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Allow null pruning at depth 1

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This removes a check that prevents null pruning at depth 1 PLY.

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 23445 W: 4638 L: 4521 D: 14286

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 61416 W: 8627 L: 8563 D: 44226

bench: 8145304
This commit is contained in:
ajithcj 2016-07-16 17:23:17 +00:00 • committed by Marco Costalba
parent 714329dbdc
commit f2f3a06a1a
1 changed files with 0 additions and 1 deletions
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1
src/search.cpp
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@ -729,7 +729,6 @@ namespace {
// Step 8. Null move search with verification search (is omitted in PV nodes)
if ( !PvNode
&& depth >= 2 * ONE_PLY
&& eval >= beta
&& (ss->staticEval >= beta - 35 * (depth / ONE_PLY - 6) || depth >= 13 * ONE_PLY)
&& pos.non_pawn_material(pos.side_to_move()))