I was going to post another 16 by 16 monster sudoku like I have for the last several Saturdays, but I changed my mind at the last minute. Instead, here's a devilishly difficult 9 by 9 sudoku.
The rules of sudoku: The puzzle board consists of a 9 by 9 grid, which is further divided up into nine 3 by 3 blocks. In each row, column, and 3x3 block, the numbers 1 through 9 each get written exactly once. The puzzle board generally starts with 18 to 30 of the cells in the grid already filled in. For those who need help, a short tutorial on how to solve sudoku puzzles can be found here.To solve this puzzle, I suggest first saving the GIF on your computer. Then print it out (or copy it onto some graph paper) and solve it in pencil (or in pen if you're feeling bold); or, if you don't feel like using paper, then solve it using a graphics editor such as Microsoft Paint.
If you solve this puzzle, post your solution in the comments.
Update: The solution is here.
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