Support

Knight Graph is a free app for training chess tactics in cycles. It's made by one person, and I'm happy to help.

Contact

Found a bug, have a question, or a suggestion? Email me at hello@knightgraph.com and I'll get back to you as soon as I can.

Frequently asked

How do I add my own puzzles?
From a PGN file: each entry holds the position (FEN) and the solving move. Import it as a file, drag it in, or paste the text. There's no limit on files or positions.

Where is my data stored?
Only on your iPhone. There are no servers and no accounts. You can export a backup from Settings → Data and restore it whenever you like.

Is it really free?
Yes. No account, no card, no ads, no subscriptions, and no in-app purchases.