The cache is not at the posted coordinates but is less than 2 miles away
Mrs. TNS 
likes to solve Sudoku puzzles to pass the time while riding in the car. Based on the number of times she exclaimed “Boy, this one is hard” I knew this would make a good geocaching puzzle 
.
This puzzle is same as a normal Sudoku puzzle in that every row and column must contain the numbers 1 through 9.
In standard Sudoku, the boxes are 3 x 3 but in this Sudoku puzzle the boxes are irregular shapes and each shape must contain the numbers 1 through 9. This type of puzzle is called a Jigsaw or an Irregular Sudoku.
There is room for very small trade items and GC's. Don't forget to bring your pen.
Enjoy!
The cache is located at N37 2A.BCD W121 5E.FGH
You can validate your puzzle solution with Certitude.
Congratulations to lmt000 on FTS and lel_h on FTF.