Orthogonal neighbouring cells cannot contain consecutive digits.
Solution code: The main diagonals. First from top left to bottom right, then from top right to bottom left.
on 18. February 2023, 02:14 by Nick Smirnov
CtC-app:
https://tinyurl.com/465yuad7
on 27. November 2010, 15:23 by Saskia
Gern mehr!
on 26. November 2010, 13:40 by zhergan
Very nice:) Thanks Richard...
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