Rules: The diagram depicts the map of a camping ground. A number on the left or top edge of the diagram indicates the number of tents in the corresponding row resp. column. Each tent is adjacent to at least one tree; tents are neither orthogonally nor diagonally adjacent.
Locate all the cells with tents in the diagram and do the sum of all the numbers using the provided grid (showing the numbers from 1 to 100).
Sum = F
The cachebox is hidden at N 49° 40.(F - 560) - E 006° 09.(F - 780)
[the coordinates you found are some 15 m off , for more accurate ones: N +2 / E+11; don't use these for the checker!!! ]