3-cell killer cage summing to 6
Single combination — fully locked1 combination.
- Always present
- 123
- Never present
- 456789
Valid digit combinations
- 123
How to use this in play
A 3-cell killer cage of 6 is fully locked: the only way to make 6 from 3 distinct digits is {1, 2, 3}. Whatever order they sit in, those digits are the cage's contents — every one of them eliminates from every cell of the cage's row, column, and box that lies outside the cage.
Locked digits: 1, 2, 3. Whichever combination is in play, these digits sit somewhere inside the cage — meaning the cage's shared row, column, and box can't have any of them anywhere outside the cage.