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Chess engine: Stockfish 21031920

on

Stockfish - UCI chess engine, compiled by Guy Vreuls
Rating JCER=3151

Timestamp: 1616182137
Use reference instead of pointer for pop_lsb() signature

This patch changes the pop_lsb() signature from Square pop_lsb(Bitboard*) to
Square pop_lsb(Bitboard&). This is more idomatic for C++ style signatures.

Passed a non-regression STC test:
LLR: 2.93 (-2.94,2.94) {-1.25,0.25}
Total: 21280 W: 1928 L: 1847 D: 17505 Elo +1.32
Ptnml(0-2): 71, 1427, 7558, 1518, 66
https://tests.stockfishchess.org/tests/view/6053a1e22433018de7a38e2f

We have verified that the generated binary is identical on gcc-10.
Closes https://github.com/official-stockfish/Stockfish/pull/3404
No functional change.

Stockfish 21031920 and NNUE download

 

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