I have recently discovered that there are in fact three different grids that solve this Sudoku puzzle. However only one of them will yield the correct coordinates. If Solution Checker states that your solution is incorrect then, try another grid.

The cache is NOT located at the posted co-ordinates.

You must solve the Sudoku puzzle (located in the Images file).

The numbers you need to put into the actual co-ordinates formula, are located in the correctly solved puzzle going

from left to right and top to bottom.

ie. the number in the first yellow cell is the first number that you put into the following:

N _ 0  _ _ . _ _ _ ,  W 11 _  0 _ . 0 _ _