Mister Queen

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.

Limitations

• Unaware of draw by repetition.
• Basic evaluation includes only material and piece-square values.