Making "Rodoku"
In case you are interested, this is the actual solution to the puzzle.

I completed the Rodoku in July or August and was feeling pretty good. Obviously the hard part was done. Or was it? What exactly could go on the inside?
In case you are interested, this is the actual solution to the puzzle.

I completed the Rodoku in July or August and was feeling pretty good. Obviously the hard part was done. Or was it? What exactly could go on the inside?