Multiplayer Chess
CompletedA fully functional real-time multiplayer chess game that supports matchmaking, live game state synchronization, move validation, and spectator mode. Built with WebSockets for instant updates and a clean, responsive board UI. The game engine validates all moves server-side to prevent cheating, and supports timed games with multiple time control formats.
Why I Built This
I'm a chess enthusiast and wanted to combine my love for the game with my interest in real-time systems. Building a multiplayer chess engine from scratch was the perfect way to learn about WebSockets, game state management, and competitive matchmaking.
Role
Full Stack Developer
Duration
2.5 months
Status
Completed
Tech Stack
ReactTypeScriptNode.jsSocket.ioMongoDB
Key Features
- Real-time game synchronization via WebSockets with sub-100ms latency
- Server-side move validation to prevent cheating
- Check, checkmate, and stalemate detection engine
- Matchmaking lobby with ELO-based pairing
- Spectator mode for watching live games
- Game history with move-by-move replay and PGN export
- Multiple time controls: bullet, blitz, rapid, and classical
Challenges & Solutions
- Implemented a complete chess move validation engine covering all special moves (en passant, castling, promotion)
- Designed a scalable matchmaking system that balances wait time with fair skill matching
- Handled edge cases around disconnection, reconnection, and timeout during active games
What I Learned
- Game state management patterns for turn-based multiplayer games
- ELO rating system implementation and matchmaking algorithms
- Handling network unreliability in real-time applications