Manual
Everything the app can do, in one place. The app is a progressive web app: it installs from the browser and works offline after the first visit.
Rules and the board
Clues, runs, the digit pad and pencil marks.
Your first puzzle
A short walkthrough of the first five minutes in the app.
Hints, Coach and "Why not?"
The four-stage walkthrough and the contradiction prover.
The Daily Puzzle
One puzzle a day, the same for everyone, with a share card.
Keyboard and gestures
Keys, the bottom sheet and the digit pad.
What the app does
- Generates puzzles at five difficulty levels, each with one solution and a human-only solve path.
- Solves them in front of you, step by step, and names the technique it used.
- Proves why a candidate cannot work, with the forced chain that leads to the conflict.
- Keeps your game, settings and history in the browser. Nothing is sent anywhere.