Opening Repertoire & Explorer
See what your opponents actually play, build your repertoire from your own games, and catch every deviation in your game review.
See what your opponents play
An explorer built from your own games: the replies you actually face and your real score from each position.
Build your repertoire
Drag lines onto the board as White or Black, add per-position notes and arrows, check ideas with Stockfish, import a PGN.
True positional matching
Positions are matched by what is on the board, not the move order, so transpositions are understood as the same position. Your prep, stats, and notes follow the position however you reached it.
Catch every deviation
Review any game and see exactly where you left your prep, and which opponent moves you have not covered yet.