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Are you sure that it's officially "correct"? Is it checking it against the final solution, or is it just checking for blatant errors (like two 8s in the same column)?
I'm not trying to be confrontational, I'm just confused because I'd always thought that sudoku puzzles only had one solution each. I worked my solution out using the original numbers, and it works, so I'm just curious to see what the final official solution is if it's different from the one I got.
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