From: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Date: Sat, 31 Mar 2018 21:10:24 +0000 (+0200)
Subject: Refine SEE threshold for capture pruning.
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=f2681232e516da164196d7238482729da038ae1e;hp=f2681232e516da164196d7238482729da038ae1e;ds=sidebyside

Refine SEE threshold for capture pruning.

eloDoc suggests that this part of search is worth ~18 Elo.
This patch refines the depth dependence of the SEE threshold.

passed STC:
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 21398 W: 4474 L: 4245 D: 12679
http://tests.stockfishchess.org/tests/view/5abfb0630ebc591a560aae07

passed LTC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 9028 W: 1439 L: 1285 D: 6304
http://tests.stockfishchess.org/tests/view/5abfbff30ebc591a560aae11

Closes https://github.com/official-stockfish/Stockfish/pull/1527

Bench: 6036915
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