Chess Repertoire Builder

Overview

Build and manage chess repertoires directly on Chess.com and Lichess. Add lines and sidelines directly from the board, mark preferred moves, organize positions into named chapters, and import or export compatible PGN files. Practice complete repertoire lines with spaced repetition, chapter-based study, position mastery tracking, comments, annotations, and corrections after mistakes. Live Practice matches you against a realistic chess bot at a chosen Elo. You can use the bot to sharpen your play or restrict it to repertoire moves to test your knowledge.