A highly customizable way to play chess in your terminal. Play online (via Lichess.org) and offline against the Fairy-Stockfish engine. All Lichess variants are supported.

chess variant NNUE training code for Fairy-Stockfish

Calculate game statistics for chess variants

Minimalistic chess variant GUI for Fairy-Stockfish, superseded by fairyground

Puzzle generator for chess variants

An interface for chess variants,can also apply Katago and Fairy-Stockfish to analyze games.

variant-agnostic UCI chess variant engine matches

MCTS/UCT search for chess variants

distributed chess variant engine testing

CECP/xboard variant engine matches (e.g., for bughouse)

GUI to play Othello against Fairy-Stockfish