From: Vizvezdenec <Vizvezdenec@gmail.com>
Date: Sat, 13 Jun 2020 02:03:59 +0000 (+0300)
Subject: Adjust history threshold for quiet moves futility pruning
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=c44c62efc24fbe6355a9c19e287b2c78e6fd6c1d;hp=c44c62efc24fbe6355a9c19e287b2c78e6fd6c1d;ds=sidebyside

Adjust history threshold for quiet moves futility pruning

This patch adjusts the threshold for futility pruning of quiet moves
using the continuation history array contHist[5], in the same way as
it is used in movepicker.

passed STC:
https://tests.stockfishchess.org/tests/view/5ee3f88bca6c451633a9959f
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 55984 W: 10822 L: 10552 D: 34610
Ptnml(0-2): 952, 6435, 12941, 6719, 945

passed LTC:
https://tests.stockfishchess.org/tests/view/5ee4186dca6c451633a995cf
LLR: 2.96 (-2.94,2.94) {0.25,1.75}
Total: 41712 W: 5402 L: 5114 D: 31196
Ptnml(0-2): 293, 3766, 12469, 4016, 312

closes https://github.com/official-stockfish/Stockfish/pull/2734

Bench: 4715960
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