For a change of pace, here's an alternate puzzle. Brainfreeze Puzzles recently released a book with 10 X 10 puzzles with pentomino blocks. Having seen test runs of such puzzles a couple of years prior to that, I decided to see what that style of puzzle would look like with overlapping regions in a standard 9 X 9 board. I created four such puzzles; this is the first.
The official rules:
- The digits 1, 2, 3, 4, and 5 appear in the above puzzle.
- Each shaded region contains exactly one of each of the digits 1 through 5.
- No row or column can contain more than two appearances of any of the digits 1, 2, 3, 4, 5.
- Squares with multiple colors contain a number that’s used in both of the associated adjacent regions.