CorChess is a clone of Stockfish [source code] maintained for better performance on long time controls,
trying at least partially to fill the gap between regular tests and demands of correspondence players.

My main idea is to improve the following scalability of Stockfish 8.
All patches will be tested under conditions presented in the table below.

Please contact me ( about your experiences with CorChess,
or in the case that you want to be on the CorChess mailing list.

I use strong 2moves book.

Regression tests between CorChess NNUE 1.3 and Stockfish 251220 (Ryzen 7 3700X - 1 core)
Hash Time control
in seconds
#games Result Elo gain Draw rate
32 MB 80+0.8 2500 49-49-2402 0.0 96.1%
320 MB 800+8 500 4-5-491 -0.69 98.2%
800 MB 8000+80 100 0-0-100 0.0 100%
Watch the longest games LIVE.

From Stockfish to CorChess (in detail)

Motto: Alone I can nothing, with God I can everything (St. Vincent Pallotti).