Irregular 6×6 Sudoku
Digits 1–6, with jigsaw regions instead of boxes.
Also known as Jigsaw Sudoku, Nonomino Sudoku, Squiggly Sudoku.
How to play Irregular 6×6 Sudoku
- Fill every empty cell with a digit from 1 to 6.
- Each row and each column must contain all six digits exactly once.
- The outlined regions take the place of boxes: each holds six cells and all six digits, whatever its shape.
Where to start
Trust the heavy outlines over your eyes — a region can bend around its neighbour.
Difficulty
Puzzles are generated on your device, so there is an endless supply of them. Irregular 6×6 Sudoku comes in 3 grades — or work up the endless track, where every level is generated a little harder than the last.