variantfishtest.py is a python script to run matches between two given UCI chess variant engines. It is mainly used for testing of Fairy-Stockfish for variants not supported by cutechess.
The script is variant-agnostic and therefore supports arbitrary variants, and relies on the correctness and consistency of the engines' rule implementation. A similar script with rule-aware game adjudication is fairyfishtest, which uses the CECP/xboard protocol to run matches.
Run python variantfishtest.py -h for instructions on usage.
python variantfishtest.py stockfish1 --e1-options EvalFile=xiangqi-28d6221e2440.nnue stockfish2 --e2-options EvalFile=xiangqi-83f16c17fe26.nnue -t 10000 -i 100 -v xiangqi -b
A typical output looks like
ELO: 103.73 +-71.1 (95%) LOS: 99.9%
Total: 100 W: 63 L: 34 D: 3
This means that
- Engine 1 is 103.73 Elo stronger than engine 2 with a statistical uncertainty of 71.1 Elo at a 95% confidence level.
- Its likelihood of superiority (LOS) is 99.9%.
- It played 100 games, with 63 wins, 34 losses, and 3 draws.
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