♟ Player Prepper

Scout somebody

Type their username above and press Scout. Their games are pulled from Lichess or Chess.com, folded into an opening tree, and measured against whatever you set as your book.

No token is needed. Nothing here writes to your repertoires.

Your book

Coverage is measured against this. Add as many sources as you like -- they are folded into one book keyed by position, so move orders that transpose are counted once.

Lichess token

Optional. Nothing here needs one: every endpoint this app uses is public. A token raises the Lichess rate limit when pulling hundreds of games, and lets a private study be read as your book. It is kept in memory for this session only and never written to disk.

Export the prep sheet