How to use this
- Tap the first square of your puzzle and type its number. Repeat for every number printed in your puzzle.
- Arrow keys move between squares. Backspace clears one.
- Press Solve next square. One square fills in, and the reason appears below the grid.
- The highlighted squares are the ones the reason is talking about.
- Check my grid looks for numbers that cannot be right, in case one was typed in wrongly.
Your puzzle is saved in this browser, so you can close the page and come back to it.