Theme: The patterned digits in this Tight Fit Sudoku set up an interesting logical solve.
Answer String: Enter the 3rd column from top-to-bottom, followed by a comma, followed by the 5th column from top-to-bottom. Type both digits of the two-digit numbers 10 and 11. (Note: for the tight fit cells, enter the top before the bottom as would be normal for the read order.)
Time Standard: TFSudoku Master = 4:45, Expert = 14:15, Novice = 47:30