Wordfish is a free, open-source UCI chess engine implementing cutting-edge search algorithms combined with neural network evaluation. Derived from fundamental chess programming principles, Wordfish analyzes positions through parallelized alpha-beta search enhanced with null-move pruning and late move reductions.
Author: Jorge Ruiz Centelles and the Stockfish developers
Wordfish 3.10 011125 what's new?
Removed the statScore-based adjustment from the futility pruning margin to mirror the latest Stockfish simplification patch
Exposed the experience dump diagnostics command in all builds so external tooling and tests can inspect cached moves without special compile-time flags.
Made the experience table snapshot utility always available by removing the WORDFISH_TESTING guard and including the required headers, ensuring the dump command works in every build configuration.
Added to the UCI module and emit an info string during the handshake so GUIs display Large Memory Pages : available (or unavailable) based on runtime detection.
Wordfish 2.50 vs other engines:
| Lambergar 1.3 | 9.5/10 | +9 | 10 Games |
| Alexander 6.0 | 9.5/10 | +9 | 10 Games |
| Zangdar 5 | 6.5/10 | +3 | 10 Games |
| Halogen 15.4.2 | 6.5/10 | +3 | 10 Games |
| Revolution 2.70 dev-210925 | 5/10 | +0 | 10 Games |
| Alexandria 8.1.2 | 5/10 | +0 | 10 Games |
| Raid 4.0 | 4.5/9 | +0 | 9 Games |
| Yakka 1.3 | 7.5/8 | +7 | 8 Games |
| Rebel Extreme 1.1 | 7/8 | +6 | 8 Games |
| Fire 10 mingw | 5/8 | +2 | 8 Games |
| Caissa 1.23 | 4.5/8 | +1 | 8 Games |
| YuliGM Pro 20 | 4/8 | +0 | 8 Games |
| Spirit XXL | 4/8 | +0 | 8 Games |
| Pawnocchio 1.8.1 | 4/8 | +0 | 8 Games |
| Claw 3.0-M | 4/8 | +0 | 8 Games |
| HypnoS ++ 1.03 | 4/8 | +0 | 8 Games |
| SF SE-240825 | 4/8 | +0 | 8 Games |
| ShashChess 39.1 | 4/8 | +0 | 8 Games |
| SF-POLY 200825 | 4/8 | +0 | 8 Games |
| DarkZoryn 2.0 | 4/8 | +0 | 8 Games |
| PlentyChess 6.0.18 | 4/8 | +0 | 8 Games |
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