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Fix 'improving' condition

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Because VALUE_NONE is 30002, it happens that
after a check the next move is never an improving
one.

After this patch bench signature is independent from
VALUE_NONE actual value.

bench: 4303194
This commit is contained in:
Marco Costalba
2013-08-09 08:21:55 +02:00
parent fff6b9f061
commit 5769509d72
1 changed files with 4 additions and 1 deletions
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5
src/search.cpp
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@@ -775,7 +775,10 @@ moves_loop: // When in check and at SpNode search starts from here
MovePicker mp(pos, ttMove, depth, History, countermoves, ss);
CheckInfo ci(pos);
value = bestValue; // Workaround a bogus 'uninitialized' warning under gcc
improving = ss->staticEval >= (ss-2)->staticEval;
improving = ss->staticEval >= (ss-2)->staticEval
|| ss->staticEval == VALUE_NONE
||(ss-2)->staticEval == VALUE_NONE;
singularExtensionNode = !RootNode
&& !SpNode
&& depth >= (PvNode ? 6 * ONE_PLY : 8 * ONE_PLY)