithChecksPhaseTable;
else
{
@ -312,9 +313,9 @@ Move MovePicker::get_next_move() {
case PH_KILLERS:
move = (curMove++)->move;
if ( move != MOVE_NONE
&& move_is_legal(pos, move, pinned)
&& move != ttMoves[0].move
&& move != ttMoves[1].move
&& move_is_legal(pos, move, pinned)
&& !pos.move_is_capture(move))
return move;
break;