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NMP Tweaks

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Tweak again the null move pruning preconditions.

STC:
LLR: 2.96 (-2.94,2.94) [0.50,4.50]
Total: 19675 W: 4430 L: 4169 D: 11076
http://tests.stockfishchess.org/tests/view/5d52bc0e0ebc5925cf108300

LTC:
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 73895 W: 12496 L: 12114 D: 49285
http://tests.stockfishchess.org/tests/view/5d52dcbc0ebc5925cf108552

Closes https://github.com/official-stockfish/Stockfish/pull/2268

Bench: 3690065
This commit is contained in:
VoyagerOne 2019-08-14 20:46:09 -04:00 • committed by Stéphane Nicolet
parent d799529b48
commit 0e295fee25
1 changed files with 2 additions and 1 deletions
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3
src/search.cpp
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@ -799,7 +799,8 @@ namespace {
&& (ss-1)->currentMove != MOVE_NULL
&& (ss-1)->statScore < 22661
&& eval >= beta
&& ss->staticEval >= beta - 33 * depth / ONE_PLY + 299
&& eval >= ss->staticEval
&& ss->staticEval >= beta - 33 * depth / ONE_PLY + 299 - improving * 30
&& !excludedMove
&& pos.non_pawn_material(us)
&& (ss->ply >= thisThread->nmpMinPly || us != thisThread->nmpColor))