Main diagonals' sums are fifty apart.
Cells a chess knight's move apart may not contain the same digit.
Cells in cages sum to the number in the corner of the cage.
Solve online:Sudokupad
Solution code: top row
on 2. April 2026, 11:59 by pjot
Oh this was a nice puzzle! I was stuck for a while before I remembered the knights move constraint.
on 2. April 2026, 03:00 by TheJRMY
Fifty apart? No, that can’t be right! Why, that would have to mean…oh, wow, that’s quite nice.
| Difficulty: | ![]() |
| Rating: | 91 % |
| Solved: | 39 times |
| Observed: | 0 times |
| ID: | 000S4Y |