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Code Issues Releases Wiki Activity

Create useNullMove local variable

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No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski 2009-08-24 17:46:03 +03:00 • committed by Marco Costalba
parent 595a90dfd0
commit 268c53ac51
1 changed files with 15 additions and 12 deletions
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11
src/search.cpp
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@ -1281,13 +1281,15 @@ namespace {
bool mateThreat = false; bool mateThreat = false;
bool isCheck = pos.is_check(); bool isCheck = pos.is_check();
// Null move search bool useNullMove = ( allowNullmove
if ( allowNullmove
&& depth > OnePly && depth > OnePly
&& !isCheck && !isCheck
&& !value_is_mate(beta) && !value_is_mate(beta)
&& ok_to_do_nullmove(pos) && ok_to_do_nullmove(pos)
&& approximateEval >= beta - NullMoveMargin) && approximateEval >= beta - NullMoveMargin);
// Null move search
if (useNullMove)
{ {
ss[ply].currentMove = MOVE_NULL; ss[ply].currentMove = MOVE_NULL;
@ -1326,7 +1328,8 @@ namespace {
} }
} }
// Null move search not allowed, try razoring // Null move search not allowed, try razoring
else if ( !value_is_mate(beta) if ( !useNullMove
&& !value_is_mate(beta)
&& depth < RazorDepth && depth < RazorDepth
&& approximateEval < beta - RazorApprMargins[int(depth) - 2] && approximateEval < beta - RazorApprMargins[int(depth) - 2]
&& ss[ply - 1].currentMove != MOVE_NULL && ss[ply - 1].currentMove != MOVE_NULL