♟️ Java MultiChess

A minimalist, high-performance Java-based chess application featuring cloud-synchronized multiplayer and a custom AI engine.

• Online Multiplayer: Real-time synchronization via Firebase REST API using session codes. No port forwarding required.
• AI Engine: Integrated local opponent powered by the Minimax algorithm with Alpha-Beta pruning.
• Dynamic UI: Automatic 180° board rotation for the Black player and a real-time evaluation bar.
• Full FIDE Rules: Complete implementation of Castling, En Passant, Pawn Promotion, and Draw detection (3-fold repetition).

• Language: Java 25+
• Cloud Infrastructure: Firebase Realtime Database
• GUI Framework: Java Swing / AWT (Custom rendering)

1. Clone the repository.
2. Ensure the art/ folder (containing assets) remains in the same directory as the executable.
3. Run Main.java or the compiled .jar artifact.