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NoticeI am no longer posting new puzzles to this blog. For all of my Sudoku puzzles, old and new, please visit Sudoku in another section of this website. I will still create and offer new puzzles, in batches of a couple of hundred, once a week or so. Sudoku #37Category: Sudoku What's the minimum number of seed values needed for a Sudoku puzzle with a unique solution? I will go out on a limb and say that no fewer than 24 seed values are needed. I don't have a mathematical proof for my assertion, but my Sudoku program has now been running for almost one full day now looking for a puzzle with no more than 23 start values. And it still hasn't produced a puzzle. I'll let it run a little longer, but my gut tells me it won't find anything. Todays puzzle, like most that I post, has 24 starting values. Hans
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