There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can participate in the path no more than once. What is the relation and the path it induces?

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  • $\begingroup$ dang, this is the fourth already? :000 $\endgroup$ – oAlt May 11 at 14:40
  • $\begingroup$ @oAlt Too soon? $\endgroup$ – Galen May 11 at 14:42
  • $\begingroup$ nope, all good :D $\endgroup$ – oAlt May 11 at 14:43

The path is as follows

enter image description here

And the relationship is

Adjacent numbers in the path differ by 1

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