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Author: Muzhen Gaming
Date: Sun May 5 15:11:53 2024 +0200
Timestamp: 1714914713

VVLTC search tune

This patch is the result of two tuning stages:
1. ~32k games at 60+0.6 th8:
https://tests.stockfishchess.org/tests/view/662d9dea6115ff6764c7f817
2. ~193k games at 80+0.8 th6, based on PR #5211:
https://tests.stockfishchess.org/tests/view/663587e273559a8aa857ca00.
Based on extensive VVLTC tuning and testing both before and after
#5211, it is observed that introduction of new extensions positively
affected the search tune results.

Passed VVLTC 70+0.7 th7 1st sprt: https://tests.stockfishchess.org/tests/view/6636c6f04b68b70d85801409
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 18566 W: 4864 L: 4620 D: 9082 Elo +4.57
Ptnml(0-2): 0, 1608, 5827, 1844, 4

Passed VVLTC 70+0.7 th7 2nd sprt: https://tests.stockfishchess.org/tests/view/6636d4b84b68b70d85802ab7
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 43142 W: 11141 L: 10838 D: 21163 Elo +2.44
Ptnml(0-2): 4, 3915, 13427, 4224, 1

Passed VVLTC 70+0.7 3rd sprt: https://tests.stockfishchess.org/tests/view/66376b4f9819650825aa230b
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 40322 W: 10374 L: 10076 D: 19872 Elo +2.57
Ptnml(0-2): 1, 3660, 12544, 3952, 4

The first two sprts were run against passed #5211. The third sprt was
run against latest master.

closes https://github.com/official-stockfish/Stockfish/pull/5216

Bench: 2180675
see source