Place the digits 0…9 once each into every row, column and 2×2 box (highest digit per cell is given).
Cells in the same row/column/box must not contain the same number of digits (thus hold 1, 2, 3, and 4 digits).
A cell's value is the sum of the digits it contains. Values separated by… … an = are equal. … a white dot are consecutive. … a black dot are in a 1:2 ratio. … a digit are in a 1:digit ratio. … a V sum to 5. … an X sum to a multiple of 10.
Controls
Keyboard Alt + [Arrow key] to navigate, e.g. 0…9 to edit pencil marks.