I'm STUCK! Can't figure out where the squares are supposed to be filled in! I have the top portion and bottom portion on the puzzle filled in but the middle of the puzzle is a complete mystery! I can't figure out where to fill it in! Any help? Thanks!

The 3 in column 2 is in row 11-13 (counting from above). The 3 in col 25 is in row 12-14. When I had this I could work out the rest.

I couldn't have done it without your hints, Harpah. Thanks for the help! :)

I hope more of our wonderful puzzle creators start testing their puzzles before posting them, because this one is really cute and worth doing. (Using the hints, of course.)

Little bit of logical guessing to get it right :)

One unique solution. Thank you for the puzzle.