Game setup
Everything here changes the table behind this card as you set it.
Look
Model
2
3
8
1
9
7
2
6
1
3
8
6
4
3
4
7
2
4
8
1
6
9
2
8
5
7
4
2
4
6
9
7
9
7
4
3
3
6
5
7
4
Fill every row, column and box with 1–9.
How to play: fill the grid so that every row, every column and each of the nine 3×3 boxes holds the digits 1 to 9 exactly once. Pick a cell, then a digit from the pad or the keyboard; the numbers printed at the start are fixed. Arrow keys walk the grid and Backspace clears a cell. Every puzzle has one solution and can be reasoned out to the end — no guessing is needed. Easy, Medium and Hard differ only in how many digits you are given to start, and each keeps its own best time.
Added 30 Jul 2026Updated 1 Aug 2026
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