Rules
Normal sudoku rules apply.
Orthogonally adjacent digits cannot sum to 5 or 10.
XY-Sums: clues outside the grid indicate the sum of the first X digits and last Y digits combined, where X is the first digit and Y is the last digit from that direction.
Solution code: Column 5
on 15. June 2026, 14:46 by Snookerfan
Very nice! A bit tricky to get started, but when the negative constraint shows its full power, it becomes very smooth. Thanks
on 15. June 2026, 08:04 by marcmees
looks intimidating at first but eventually solves supersmooth. Thanks
on 15. June 2026, 07:12 by BlackRaven
Very nice puzzle. Loved the logic.
| Difficulty: | ![]() |
| Rating: | 92 % |
| Solved: | 25 times |
| Observed: | 0 times |
| ID: | 000T9Z |