PGN viewer & opening detector

Paste any PGN — from Lichess, chess.com, a book, or a friend — and GameLens loads it on an interactive board, detects the opening by ECO code, and steps through the moves with engine evaluations.

From there you can launch a full review with one click: accuracy, blunder map, tactical explanations, and puzzles built from the game's mistakes.

Works with any standard PGN — multi-game files use the first game.

Also works with links

Don't have the PGN? Paste a lichess.org or chess.com game URL on the homepage and GameLens fetches the game for you automatically.