Magic Bitboard Core

Magic Bitboard Core is a high-performance library for efficient attack computations in chess engines. It leverages Magic Bitboards to enable fast attack lookups for sliding pieces.

Features

✅ Magic Bitboard lookup tables for bishops, rooks and queens
✅ Efficient attack computations for building fast move generators in chess engines
✅ Bitwise operations for ultra-fast computations
✅ Fully documented and unit-tested for reliability

Installation & Dependencies

This project is built with Java and Maven. To use it, clone the repository and build with Maven:

Requirements:

• Java 11+
• Maven

Clone and Build:

git clone https://github.com/T-Lak/MagicBitboardCore.git
cd MagicBitboardCore
mvn clean install

Usage

To compute pseudo-legal attacks for different pieces:

Example: Queen Attacks

int square = 36;
long occupied = 0x0000001008000000L; // Some occupied squares
long attacks = Queen.getAttacks(square, occupied);
printBoard(attacks);

Printed Output:

0 1 0 0 1 0 0 1 |8
0 0 1 0 1 0 1 0 |7
0 0 0 1 1 1 0 0 |6
1 1 1 1 0 1 1 1 |5
0 0 0 1 1 1 0 0 |4
0 0 0 0 1 0 1 0 |3
0 0 0 0 1 0 0 1 |2
0 0 0 0 1 0 0 0 |1
----------------+
A B C D E F G H

Project Structure

/src
 ├── main/java/bitboard
 │     ├── attacks/        # Attack computation for all pieces
 │     ├── lookup/         # Precomputed attack tables
 │     ├── utils/          # Utility functions (e.g., bitboard printing)
 ├── test/java/bitboard    # Unit tests

Testing

Run unit tests using Maven:

mvn test

Contributing

If you find any issues or optimizations, feel free to open an issue or submit a pull request!

Attribution

This project utilizes precomputed magic numbers from Shallow Blue.

License

This project is licensed under the MIT License.