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Simplify IID

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STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 30468 W: 5687 L: 5582 D: 19199
http://tests.stockfishchess.org/tests/view/57b1ddd80ebc591c761f63e2

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 87406 W: 11756 L: 11725 D: 63925
http://tests.stockfishchess.org/tests/view/57b212590ebc591c761f63f9

bench: 6554900
This commit is contained in:
VoyagerOne 2016-08-15 11:19:21 -04:00 • committed by Marco Costalba
parent 8493c8c6b8
commit 5596492f6e
1 changed files with 2 additions and 3 deletions
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5
src/search.cpp
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@ -801,13 +801,12 @@ namespace {
}
// Step 10. Internal iterative deepening (skipped when in check)
if ( depth >= (PvNode ? 5 * ONE_PLY : 8 * ONE_PLY)
if ( depth >= 6 * ONE_PLY
&& !ttMove
&& (PvNode || ss->staticEval + 256 >= beta))
{
Depth d = depth - 2 * ONE_PLY - (PvNode ? DEPTH_ZERO : depth / 4);
ss->skipEarlyPruning = true;
search<NT>(pos, ss, alpha, beta, d, cutNode);
search<NT>(pos, ss, alpha, beta, 3 * depth / 4 - 2 * ONE_PLY, cutNode);
ss->skipEarlyPruning = false;
tte = TT.probe(posKey, ttHit);