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Puzzle of the day · 23 October 2026 · Mate in 2 · No. 1
Boden's crossfire
White to play and mate in two.
Win Probability
Every move, measured
Interactive evaluation charts track how advantage shifts throughout a game. Click any point to jump to that position.
Engine Analysis
Stockfish 19
Real-time position evaluation with clickable best moves and principal variations.
Opening Database
3,546 openings recognized
ECO classification with variations and suggested next moves, updated as you play.
Variation Tracking
Automatic branching
Explore alternative lines without losing your analysis. Every variation is preserved.
Evaluation Charts
Win probability visualization
See how advantage shifts move by move. Identify critical moments instantly.
Game Import
Chess.com integration & PGN support
Import your Chess.com game history. Browse by month, analyze with one click. Also supports PGN import with shareable URL encoding.
Adolf Anderssen vs Lionel Kieseritzky
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Donald Byrne vs Robert James Fischer
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Garry Kasparov vs Veselin Topalov
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Import from Chess.com or paste a PGN. Analysis runs locally — nothing is sent to a server.