zochess is a real time online chess platform that allows users to play, watch, and review games. Its primary function is to facilitate live chess matches between players, with matchmaking based on rating. The platform supports bullet, blitz, and rapid time controls, and includes features such as live clocks, draw and takeback offers, rematches, and in game chat. Players can also choose to face bots that are tuned to their rating level. In addition to playing, zochess offers a spectating mode. Users can follow ongoing games either live or through a delayed feed, with a live viewer count displayed. The platform also includes a built in analysis tool powered by Stockfish. Every game can be replayed with an evaluation bar, move classification, and opening book lines, allowing users to identify critical turning points. The application is available as a web client and as native apps for iOS and Android. Technical details include server synced clocks to manage latency and an engine that has been verified using perft tests. Users can also replay historical games, such as the famous Opera House game between Morphy and the Duke and Count of Brunswick. The platform is designed for browser based play or through the mobile apps.