4-cell killer cage summing to 18
11 combinations.
- Always present
- No digit is forced into this cage.
- Never present
- Every digit can appear in this cage.
Valid digit combinations
- 1269
- 1278
- 1359
- 1368
- 1458
- 1467
- 2349
- 2358
- 2367
- 2457
- 3456
How to use this in play
11 digit sets sum to 18 across 4 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.