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Official Stockfish pre-release: Stockfish dev-20240530-a77a895c

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Official Stockfish pre-release
Rating CEDR=3761

Add extension condition to cutoffCnt
Decrease cutoffCnt increment by 1 if extension is 2 or greater.

Passed STC:
https://tests.stockfishchess.org/tests/view/66577a696b0e318cefa8d34d
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 99200 W: 25703 L: 25297 D: 48200
Ptnml(0-2): 253, 11660, 25390, 12022, 275

Passed LTC:
https://tests.stockfishchess.org/tests/view/665787ab6b0e318cefa8d411
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 124530 W: 31659 L: 31161 D: 61710
Ptnml(0-2): 58, 13578, 34489, 14088, 52

closes https://github.com/official-stockfish/Stockfish/pull/5310
bench 1623228

Stockfish 20240210 - results:
Stockfish 16.113.5/26+126 Games
Deep Blue 20240315-killer13/26+026 Games
Yuliirma 4.013/26+026 Games
Raid 3.6 TR13/26+026 Games
Yuli GM Pro 1612.5/26-126 Games
JigSaw 5.5i12.5/26-126 Games
Crystal 814/24+424 Games
Marauders 3.3i13/24+224 Games
Cool Iris 12.20 D-307212.5/24+124 Games
Brainlearn 2812.5/24+124 Games
ShashChess 35.212/24+024 Games
HypnoS 22042412/24+024 Games
SF-PRO 13.04.202411.5/22+122 Games
CorChess 2024042211.5/22+122 Games
RubiChess 202401124/6+26 Games
Obsidian 12.03.5/6+16 Games
SugaR AI SE3/6+06 Games
Berserk 133/6+06 Games
AbbyStein 2.82.5/5+05 Games
Ethereal 14.253/4+24 Games
PlentyChess 1.0.02/4+04 Games


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