Checking solutions

Everything about Sudoku that doesn't fit in one of the other sections

Checking solutions

Postby Bernard Stay » Mon Apr 04, 2005 8:00 am

I am often pressed for time and after rushing through eg a Times puzzle and before emailing I want to be sure I've not blundered. Has anyone thoughts on the minimum checks that have to be done to be sure that the solution is unique and correct?

What I do is make sure that all the numbers 1 - 9 appear in each row and column. Is that enough? I could also check that all 9 numbers appear in each cell as well? Is that enough?

Clearly I can't wait until the solution is posted because it is then too late to email mine.
Bernard Stay
Posts: 94
Joined: 22 March 2005

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