Beautiful! I have one on my "To make" list for my husband, too. We both love the puzzles, but I have other ideas for quilts of my own!!! I am going to buy 9 different prints and assign a number to each. Then I'll use one of the hundreds of puzzles he's done for the layout. I do have a book about soduko quilts somewhere, but can probably work it out without the book.
Again, yours is very nice and you should be proud of it.