henripru / absolute-zero

UCI/standalone bitboard chess engine.

Absolute Zero

Absolute Zero is a bitboard chess engine written in C#. It was developed from scratch to learn about chess programming and game tree searching. By default it runs with its own GUI but it supports the UCI protocol when given the -u command-line parameter. While in UCI/command-line mode it also accepts commands such as perft and divide.

General features:

• Runs with own GUI by default
• Runs in UCI/command-line mode with -u argument
• Accepts perft and divide commands in command-line mode
• Bitboard chess engine that runs in 64-bit when possible

Search features:

• Principal variation search
• Iterative deepening
• Transposition table
• Null move heuristic
• Killer move heuristic
• MVV/LVA heuristic
• Futility pruning
• Late move reductions
• Quiescence search with SEE
• Draw detection
• Mate distance pruning
• Time control heuristics

Evaluation features:

• Phase interpolation
• Piece-square tables
• Mobility evaluation
• Pawn structure evaluation
• Simple capture evaluation