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Blunder Detection & Game Analysis
Every move classified with Stockfish — brilliance to blunder — plus centipawn breakdown and best continuations.
Live Free and Premium match Pricing and FAQ. Roadmap items stay labeled roadmap.
Start Training Free →Every move classified with Stockfish — brilliance to blunder — plus centipawn breakdown and best continuations.
See attacks, hanging pieces, and king danger on the board as you step through moves.
Full game analysis runs Stockfish on the backend for strong, consistent evaluations and principal variations.
Browse 3,700+ openings with theory and ideas. Opening recognition tags ECO codes in your games. The Opening Repertoire Trainer is on the roadmap — not sold as live Premium.
Theme puzzles for forks, pins, skewers, and more. Free: 5/day. Premium: unlimited. Spaced repetition (SM-2) is on the roadmap — not claimed as live.
Adjustable 1000–3200 Elo for deliberate practice.
Every free account includes three Socratic coaching sessions each month. Unlimited is Premium.
Accuracy, XP, and puzzle rating rankings. Club tournament brackets are on the roadmap.
No invented Elo claims. Ship, then claim.
Targeted questions about your mistakes — active recall instead of move dumps. Free includes 3/month; Premium is unlimited.
Hear the coach explain mistakes out loud while you look at the board.
Personalized explanations on key moments, punishment lines, and follow-up questions. Stockfish classification stays Free; full walkthrough is Premium.
Routes you to recommended theme drills from your mistake patterns. Custom Personalized/My Drills from your exact game positions remain on the roadmap.
23 lessons on forks, pins, skewers, and discoveries from grandmaster games — without Elo-gain guarantees.
10 core principles with annotated grandmaster games. Complements the free Opening Explorer.
Custom drills from positions in your own games. Ship first, then market as live Premium.
Resurface missed puzzles at optimal intervals. Explicitly roadmap until it ships.
Drill your personal lines forwards and backwards. Distinct from the live Opening Explorer.