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Clean up VALUE_KNOWN_WIN conditions 

A patch (+ some extra changes) passed with:

STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 14575 W: 3101 L: 2967 D: 8507

LTC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 42579 W: 7580 L: 7496 D: 27503

Bench: 6545733

Resolves #52
pull/56/head
lucasart 2014-09-28 17:45:49 +01:00 committed by Joona Kiiski
parent ea9c424bba
commit 27a1877299
1 changed files with 1 additions and 3 deletions
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4
src/search.cpp
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@ -545,8 +545,7 @@ namespace {
&& !ss->skipNullMove
&& depth < 7 * ONE_PLY
&& eval - futility_margin(depth) >= beta
&& abs(beta) < VALUE_MATE_IN_MAX_PLY
&& abs(eval) < VALUE_KNOWN_WIN
&& eval < VALUE_KNOWN_WIN // Do not return unproven wins
&& pos.non_pawn_material(pos.side_to_move()))
return eval - futility_margin(depth);
@ -658,7 +657,6 @@ moves_loop: // When in check and at SpNode search starts from here
singularExtensionNode = !RootNode
&& !SpNode
&& depth >= 8 * ONE_PLY
&& abs(beta) < VALUE_KNOWN_WIN
&& ttMove != MOVE_NONE
/* && ttValue != VALUE_NONE Already implicit in the next condition */
&& abs(ttValue) < VALUE_KNOWN_WIN