Stockfish 16061007 - best chess engine

Stockfish - chess engines UCI

Previous version chess engine Stockfish 

Author compilation - 
VoyagerOne     

Information on the compilation:
Timestamp: 1465535756 

Tweak check extension condition 

There are two concepts with this patch: 

Limit check extensions by using move count. 
The idea is to limit search explosion. 

Always extend check if the first move gives check. 
The idea is to save expensive SEE calls, since the vast 
majority of first move will have SEE value >= 0, also 
first move may still be strong even if the SEE is negative. 

STC: 
LLR: 2.95 (-2.94,2.94) [0.00,5.00] 
Total: 16503 W: 3068 L: 2873 D: 10562 

LTC: 
LLR: 2.97 (-2.94,2.94) [0.00,5.00] 
Total: 37202 W: 5261 L: 5014 D: 26927 

bench: 8543366 




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