This project is a chess engine written in C. It includes a core engine, evaluation functions, an opening book, and a DLL for integration. The project is organized for easy building and extension.
main.c— Entry point for the engine.src/— Source files for engine logic, evaluation, search, and more.include/— Header files for the engine modules.opening_book/— Opening book data and conversion tools.build/— Compiled DLL and binaries.
To build the project, ensure you have a C compiler (e.g., GCC or MSVC) installed. Use the provided Makefile:
makeThis will compile the engine and produce the necessary binaries and DLLs in the build/ directory.
- Run the engine executable after building:
./build/engine.exe engine
- To use the engine with a chess GUI, use the ChessInterface app I made.
The opening_book/ directory contains:
book.txt— Raw opening book data.convert_opening_book_to_compressed.to— Tool for converting the book. (written in Dosato)
- Search Algorithm: Implements a basic search algorithm with alpha-beta pruning.
- Quiescence Search: Enhances the search by evaluating quiet positions to avoid horizon effects.
- Transposition Tables: Uses transposition tables to store previously evaluated positions.
- Move ordering: Implements MVV-LVA move ordering to improve search efficiency.
- Iterative Deepening: Supports iterative deepening for better time management and better move ordering.
- Opening book: Uses a simple opening book to improve early game performance and introduce variety in openings.
- Material Evaluation: Evaluates positions based on material balance.
- Positional Evaluation: Evaluates positions based on piece placement and control of key squares.
- Endgame Evaluation: Special evaluation for endgame positions, considering king safety.
- Passed Pawns: Evaluates the strength of passed pawns in the position.