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Gradually relax the NMP staticEval check 

Gradually relax the NMP staticEval check as we go to
higher depths.

Use tuned values.

STC
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 16745 W: 3371 L: 3168 D: 10206

LTC:
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 5906 W: 875 L: 736 D: 4295

bench: 8548212
pull/732/head
ajithcj 2016-07-14 08:14:32 +00:00 committed by Marco Costalba
parent f619f1d38c
commit 76971d8acb
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -731,7 +731,7 @@ namespace {
if ( !PvNode
&& depth >= 2 * ONE_PLY
&& eval >= beta
&& (ss->staticEval >= beta || depth >= 12 * ONE_PLY)
&& (ss->staticEval >= beta - 35 * (depth / ONE_PLY - 6) || depth >= 13 * ONE_PLY)
&& pos.non_pawn_material(pos.side_to_move()))
{
ss->currentMove = MOVE_NULL;