The following tables list the possible combinations for various sums for Killer Sudoku 8x8.
I have also bundled all the Killer Sudoku cage total tables in a handy reference guide "Killer Sudoku - Cage Total Tables".
The book lists the cage total tables for Killer Sudoku 6x6, 8x8, 9x9, 10x10 and 12x12.
| 6: | 1,2,3 |
| 7: | 1,2,4 |
| 8: | 1,2,5 1,3,4 |
| 9: | 1,2,6 1,3,5 2,3,4 |
| 10: | 1,2,7 1,3,6 1,4,5 2,3,5 |
| 11: | 1,2,8 1,3,7 1,4,6 2,3,6 2,4,5 |
| 12: | 1,3,8 1,4,7 1,5,6 2,3,7 2,4,6 3,4,5 |
| 13: | 1,4,8 1,5,7 2,3,8 2,4,7 2,5,6 3,4,6 |
| 14: | 1,5,8 1,6,7 2,4,8 2,5,7 3,4,7 3,5,6 |
| 15: | 1,6,8 2,5,8 2,6,7 3,4,8 3,5,7 4,5,6 |
| 16: | 1,7,8 2,6,8 3,5,8 3,6,7 4,5,7 |
| 17: | 2,7,8 3,6,8 4,5,8 4,6,7 |
| 18: | 3,7,8 4,6,8 5,6,7 |
| 19: | 4,7,8 5,6,8 |
| 20: | 5,7,8 |
| 21: | 6,7,8 |
| 10: | 1,2,3,4 |
| 11: | 1,2,3,5 |
| 12: | 1,2,3,6 1,2,4,5 |
| 13: | 1,2,3,7 1,2,4,6 1,3,4,5 |
| 14: | 1,2,3,8 1,2,4,7 1,2,5,6 1,3,4,6 2,3,4,5 |
| 15: | 1,2,4,8 1,2,5,7 1,3,4,7 1,3,5,6 2,3,4,6 |
| 16: | 1,2,5,8 1,2,6,7 1,3,4,8 1,3,5,7 1,4,5,6 2,3,4,7
2,3,5,6 |
| 17: | 1,2,6,8 1,3,5,8 1,3,6,7 1,4,5,7 2,3,4,8 2,3,5,7
2,4,5,6 |
| 18: | 1,2,7,8 1,3,6,8 1,4,5,8 1,4,6,7 2,3,5,8 2,3,6,7
2,4,5,7 3,4,5,6 |
| 19: | 1,3,7,8 1,4,6,8 1,5,6,7 2,3,6,8 2,4,5,8 2,4,6,7
3,4,5,7 |
| 20: | 1,4,7,8 1,5,6,8 2,3,7,8 2,4,6,8 2,5,6,7 3,4,5,8
3,4,6,7 |
| 21: | 1,5,7,8 2,4,7,8 2,5,6,8 3,4,6,8 3,5,6,7 |
| 22: | 1,6,7,8 2,5,7,8 3,4,7,8 3,5,6,8 4,5,6,7 |
| 23: | 2,6,7,8 3,5,7,8 4,5,6,8 |
| 24: | 3,6,7,8 4,5,7,8 |
| 25: | 4,6,7,8 |
| 26: | 5,6,7,8 |
| 15: | 1,2,3,4,5 |
| 16: | 1,2,3,4,6 |
| 17: | 1,2,3,4,7 1,2,3,5,6 |
| 18: | 1,2,3,4,8 1,2,3,5,7 1,2,4,5,6 |
| 19: | 1,2,3,5,8 1,2,3,6,7 1,2,4,5,7 1,3,4,5,6 |
| 20: | 1,2,3,6,8 1,2,4,5,8 1,2,4,6,7 1,3,4,5,7 2,3,4,5,6 |
| 21: | 1,2,3,7,8 1,2,4,6,8 1,2,5,6,7 1,3,4,5,8 1,3,4,6,7
2,3,4,5,7 |
| 22: | 1,2,4,7,8 1,2,5,6,8 1,3,4,6,8 1,3,5,6,7 2,3,4,5,8
2,3,4,6,7 |
| 23: | 1,2,5,7,8 1,3,4,7,8 1,3,5,6,8 1,4,5,6,7 2,3,4,6,8
2,3,5,6,7 |
| 24: | 1,2,6,7,8 1,3,5,7,8 1,4,5,6,8 2,3,4,7,8 2,3,5,6,8
2,4,5,6,7 |
| 25: | 1,3,6,7,8 1,4,5,7,8 2,3,5,7,8 2,4,5,6,8 3,4,5,6,7 |
| 26: | 1,4,6,7,8 2,3,6,7,8 2,4,5,7,8 3,4,5,6,8 |
| 27: | 1,5,6,7,8 2,4,6,7,8 3,4,5,7,8 |
| 28: | 2,5,6,7,8 3,4,6,7,8 |
| 29: | 3,5,6,7,8 |
| 30: | 4,5,6,7,8 |
| 21: | 1,2,3,4,5,6 |
| 22: | 1,2,3,4,5,7 |
| 23: | 1,2,3,4,5,8 1,2,3,4,6,7 |
| 24: | 1,2,3,4,6,8 1,2,3,5,6,7 |
| 25: | 1,2,3,4,7,8 1,2,3,5,6,8 1,2,4,5,6,7 |
| 26: | 1,2,3,5,7,8 1,2,4,5,6,8 1,3,4,5,6,7 |
| 27: | 1,2,3,6,7,8 1,2,4,5,7,8 1,3,4,5,6,8 2,3,4,5,6,7 |
| 28: | 1,2,4,6,7,8 1,3,4,5,7,8 2,3,4,5,6,8 |
| 29: | 1,2,5,6,7,8 1,3,4,6,7,8 2,3,4,5,7,8 |
| 30: | 1,3,5,6,7,8 2,3,4,6,7,8 |
| 31: | 1,4,5,6,7,8 2,3,5,6,7,8 |
| 32: | 2,4,5,6,7,8 |
| 33: | 3,4,5,6,7,8 |