This cache associated with this puzzle was hidden about halfway along my commute route. Alas, it was “muggled” frequently, and I had to archive it. (In geocaching parlance, a ‘muggle’ is a non-geocacher. If a geocache has been muggled, it was removed by the non-geocacher.)
The puzzle is called a “killer sudoku“. All standard sudoku rules apply. In addition:
- Each distinct colored region is a “cage”. The sum of the numbers in a particular cage must equal the number printed in that cage.
- No number may be repeated within a cage.
- Note that cages may extend across more than one 3×3 square. For example, there is a four cell cage, colored yellow with a sum of thirteen, that starts in the upper left and continues in the upper center 3×3.
(Click on the image for a larger version.)