Fill every empty square with a digit from 1 to 9 so that each row,
each column and each of the nine thick-lined boxes has every digit
exactly once. Every puzzle has exactly one answer, so one is
always there to be found. The harder levels may ask you to think a
few steps ahead.
Playing
- Pick a square
- Tap it, or move about with the arrow keys
- Put a digit in
- Tap a digit under the board, or type it
- Notes
- Turn Notes on and digits become small pencil marks, for the ones a square might be
- Clash
- Two of the same digit in a row, column or box turn red
- Check
- Marks every digit that is wrong. A hint fills in the selected square and is counted.
Tap a digit under the board with nothing selected and every copy
of it lights up, which is the quickest way to see where it can
still go.