Solution code: The prime number from the highlighted cells followed by the diagonal from the bottom left to the upper right corner.
on 5. August 2026, 16:36 by PrimeWeasel
hehe someone else looking at unsolved puzzles
on 5. August 2026, 16:03 by Jooshy
No solution if you take the rules at face value. However, there are solutions if you alter any of the rules slightly, perhaps the rules are ambiguous.
on 12. April 2023, 19:46 by DiMono
This puzzle is broken and has no solution.
on 10. April 2023, 19:07 by PrimeWeasel
There was some great logic in here, up to the point that there isn't any anymore, and then it's just broken. I actually thought I had a solution but had flipped 2 digits