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Chess engine: Stockfish 22120915 NNUE for Windows and Linux (+1.97)

on


Stockfish 22120915 - UCI chess engine, compiled by Alfredo Menezes
Rating CEDR=3748

Timestamp: 1670601595
Extend all moves at low depth if ttMove is doubly extended

If ttMove is doubly extended, we allow a depth growth of the remaining moves.
The idea is to get a more realistic score comparison, because of the depth difference. We take some care to avoid this extension for high depths, in order to avoid the cost, since the search result is supposed to be more accurate in this case.

This pull request includes some small cleanups.

STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 60256 W: 16189 L: 15848 D: 28219 Elo +1.97
Ptnml(0-2): 182, 6546, 16330, 6889, 181
https://tests.stockfishchess.org/tests/view/639109a1792a529ae8f27777

LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 106232 W: 28487 L: 28053 D: 49692 Elo +1.42
Ptnml(0-2): 46, 10224, 32145, 10652, 49
https://tests.stockfishchess.org/tests/view/63914cba792a529ae8f282ee

closes https://github.com/official-stockfish/Stockfish/pull/4271
Bench: 3622368

Download:

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