The Hadoku Rules (continued)
| 1 | 2 | 3 | 1 | |||||
| 2 | 3 | 1 | 2 | |||||
| 4 | 1 | 5 | 1 | |||||
| 1 | 6 | 7 | 3 | |||||
Cells with a 1 must have one or more cells in between. Cells with a 3 must have three cells in between, cells with a 4 must have four cells in between and so on.
The rest is like Sudoku: fill each area with numbers from 1 to the size of the area. No number can be twice in the same area.
We only publish puzzles with a single solution. Some advanced solution techniques make use of this.
Learn how to play or look at all solution techniques or try our detailed walk-throughs:
Walk-through of a medium hard puzzle