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Learn · Openings
Master your openings
Build your repertoires, drill them with spaced repetition and explore every named line of the book.
How repertoire training works
Sign in to keep your repertoires, reviews and statistics.
- Step 1
Build a repertoire
Start from a line of the library, paste a PGN, or play your moves in the builder.
- Step 2
Review what is due
Every position where it is your move becomes a card. FSRS brings it back just before you would forget it.
- Step 3
Watch it stick
Streaks, retention and a review forecast, measured from your own answers.
Tools
Every way into the book — and the other half of Learn.
Library
3,533 named lines in 143 families, each with its theory and a practice mode.
Explorer
Play any moves and follow the book: names, transpositions and theory weight.
Multiverse
The book as a map — every named position a node, every move a branch.
- Learn
Training
9 drills for board vision, calculation and endgames.
Explore the book
Five ECO volumes, from flank openings to the Indian defences.