Similar to the famous sudoku, you have to fill the grid with numbers.
-Each columns must contain exactly one of each digit
-Each rows must contain exactly one of each digit
-Each regions (groups of cell within a bold outline) must contains the digit needed to answer the question at the top left of the region
Grid size vary from 4x4 to 9x9 (zooming available)
Can choose the operation available
Can hide the operators to increase difficulty (very difficult)
Good luck and feel free to suggest improvements while rating the app!
WinDoku is an unofficial app and is not associated with Nextoy or the KenKen brand in any way.