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Athena
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A UCI-compatible four-player chess engine
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Athena
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<div align="center"> <img src="./assets/logo.png" alt="Athena Chess Engine Logo" style="width: 250px; height:250px; border-radius: 10px;"/> <h3>Athena</h3> A UCI-compatible four-player chess engine </div> <div align="center"> <img src="./assets/wallpaper.png" alt="Four Player Chess Board" style="width: 100%; height:auto; border-radius: 10px;"/> </div> ## Table of Contents - [Introduction](#introduction) - [Getting Started](#getting-started) - [Commands](#commands) - [Features](#features) - [4PC Engines](#4pc-engines) - [Acknowledgements](#acknowledgements) ## Introduction *coming soon* ## Getting Started To build Athena from source, run the following commands: ```bash git clone https://github.com/arianahejazyan/Athena.git cd Athena cmake -S . -B build -DCMAKE_BUILD_TYPE=Release cmake --build build ``` Launch the interactive CLI with: ``` ./build/src/athena ``` Athena's move generator is highly optimized, achieving approximately 120 Mnps (million nodes per second) in benchmarks. You can verify this yourself: ```bash ./build/tests/perft_bench --benchmark_counters_tabular=true ``` ## Commands Athena is a UCI-compatible chess engine and supports all standard UCI commands. ### UCI Commands | Command | Description | |---------------|-----------------------------------------------------------------------------| | `uci` | Identifies the engine and returns its name, version, and supported options. | | `isready` | Checks if the engine is ready; responds with `readyok` when synchronized. | | `setoption` | Sets a configuration option (e.g. `Hash`, `Threads`). | | `ucinewgame` | Notifies the engine that a new game is about to begin. | | `position` | Sets the board position, optionally followed by a sequence of moves. | | `go` | Starts the search on the current position. | | `stop` | Stops the current search as soon as possible. | | `quit` | Shuts down the engine. | ### UCI Options | Name | Default | Description | |---------|----------|--------------------------------------------------------------| | `Setup` | `modern` | Board setup variant to use (`modern` or `classic`). | ### Debug Commands Athena also provides additional commands for testing and debugging: | Command | Description | |---------|----------------------------------------------------------------------------------| | `perft` | Runs a perft (performance test) to count legal moves at a given depth. | | `print` | Displays the current board position in the console. ## Features ### Chess - UCI protocol - 256-bit bitboard board representation - Optimized legal move generator (~120 Mnps) ### Search - Negamax - Alpha-Beta pruning - Iterative deepening ### Evaluate - Material counting ## 4PC Engines This is a list of active four-player chess (4PC) engines. Feel free to add your own engine here or ask me to include it. You can also find a list of four-player chess tools in the [Colosseum](https://github.com/arianahejazyan/Colosseum). | Engine | GitHub | Chess.com | |---------------|---------------------------------------------|------------------------------------| | Athena | [arianahejazyan/Athena](https://github.com/arianahejazyan/Athena) | [TeamAthena](https://www.chess.com/member/teamathena1) | | Samaritan | [Moxile/Samaritan](https://github.com/Moxile/Samaritan) | โ | | Enigma | [anurag-baundwal/4pchess](https://github.com/anurag-baundwal/4pchess) | [TeamEnigma](https://www.chess.com/member/teamenigma1) | | Nexus | (private) | [TeamNexus](https://www.chess.com/member/TeamNexus1) | | BlackKnight | (private) | [TeamBlackKnight](https://www.chess.com/member/TeamBlackKnight1) | | Titan | [obryanlouis/4pchess](https://github.com/obryanlouis/4pchess) | [TeamTitan](https://www.chess.com/member/teamtitan1) | | Terminator | (private) | [TeamTerminator](https://www.chess.com/member/teamterminator1) | ## Acknowledgements - **Special thanks** to Moxile for always supporting me and for the many hours of programming together. - **Special thanks** to tsoj, Lotfy and the Discord chess engine community for their help with coding and discussions. - **Special thanks** to qilp and Chess.com team for providing API access and support. - **Special thanks** to all contributors for their support and contributions.
