Repertoire trainer
The Triangle
& the Swamp
Two hundred and ten lines, from game scores, book recommendations, the opening database and the stored analysis. The Colle as White, the Hippopotamus as Black. Learn them, then let the trainer decide which position you have earned the right to forget.
Optional. The trainer works fully offline; a lichess API token adds one thing, master game statistics on the Study screen. The token is stored only in this browser and sent only to lichess. Create one at lichess.org/account/oauth/token/create and grant it no scopes at all — an empty token is enough here. Never paste one that carries write permissions.
Middlegame plan
Position details
Masters database
Notation
Positions are grouped by the move you answer at. A level is cleared once 80% of its positions are solid; your level is the first one not cleared.