Cache #4 is actually a puzzle cache. It is a sudoku puzzle. Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with numbers (1-9) so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid (also called "boxes", "blocks", "regions", or "sub-squares") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a unique solution. Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single number may not appear twice in the same row, column or in any of the nine 3×3 subregions of the 9x9 playing board. - Wikipedia
Please view the pictures below, one is the puzzle, and the other is how to solve the puzzle. I created this puzzle to have a puzzle cache where you spend the time solving the puzzle, whether than spending a ton of time figuring out what it means.
The solution is NAB° 00.CDE W FGG° 0H.IJK- Thank you BlakeFamily76 for reminding me to add this part.
It is 1.6 miles on the shortest route from the map location to the final location
*Bring your own pen/pencil*
Please sign next to the numbers on the log.
Congratulations to BlakeFamily76 for the FTF!
To open container, push down lid, and turn
I also would like to see/hear how you solved the puzzle in your log.
Also please say if you would like me to make another geocache similar to this one.

Cache is approximately 20-30 feet north of sudoku coordinates.
You can check your answers for this puzzle on

You can validate your puzzle solution with certitude.