Solo · about 2 minutes
Sudoku
One nine-by-nine grid, filled a square at a time. Answer correctly and the square is yours; answer wrongly and the right digit goes in anyway and the square is your opponent's. Whoever holds more of the twenty-seven lines wins.
Play together hereTwo of you on this device, sharing the screen.
Play against a botBo takes the other seat, at three levels.
Play soloChase your own best score, no opponent needed.
- On a keyboard
- Player one W A S D then Space, player two arrows then Enter: pick a square, then a digit
- By touch
- Tap a bright square, then tap a digit on the pad below the grid