Knight Fight

"Join the battle as a valiant knight, outsmart your opponent, and capture the enemy's king in this strategic and knightly game of Knight Fight Chess."

Play chess on a pixelated retro board. Play against a CPU player or another friend.

Grid lines and positions overlay (configurable)

Features

1. Multiple modes - Human v Human, CPU v Human, CPU vs CPU
2. Follows standard Chess rules (Now powered by python-chess)
3. Retro sound effects and music!
4. Lots of configurable options
5. Debug mode to highlight positions and grid
6. Undo last move (press Ctrl+Z)
7. Change board styles
8. Multiplayer API available. See https://www.github.com/intothevoid/chessapi for details.
9. Animated CPU piece moves
10. Retro title menu with options to save and load games
11. Smarter CPU player with multiple chess engines supported:
    • Stockfish
    • OpenAI API
    • Piece Squares (Uses minimax algorithm)
    • Piece Squares v2 (Uses minimax algorithm) - Default
    • Basic Random Moves
12. Show possible moves for selected piece, and last move made

Installation

git checkout [email protected]:intothevoid/knightfight.git
python -m venv venv
source venv/bin/activate
pip install -r requirements.txt

Usage

python3 main.py

Optional - Use Stockfish (Powerful Chess Engine)

If you would like to play against a stronger CPU player, you can install Stockfish. Stockfish is a free, open source chess engine. It is the strongest chess engine in the world.

1. Go to https://stockfishchess.org/download/ and download your version of the Stockfish chess engine
2. Copy the binary to assets/engines/stockfish (assets\engines\stockfish.exe for Windows)
3. Update the path in config.yml as shown below

config.yml - Windows

cpu:
    stockfish_path: assets/engines/stockfish.exe

config.yml - MacOS / Linux

cpu:
    stockfish_path: assets/engines/stockfish

Optional - Use OpenAI API (GPT 3.5 powered chess engine)

If you would like to play against OpenAI's GPT 3.5 powered chess engine, you can install the OpenAI API. OpenAI is a powerful AI API that can be used to generate text, images, and more.

1. Set up an OpenAI account at https://beta.openai.com/
2. Copy your API key to config.yml as shown below OR setup an environment variable called OPENAI_API_KEY
3. Update the path in config.yml as shown below (chess engine option)

config.yml (OpenAI settings)

cpu:
    ai: openai
    openai_api_key: <your api key here>

Powered By

PyGame https://www.pygame.org/

OpenAI https://www.ai.com/

Stockfish https://github.com/official-stockfish/Stockfish

Stockfish GPL 3.0 License - See https://github.com/official-stockfish/Stockfish/blob/master/Copying.txt

Stockfish Source Code - https://github.com/official-stockfish/Stockfish/tree/master/src

Dani Maccari's image assets https://dani-maccari.itch.io/

Music assets by wyver https://wyver9.itch.io/8-bit-beatem-up-soundtrack

Midjourney - Knight Fight Splash Image https://midjourney.com/

python-chess - https://python-chess.readthedocs.io/en/latest/

Simplified Evaluation Function - https://www.chessprogramming.org/Simplified_Evaluation_Function