For the easy and medium Sudokus on Facebook's "Web Sudoku" applicatoin, I'm almost always first, if not, then at least top 10.
A friend of mine was convinced I was cheating so I recorded myself solving a medium puzzle.
Yeah, there's only one puzzle per day, so I could've solved it first and then recorded myself with the solved one written down beside me or something. But I didn't, so believe what you wish.
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I Fail