chessy

A simple chess engine.

This is a learning project. It is much slower than other production-ready engines and may have bugs, but feel free to contribute if you wish to.

Features

• Minimal UCI support.
• Lichess integration (see this repository).

Getting started

1. Create a venv with python -m venv .venv. The exact Python required version can be found at pyproject.toml.
2. Install poetry and run $ poetry install to install dependencies.
3. Run it with $ poetry run chessy or manually with $ .venv/bin/activate followed by $ python -m chessy.core.
   • If you are trying to debug some problem, you can use the --debug (-d for short) flag to increase log level: $ poetry run chessy -d.

Planned features

Short term:

• Improve move evaluation and search.
  • Be able to process at least depth 8 within a reasonable time.
  • Quiescence search (as soon as we get some performance improvements - not right now because it will slow down things too much).

Long term:

• Advanced UCI support
  • Adapt playstyle according to wtime and btime.
  • Ponder.
  • Report more info (e.g. seldepth).
  • Maybe support customization options.

Development utils

• If you're using VSCode, we have a .vscode with recommended extensions / settings, and launch profiles.
• Alternatively, use tools/format_lint_test.bash to run all available lints. Check the script source code if you want to run any of these lints separately.

License

chessy is licensed under the GNU Affero General Public License, either version 3 or any later versions at your choice. See LICENSE.txt for more details.