Please help with "diabolical" puzzle

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Please help with "diabolical" puzzle

Postby VegHeadMoby » Sun Jul 10, 2005 5:39 pm

I am having trouble solving this puzzle with logic....
Here is the original code...

8.3|.29|..6
..6|.18|5..
...|...|...
-----------
..5|.4.|.8.
7.9|...|6.2
.6.|.9.|1..
-----------
...|...|...
..1|65.|8..
5..|98.|4.3


And here is where I am stuck...

8.3|.29|716
..6|.18|5.4
...|.6.|..8
-----------
..5|.46|.8.
7.9|.35|642
.6.|.9.|1.5
-----------
6..|.7.|.51
..1|65.|8..
5..|981|463



Thanks for the help!

Em
VegHeadMoby
 
Posts: 11
Joined: 25 June 2005

Postby simes » Sun Jul 10, 2005 5:49 pm

I can't solve it with logic either - are you confident it doesn't require a little T&E?

Where did it come from?
Last edited by simes on Sun Dec 11, 2011 9:43 am, edited 1 time in total.
simes
 
Posts: 324
Joined: 11 March 2005
Location: UK

Postby george-no1 » Sun Jul 10, 2005 6:18 pm

This puzzle definitely does require trial and error, however it has a unique solution.

George:)
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Posts: 150
Joined: 20 May 2005

Re: Please help with "diabolical" puzzle

Postby Nick70 » Sun Jul 10, 2005 6:19 pm

VegHeadMoby wrote:And here is where I am stuck...
Code: Select all
8.3|.29|716
..6|.18|5.4
...|.6.|..8
-----------
..5|.46|.8.
7.9|.35|642
.6.|.9.|1.5
-----------
6..|.7.|.51
..1|65.|8..
5..|981|463


See where 7 can be in row 4. See what happens to (2,4) when you put 7 in either place in row 4.
Nick70
 
Posts: 156
Joined: 16 June 2005

Postby VegHeadMoby » Sun Jul 10, 2005 6:24 pm

simes wrote:I can't solve it with logic either - are you confident it doesn't require a little T&E?

Where did it come from?


I got it from the site www.sudoku.org.uk - no guarantee that it doesn't require trial and error but I assumed (probably a bad idea) that a site dedicated to sudoku and full of regular players and the like wouldn't publish puzzles that required T&E...

Anyway, thanks for the help:)


Em
VegHeadMoby
 
Posts: 11
Joined: 25 June 2005

Postby simes » Sun Jul 10, 2005 6:49 pm

Some of the puzzles from that site require T&E, or "bifurcation" as the author would prefer.
simes
 
Posts: 324
Joined: 11 March 2005
Location: UK


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