Notation vs Chess Premium+

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.

Chess Premium+ is a modern, powerful, and completely free chess app designed for players of every skill level. Whether you're learning the basics, sharpening your tactics, or challenging one of the world's strongest chess engines, Chess Premium+ provides everything you need in one elegant experience. Powered by Stockfish 18, the app delivers fast, accurate, and reliable chess analysis while maintaining smooth performance and responsive gameplay. Play complete chess games, solve tactical puzzles, create custom positions, and improve your decision-making with advanced AI—all without subscriptions or advertisements. FEATURES • Play Against Stockfish 18 Challenge one of the world's strongest chess engines with adjustable AI strength suitable for beginners through advanced players. • Daily Chess Puzzles Improve tactical vision, calculation, pattern recognition, and checkmating skills with new chess challenges. • Advanced Game Analysis Review completed games, discover mistakes, analyze critical positions, and learn stronger continuations using Stockfish 18. • Position Editor Create any custom chess position, test opening ideas, practice endgames, or explore tactical scenarios with full engine support. • Multiple AI Opponents Play against balanced, aggressive, defensive, and positional AI personalities for a varied training experience. • Achievement System Unlock trophies, complete milestones, and track your progress as you improve your chess skills. • Optimized Performance Enjoy fast engine calculations, smooth animations, responsive controls, and a stable chess experience designed for long playing sessions. WHY CHESS PREMIUM+ • 100% Free • No Advertisements • No Subscription Required • Offline Gameplay • Stockfish 18 Engine • Daily Chess Puzzles • Position Editor • Game Analysis • Modern Premium Interface • Optimized Performance Whether you want to play chess, solve puzzles, analyze games, study openings, practice endgames, or simply improve your skills, Chess Premium+ provides a complete chess experience in one beautifully designed application. Download Chess Premium+ today and start mastering chess for free.