Kropki
Sudoku with dots — white means ±1, black means ×2
0:00
0 moves
How to Play
1
Fill each cell with 1 to 4, unique per row and column.
2
A white dot = numbers differ by 1 (e.g. 3 and 4).
3
A black dot = one number is double the other (e.g. 2 and 4).
4
No dot = neither condition applies.