Want to save some trees? Try my Interactive Sudoku, an online version of these puzzles that works on your browser or iPad.
Krazydad Sudokus are also available in a daily puzzle (for print or online).
Here's a blank sudoku grid in case you need to start over.
Krazydad Ephemeral Sudoku is my new Sudoku Quarterly, available on Amazon.

The Daily Diagonal Sudoku. Come back every day for a fresh new Sudoku puzzle! Browse Variety Sections. Books Celebrities Eat & Drink Movies Music Stage & Arts. The Diagonal Sudoku Puzzles offer yet another challenging variation on the puzzle. In this game, the two diagonals must also have the digits from 1 to 9 represented just once. Finally, the Challenge Puzzles provide some miscellaneous challenging puzzles. The first group of puzzles have just 20 initial values.
Each title will be available for just three months, and then will fade away, like tears in rain.
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Diagonal Sudoku Printable
Diagonal Sudoku Solver
Diagonal Sudoku Washington Post
My printable puzzles contain a page of hints in addition to a page of answers.
Diagonal Sudoku Free
The hints are puzzle grids that contain numbers showing the order inwhich the squares were solved by my computer. Although this is not necessarily the orderyou would solve the puzzle, it's probably in the neighborhood.
Follow the numbered squares in order 1,2,3,4,5... until you find a square you haven'tsolved yet. This square (or the one or two immediately after it) isa good candidate to solve next.
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