5-cell killer cage summing to 21
8 combinations.
- Always present
- No digit is forced into this cage.
- Never present
- Every digit can appear in this cage.
Valid digit combinations
- 12369
- 12378
- 12459
- 12468
- 12567
- 13458
- 13467
- 23457
How to use this in play
8 digit sets sum to 21 across 5 cells. Without other constraints this cage is loose; the value comes from pairing it with the cage's row, column, or box context — every digit ruled out elsewhere narrows which combinations remain.