The cache is not at the posted coordinates. Please do the puzzle below to obtain the final coordinates. Thank you.

The FOUR Rules of CHESDOKU
1. Normal Sudoku rules apply: each row, column, and box of nine squares, can contain each number (1 to 9) only once.
2. The end cell, of a KNIGHT'S chess move, can’t contain the same digit.
KNIGHT’S
Move to a square that is two squares away horizontally and one square vertically, OR two squares vertically and one square horizontally. The complete move therefore looks like the letter “L”.

3. The end cell, of a KING'S chess move, can’t contain the same digit.
KING’S
The king moves exactly one square horizontally, vertically, or diagonally.

4. Any two ORTHOGONALLY ADJACENT cells,(share a common side), can’t contain consecutive digits.

To Obtain The Final Coordinates.
1. Fill in the CHESDOKU grid, using the 4 given rules.
2. Take the total sum of the top LEFT to bottom RIGHT, nine DIAGONAL NUMBERS, and the top RIGHT to bottom LEFT, nine DIAGONAL NUMBERS to get a 3 digit number, ABC.
3. Multiply ABC by 9 to get a 3 digit number, EFG.
4. Divide EFG by 1000 and ADD it to the posted North and West coordinates.
PLEASE NOTE
THIS CACHE WILL BE ARCHIVED ON JULY 16, 2023
