AiChessStudying openings and variations
A catalog of 3,815 lines with recall practice and perspective-based repertoires.
The local catalog contains 3,815 openings and variations, 500 ECO codes and complete move sequences from the Lichess CC0 source. These are theoretical lines, not 3,815 annotated lessons. The Academy adds 16 introductory paths with original ideas and plans.
Choose a family, variation and subvariation. Replay the line while observing development, the center and king safety. Then reconstruct it without looking. A legal move that differs from the recall line is not automatically a chess mistake.
The four Opening/Defense and White/Black areas describe your study goal and side. They share one catalog with separate repertoires and progress. They do not rename theoretical openings.
Add a few lines to your repertoire and recall them after at least 24 hours. Displayed continuations preserve the played move order; automatic recognition of every transposition is not available yet. You can export lines as PGN.