I want a fully-functional chess game for Android that lets two players face off either on the same device or online from different devices. Real-time online play is essential, so a reliable matchmaking or room-creation flow is needed alongside smooth local pass-and-play. Players will sign in with their Google or Facebook accounts; social login should handle profile pictures and basic data securely. Once in a match—whether local or online—an in-game chat bar must sit just below the board so opponents can exchange short text messages without leaving the action. Core goals • Classic chess rules enforced, including stalemate, draw offers and resignations • Local multiplayer and online multiplayer sharing a single code-base • Social media authentication (Google / Facebook) only—no email or guest mode required • Integrated in-game text chat tied to each match • Clean, touch-friendly UI that scales from small phones to tablets • Source code written for Android Studio, well-commented and handed over with build instructions • One signed APK (or AAB) ready for Play Store upload plus a debug build for testing I’ll consider solutions built with native Kotlin/Java or cross-platform stacks such as Unity or Flutter as long as they meet the above requirements and keep latency low—Firebase Realtime Database, WebSockets, or similar services are fine for the backend. After delivery I need a brief hand-off call or document outlining how to update assets, keys, and server settings so I can maintain the app myself.