Good Brain Exercise

As I get old(er) I hear it is god to exercise my brain in various problem solving modes. This game does that, and is also relaxing in its own way.
The fact that it does give hints when I want them, and doesnt charge for them is also appreciated, although I really try to first get them myself. I think skill in completing the puzzles improves with experience, as they seem to be getting easier.

good Ole Minesweep about Montezuma Puzzle