A grandmaster engine and a patient coach, on one board.
Drop in any position or game and get real Stockfish analysis next to an AI coach that explains the why — not just the number. Branch every line, name every opening, all in one workspace.
From a position to real understanding
Load any position
Paste a FEN or PGN, import a game from Lichess or Chess.com, or send one straight from a screenshot.
Engine and coach read it together
Stockfish evaluates every candidate line while your AI coach turns the numbers into plain-language insight.
Explore and understand
Click any move to branch a what-if, see openings named automatically, and ask the coach anything.
A world-class engine, free for everyone
Real Stockfish runs on every position — multiple candidate lines, live evaluation, and on-demand depth up to 35. No tier locks the engine: the truth about your position is free on every plan.
Stockfish is free on every plan — we never paywall the engine.
Nh6+ sets up a smothered mate — the knight can't be taken without losing the queen.
Grounded in
A coach that explains the why — grounded in fact
Your AI coach knows the exact position and cites the live engine eval, master and player databases, and opening theory instead of inventing answers. It adapts to your level and replies in your language.
Left book at move 12 · turning point found
Every move graded, every turning point found
Review a whole game in one click. Each move is classified from brilliant to blunder, the moment you left book is flagged, and the single most instructive mistake is surfaced for the coach to walk you through.
Everything you need on one board
Branch any line
Click a move to explore a what-if; the variation tree keeps your mainline intact.
Openings named for you
Automatic ECO and opening name, plus the exact move where you left theory.
Bring any game
Import from Lichess, Chess.com, a PGN or FEN, or even a screenshot.
Save and reuse
Keep your analysis as a study, or turn the key position into a puzzle to drill.
Stop guessing. Start understanding.
Open any position in the analysis board and let the engine and your coach show you what really happened — free to start.
Get started free