Notation vs AI Chess Coach

Notation is a chess coaching app that teaches you why — not just what. Every chess evaluation comes from Stockfish 18, running entirely on your device. Every pattern, weakness, and tactical motif is detected by hand-tuned on-device classifiers built on decades of coaching theory. The language model's only job is the last step: explaining what the analysis found, in plain English, like a coach sitting next to you. The chess is never generated. It's explained. THREE COACHING FRAMEWORKS Notation is the first chess app to operationalise multiple grandmaster-level coaching frameworks as deterministic measurement: • Dan Heisman's seven positional elements — Mobility, Vulnerability, Centre Control, Coordination, Speed, Time, Flexibility — measured per-position with super-GM baselines • Jeremy Silman's coaching emphasis frames — fifteen frames choosing what to teach at each moment • Jacob Aagaard's positional predicates — Where are the weaknesses? Which is the worst-placed piece? What's the opponent's plan? All computed on-device. All deterministic. The same principles human coaches have used for decades, encoded into classifiers that run before the language model ever sees the position. GAME REVIEW Every game gets a coherent on-device review — no API key needed, no internet, no cost. Template-driven narrative against the full coaching substrate. When you want depth, upgrade once with your own Anthropic or OpenAI API key, o ruse the On Device LLM with no additional costs and the richer review becomes the permanent artefact for that game. Nadia comments on at most six moments — only the ones worth learning from. PDF export of every review. PLAYER PROFILE Style axes — Aggression, Tactical Alertness, Positional Play, Endgame — derived from the substrate with confidence bands. The seven Heisman elements sit below as evidence. Full-screen iPad dashboard. PDF coaching report you could hand to a human coach. OPPONENT SCOUTING & MATCHUP REPORTS Scout reports surface the full eight-axis substrate on any opponent. How-to-play-against framing with concrete suggestions. Player-vs-opponent comparison across all axes with weakest-phase detection. SHADOW — YOUR CHESS TWIN Shadow learns how you play and saves checkpoints. Play yourself from six months ago. See how far you've come. Coming soon: calibrate Shadow to your real-life rivals by importing their games. PLAY ON YOUR PHYSICAL BOARD Pair with Chessnut Air, Pro, Go, Air+ and Move over Bluetooth. Notation tracks every move on real wood while Nadia coaches. PRIVACY BY DESIGN Stockfish on-device. All coaching classifiers on-device. Cohort baselines on-device. Optional cloud AI is bring-your-own-key — your Anthropic or OpenAI API key, your account, your data. We never see it. Leave the field blank and Notation works fully without it. IMPORT YOUR GAMES Connect Lichess or Chess.com. Import PGN files. Nadia analyses everything in the background. £2.99. One-off. No subscription. No ads. No tracking. Yours forever.

Stuck at the same rating? Tired of hanging pieces and blowing winning positions? Chessy is an AI chess coach you actually talk to. Connect your Chess.com or Lichess account, and your coach knows every game you've played — your patterns, your blunders, your rating history. Then just ask. A COACH, NOT AN APP FULL OF MENUS Chessy opens straight into a conversation. Ask anything, in plain English: "Review my last game" — your coach walks you through it with an interactive board right in the chat, showing exactly where the game turned and why. "Teach me king and pawn endgames" — it sets up the board and coaches you through it, move by move. "What should I work on?" — it knows your weaknesses and tells you, then takes you there. "How am I doing in rapid?" — it answers with your own numbers on a card, and every number opens the games behind it. Play out any position on the board mid-conversation. Try the move you wanted to play and see why it works or fails. Ask why. It answers — about YOUR games, not generic theory. YOUR WHOLE CHESS LIFE, ONE CONVERSATION AWAY Your coach can pull up anything or take you anywhere: Insights — accuracy, blunders, win rates, and when you play your best Rating DNA — your chess archetype, mapped on a shareable spider chart Weekly coaching report every Sunday — a personalized breakdown of your week's games. No other chess app does this. Puzzles built from YOUR games — practice the exact positions where you blundered Daily lessons targeted at your weaknesses 80+ openings with guided walkthroughs, chess traps, bots at every level, daily puzzle with streaks ELO goal tracking — set a target, watch your progress CHESSY PRO Unlock everything with Chessy Pro: Monthly ($7.99/mo), Annual ($49.99/yr — save 48%), or Lifetime ($79.99 one-time). Includes unlimited coach conversations, full insights, weekly AI reports, personalized lessons, and ELO goal tracking. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stlsb/ Terms of Use: https://chessyapp.com/terms Privacy Policy: https://chessyapp.com/privacy