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Opening Library

Database & Opening Explorer

Explore chess openings with Stockfish-powered analysis and an extensive opening library. Study theoretical moves from Grandmasters, discover new variations, and build your opening repertoire with real-time engine evaluation.

Millions of Master Games

Displays the most frequently played moves in any given position, pulled directly from an extensive master chess database with GM Book and Database source badges.

Real-Time Stockfish Evaluation

While studying openings from the database, the Stockfish analysis engine evaluates the position live to assess the sharpness of the moves and classify move quality.

ECO Codes & Opening Names

Every formation you arrange will automatically detect its opening name and ECO code, making the learning process much easier.