4-cell Kakuro run summing to 21
11 combinations.
- Always present
- No digit is forced into this run.
- Never present
- Every digit can appear in this run.
Valid digit combinations
- 1389
- 1479
- 1569
- 1578
- 2379
- 2469
- 2478
- 2568
- 3459
- 3468
- 3567
How to use this in play
11 digit sets sum to 21 across 4 cells. The run on its own is permissive; its constraints become useful when intersected with the perpendicular runs at each of its cells.