Chessence

Chessence turns the games you already play into a personalized training program.

Connect your Chess.com or Lichess username. Chessence downloads your public games, analyzes them locally on your device, and generates tactical puzzles from the positions you got wrong — or the wins you almost missed.

Key features
Personalized puzzles from your own games — no canned exercises.
Four puzzle types: mate in 1, mate in 2, hanging pieces, forks.
Interactive replay with local engine analysis.
Works offline for most training flows — no Chessence account, no ads.
Multi-account support — connect Chess.com, Lichess, or both.
Android-optimized interface.
Privacy-first — your game history and training stay primarily on your device.
How it works
Enter your Chess.com or Lichess username.
Chessence downloads your public games.
A local engine analyzes each position.
Puzzles are generated from your real mistakes and near-misses.
Train whenever you want, wherever you are — even offline.
Why Chessence
Most chess puzzle apps serve generic exercises that have nothing to do with your actual games. Chessence flips this model: it learns from your games and surfaces the exact tactical motifs you miss in real play.

Privacy
No Chessence account. No ads. Chessence is designed so your games, analysis, and progress stay primarily on your device. Limited technical diagnostics and aggregated usage data may be processed to operate the service, investigate incidents, and improve the product.

About the project
Chessence is an independent project. It has no affiliation or commercial relationship with Chess.com or Lichess.org — it simply consumes the public services those platforms make available to read games the user has already published on them.

Recent changes:
The new Repertoire tab lets you build and practice your White and Black opening repertoires, with engine-backed review and full-tree practice.
Export and import your repertoires as PGN from Settings to back them up or transfer them easily.
New engine line explorer: candidate-move arrows and on-demand analysis in Replay and Repertoire.
Built-in "how it works" guide in the Repertoire module.
Bug fixes and stability improvements.