Notation: Chess Coach app analytics for May 1

Meet Nadia — your personal AI chess coach. Notation is a chess app built around one idea: you improve fastest when someone who actually understands your games tells you what you keep getting wrong. Nadia does exactly that. She reviews your games, explains mistakes in plain English, and surfaces the patterns you repeat across every game you've ever played. PLAY ANYWHERE, ANALYSE EVERYTHING Import your Lichess or Chess.com games — sign in once and they keep flowing in automatically. Play against Stockfish, Fairy-Stockfish, or Rodent IV in the app. Connect a Chessnut Air or Chessnut Move board for over-the-board games with full analysis on every move. Every game gets full engine analysis: move-by-move evaluation, mistake classification, and a weakness profile that learns what you keep getting wrong. WHAT YOU GET - Personal weakness profile across every game you've played - Blunder heatmap — which squares and pieces cost you most - Opening performance breakdown — win rate and accuracy, White and Black - Positional tendencies — castling timing, pawn structure, outposts, open files - Playing style classification - Exportable PDF coaching report - 60+ interactive lessons - Three engines: Stockfish, Fairy-Stockfish, Rodent IV - Lichess & Chess.com sync - Chessnut Air and Chessnut Move board support GO FURTHER WITH NADIA (OPTIONAL) Notation already spots your mistakes and patterns out of the box, using on-device analysis and hand-crafted coaching templates. Nadia takes the same data and puts it into natural, conversational language — less "opponent attacked undefended piece on f7 (tactical: fork)" and more "you left your knight hanging because you were focused on the queenside attack, and I get why — but watch for tactics on f7 when your king's exposed." Add your own Anthropic API key in Settings to unlock it. Your games, your key, your data. You pay Anthropic directly for what you use — typically a few pence per review. No subscription. No middleman. No markup. More providers coming. BUILT FOR PEOPLE WHO WANT TO IMPROVE Notation isn't a puzzle drill or a game database. It's a coach that looks at your actual games and tells you what's going wrong — so you can fix it. One-time purchase. No subscription. No ads. No account required. Your data stays yours.