Chess engine made for fun! One of my first Rust projects, but it has become increasingly capable over time. See games it has played online here - https://lichess.org/@/CrabChess
Iterative deepening using Negamax with alpha-beta pruning and Quiescence search along with all sorts of other fun and exciting techniques
You'll need rust https://rustup.rs/
Open a terminal in this repository and
cargo build --release
This bot crudely implements UCI. I use it with lichess-bot to play online and cutechess to test.
Here's an example of commands you might run (prefixed by "> ")
> uci
uciok
> ucinewgame
> position startpos moves e2e4
> go movetime 2500
info depth 2 seldepth 0 score cp 12 time 13 pv g8f6 b1c3
info depth 3 seldepth 8 score cp 48 time 40 pv g8f6 b1c3
info depth 4 seldepth 12 score cp 12 time 215 pv g8f6 b1c3
info depth 5 seldepth 21 score cp 42 time 2500 pv g8f6 e4e5
bestmove g8f6
These commands tell the bot to
- Enable uci mode
- Create a new game
- Specify a position in which, from the starting position, the move
e2e4has been made - Think for 2.5 seconds and make a move
Log files are written to crab_logs/ unless you use --quiet or -q
You can make these logs more verbose with --verbose or -v