From: Shahin M. Shahin <41402573+peregrineshahin@users.noreply.github.com>
Date: Sat, 19 Aug 2023 22:15:22 +0000 (+0300)
Subject: Reduce repetitions branches
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=440feecb4da2f051da6dafb70b4eb6cf443ccc1e;hp=440feecb4da2f051da6dafb70b4eb6cf443ccc1e;p=stockfish

Reduce repetitions branches

Increase reduction on retrying a move we just retreated that falls in a repetition:
if current move can be the same move from previous previous turn then we retreated
that move on the previous turn, this patch increases reduction if retrying that move
results in a repetition.

How to continue from there? Maybe we some variants of this idea could bring Elo too
(only testing the destination square, or triangulations, etc.)

Passed STC:
https://tests.stockfishchess.org/tests/view/64e1aede883cbb7cbd9ad976
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 424000 W: 108675 L: 107809 D: 207516
Ptnml(0-2): 1296, 47350, 113896, 48108, 1350

Passed LTC:
https://tests.stockfishchess.org/tests/view/64e32d629970091252666872
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 89682 W: 22976 L: 22569 D: 44137
Ptnml(0-2): 39, 8843, 26675, 9240, 44

closes https://github.com/official-stockfish/Stockfish/pull/4757

bench: 1574347
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