purple

Purple is a simple UCI-compliant chess engine and move generator written in Rust. This is a hobbyist project with the goal of learning, and documenting, the technologies that go into modern chess engines. An in-depth blog on the development of purple is available on the author's website

• Part 1: Writing a chess engine move generator
• Part 2: Writing a chess engine move selector

Installation

To use the purple binary, you can always build from source. Simply clone this repository and execute

$ cargo build --release

This will build an optimized binary in target/releases/purple.

Features

• Board representation using bitboards
• Compute magic numbers during application startup
• Sliding move generation using magic numbers
• Standalone legal-move generator
• Move searching using alpha-beta pruning
• Transpositon tables using Zobrist hashing
• Quiescence search
• Internal Iterative Deepending
• Late Move Reduction
• TT Move Ordering
• MVV-LVA Move Ordering
• Both a high-level API and binary are available in this repo
• UCI compliance

Planned features

• Parallel Searching
• Null Move Pruning
• 3-Fold Repition Detection

Usage

purple 
Joshua L Ervin
A UCI chess engine

USAGE:
    purple [OPTIONS]

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

OPTIONS:
    -a, --alpha-perft <depth> <fen>    run a performance test on the alpha-beta searcher
    -m, --mini-perft <depth> <fen>     run a performance test on the minimax searcher
    -p, --perft <depth> <fen>          run a performance test on the move generator