Pikafish NNUE weights licence
Read the licence terms
English
Any usage of the Pikafish weights constitutes agreement to this License.
The weights file (pikafish.nnue) released with the Pikafish and the weights file further derived from them are:
- Only for legal use, any consequences caused by any use beyond the legal scope (e.g. online cheating) shall be borne by the user.
- No commercial use without permission.
The use of NNUE weights for commercial purposes by these individuals and organizations is permitted.
However, the weights we train for the xiangqi variant of Fairy-Stockfish are licensed under CC0 license. Even though they are derived from the Pikafish training data and follow the same training procedure, they are not constrained by this license.
To seek permission, please contact the official Pikafish GitHub repository or join the official Pikafish QQ group (1062385162).
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Hall of shame · Licence violations
The following organisations or individuals have violated the Pikafish NNUE weights licence and are prohibited from using the NNUE weights: