Outdoor Sudoku Rules
5
8
3
6
1
- Solve: tap any square, click something that shows your number. Clear shots make solving easier and the final souvenir prettier.
- Get it right: the photo is confirmed and stays viewable anytime. The digit stays hidden till the end.
- Get it wrong: the square locks until you correctly fill a different one.
- Retake: anytime, but a wrong retake un-solves the square and locks it too, just like a fresh miss.
Why 42? Every Outdoor Sudoku needs a Hitchhiker's Guide.