Find exactly where you leave theory — and learn to play it right

Ochess takes your real games and builds a repertoire from them — your openings, your mistakes, with the right theory in response.

Step 1

Import your games

Connect Lichess, Chess.com, or both at once — just by username. If you play on both, Ochess merges your games into one picture: your whole repertoire, not half of it.

Step 2

Find exactly where you go wrong

Ochess groups your games by opening — and recognizes a position even when you reach it by transposition. Then it tells you straight: “Your most common opening is X, win rate Y%. On move N you leave theory.” Not just stats — the exact spot where you lose the thread.

Step 3

Study your repertoire — and lock it into memory

From your openings, Ochess builds a repertoire by section. In Study mode the site walks you through the right moves — what to play at the divergence point it found, drawn from master games. In Train mode you recall the moves yourself, with a hint on hand if you get stuck. Your opponent’s replies are the most common ones for the rating window you choose — so you prepare against what will actually land on the board.

— Correct theory, learned once. No need to relearn it when your rating climbs.