Chess Park is a complete source code for a real-time online chess application for iOS and Android, built with a Firebase backend. Its UI blends nostalgic chess colors with a modern, glossy interface.

It’s a solid foundation for anyone looking to launch a new gaming project, a startup, or a dedicated chess community.

Main Features:

Server-Authoritative Multiplayer: All game logic is processed on a secure Firebase backend to prevent cheating. Moves are validated in atomic transactions to ensure data integrity.
Elo-Based Matchmaking: A Cloud Function automatically pairs players with similarly skilled opponents (±150 Elo) for fair and competitive matches.
Live Game Spectating: Watch top-rated games in real-time.
Timed Games: Full support for Bullet (1 min), Blitz (3 & 5 min), and Rapid (10 min) time controls.
Complete Game Actions: Resign, offer/accept draws, and request rematches.
Premove Functionality: Queue your next move before it’s your turn.
User Authentication & Profiles: Secure email/password sign-up with email verification, user stats, and profiles.
Global Leaderboard: A dynamic top-100 leaderboard ranks all players by Elo rating.
Lichess Puzzles: Integrated daily and random chess puzzles via the Lichess API.
Customization: Multiple board themes and piece sets for personalization.
Clean & Organized Code: Follows best practices with Provider for state management and a logical folder structure.

Package Includes:

Full Flutter Application (Frontend): Complete and well-organized source code for the iOS & Android app.
Full Firebase Project (Backend): All backend logic, game rules, security rules, and index configurations.
Full Documentation: A complete HTML file explaining every step of the setup and customization process.

Built With:

Frontend: Flutter (Cross-platform for Android & iOS)
State Management: Provider
Backend: Firebase (Firestore, Authentication, Storage, Cloud Functions)
Backend Language: TypeScript
Game Logic: Fully Backend-Authoritative

APIs Used:

Firebase
Lichess Public API

Changelog

Version 2.0

Complete UI redesign for a more modern interface.
All moves are now server-validated to prevent cheating.
Fixed potential race conditions in matchmaking and game state with atomic transactions.

Version 1.0

Initial release.

Chess Park - Flutter Multiplayer Chess App