I love Sudoku, but this one has me stumped. I have lost face. Usually I can get ONE number, however, as you can see by my notations, there isn't a single number I can say definitively belongs in its space. The closest is the 3-9 option in the lower right and the circled ones are the ones that I absolutely know belong in one of those spaces, I just don't know which stinkin' space. Frustrating, I know. It's Frustrating Fridays!