Nick Drew reckons this Sudoku puzzle has two possible solutions, and that somewhere you can swap round 6's and 9's. The yellow squares are the numbers provided and the rest is my suggested solution. Can anybody work out which 6's and which 9's?
Tuesday 17 November 2009
Times Sudoku Number 2863
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11 comments:
humility corner ...
before anyone wastes an entire afternoon I need to weaken my claim
not 2 solutions to the puzzle as set; but a switcheroo possibility does indeed exist within the completed square, as per Mark's solution
(it was your yellow that highlighted this - in the original black-n-red I'd missed it)
the search continues
*creeps away furtively*
Yup, row 7 & 9, columns 3 & 7. Only two of the 6's were already in place (which I didn't notice until I'd coloured them yellow, to be fair).
actually I was looking at rows 2 & 5, cols 8 & 9 ! (and only one of these 4 numbers was already in place)
ND, right, I think we've both learned a valuable lesson: doing a Sudoku post is something you usually end up regretting, a bit like clicking "Reply all" on an email.
Head's spinning already.
I didn't read the comments first and went straight to times online for the original grid (not that I mistrust any sudoku gubbins on this blog).
Yes, I agree with the solution.
MTG, I did a Sudoko post recently on one I had messed up (without even realising I'd messed it up, for shame), so I'm heartily relieved that you did your own solution and came to the same one as I did.
all 6's and 9' can be switched around
Dear Anon @ 14:51
There is but one solution to this sudoku.
All numbers, including the 6's and 9's, are fixed by virtue of those given in the original grid.
MTG, maybe Anon meant you could turn it umop ap!sdn - that would swap all the 6's and 9's round.
No just better at Sudoku - at the moment! There are lots of ways of being 'smart' - there are people who are brilliant scientists but can't tie their own shoelaces, and superb sportsmen who can barely string two words together when they speak.
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