This puzzle is a member of the Map of Victoria GeoArt. It has been placed to coincide with the Parkville Mega.
The rules are as follows:
1. You need to end up with the same number of noughts and crosses in each row, and each column – i.e. 6 noughts and 6 crosses.
2. You can't have more than two noughts or two crosses together, vertically or horizontally. (Diagonals don't matter).
There are six shaded areas, each with a corresponding letter from A to F. Once you've solved the puzzle, count the number of crosses in each area - this is the value of that letter.
The cache can be found at S 37° 46 . (A + D) B (F - C) E 144° 54 . (D - E) (E – A) (E – F)