Fat Titz

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Photo of a Great Tit by xulescu_g, March 24, 2018, Wikimedia Commons ↩︎

Fat Titz, (FatTitz)
an UCI compatible chess engine by Tomasz Sobczyk, a fork of CFish, and a pun of Fat Fritz 2, the commercial derivative of Stockfish 12. Fat Titz uses a HalfKAv2-2048x2-64-64-1 evaluation network, which contains whopping 4 times the knowledge of Stockfish 14. It was trained partially on Lc0 data, which gives it a unique positional style, while still preserving the tactical sharpness of Stockfish. The network was trained using a modification of the state-of-the-art NNUE trainer ¹, utilizing publicly available datasets ².