On-the-spot Insanity by Rik van Grol - 2003

I previously blogged about Rik’s foray into the ‘Insanity’ type puzzles and recently acquired this one that dates back to when I first started making puzzles in the early 2000’s.

This particular version has two solutions where no two symbols can be repeated on either side in a row or diagonal..not an easy task!

Rik was kind enough to include a ‘hint’ sheet..