How do I use drag and drop?
Irregular Sudoku, Irregular Sudoku X, and Extra Region Sudoku let you define custom groups. The grid starts with a default grouping shown by cell colors.
To change the groups:
- Press and hold a cell until it lifts.
- Drag it to another cell to swap them.
- Arrange the cells into the groups your puzzle has.
On touch devices, tap a cell to open the keyboard. Press and hold to start dragging. To move the page, swipe outside the grid.
Once the groups match your puzzle, enter the numbers by hand, scan, or upload an image, then press Solve.