Puzzles come in all types, but when I see puzzles like this I have a hard time putting them down until I have solved them. I ran across a puzzle similar to this while caching in Erie, PA. I hope you enjoy this one as much as I did.
Each row and column must contain the numbers 1 thru 9. Your only clues are in the small rectangles within the grid. They indicate the sum of the digits they contain. To solve the puzzle the numbers in each row and column must total 45.
The puzzle has only one solution. If you correctly solve the puzzle, you will have the coords.
Final cache location:
N 39 39.ABC
W 79 59.DEF