Mr. Queen is a chess engine written in C.

Features

- Bitboards and "magic" bitboards for board representation and super-fast move generation.
- Custom, hash-based opening book based on over three million games from the FICS database.
- Zobrist hashing and a transposition table storing exact values and the best move.
- Null move pruning, aspiration windows, iterative deepening, quiescence search.
- Supports the Universal Chess Interface (UCI).
- Passes all perft tests.

https://github.com/fogleman/MisterQueen