ChessLab Puzzle vs Notation

Sharpen your chess skills anytime, anywhere with a powerful offline chess puzzle experience designed for real improvement. Our app gives you access to over 90 million chess puzzles, all fully available without an internet connection. Whether you’re commuting, traveling, or playing offline on purpose, you can always train your tactics and calculation skills. Each puzzle comes with its own difficulty and rating, and the app features a dynamic scoring system that tracks your progress as you solve puzzles. As you improve, your rating grows, giving you a clear sense of development over time. Don’t like a puzzle? No problem — with such a massive puzzle database, you’re free to skip any puzzle and move on instantly to the next challenge. To help you learn effectively, the app offers smart assistance tools. Hint shows the correct move directly when you need guidance, while Peek highlights only the piece that should be moved, letting you think through the solution yourself. You can also customize your experience visually by choosing between two different board themes: a classic green board or a warm brown board. Everything is designed to keep your focus on improving your chess — distraction-free, fast, and fully offline. Free usage is limited to a maximum of 5 puzzles every 10 minutes. You may wait for the limit to reset or subscribe to unlock unlimited access. Privacy Policy https://drive.google.com/file/d/1LfI4SudTysA075tw6YQM0qnVvhHyCjHd/view?usp=sharing Terms & Conditions https://drive.google.com/file/d/1C6RdLDhhnoNGpaVXjf4nVPeCZHG1shrI/view?usp=sharing

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.