Express DC Hard -- Two solutions?

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Express DC Hard -- Two solutions?

Postby Zonkerbl » Mon Mar 03, 2008 3:53 pm

Wha?

Code: Select all
 *-------------------*
 |5 4 3 |6 8 2 |7 9 1|
 |7 6 9 |3 1 5 |4 8 2|
 |2 8 1 |4 9 7 |3 5 6|
 |------|------|-----|
 |6 9 5 |2 4 . |. 3 7|
 |4 2 4 |9 7 . |. 6 5|
 |1 7 8 |5 3 6 |2 4 9|
 |------|------|-----|
 |3 1 2 |8 6 9 |5 7 4|
 |9 4 7 |1 5 3 |6 2 8|
 |8 5 6 |7 2 4 |9 1 3|
 *-------------------*


I thought this one was pretty easy for a hard sudoku until I got to the end and realized the last four spots can be filled up with [1,8],[8,1] or [8,1],[1,8]

My attention to detail stinks, have I screwed up somewhere?
Zonkerbl
 
Posts: 7
Joined: 21 December 2007

Postby Pat » Mon Mar 03, 2008 4:56 pm

Zonkerbl wrote:
Code: Select all
 *-------------------*
 |5 4 3 |6 8 2 |7 9 1|
 |7 6 9 |3 1 5 |4 8 2|
 |2 8 1 |4 9 7 |3 5 6|
 |------|------|-----|
 |6 9 5 |2 4 . |. 3 7|
 |4 2 4 |9 7 . |. 6 5|
 |1 7 8 |5 3 6 |2 4 9|
 |------|------|-----|
 |3 1 2 |8 6 9 |5 7 4|
 |9 4 7 |1 5 3 |6 2 8|
 |8 5 6 |7 2 4 |9 1 3|
 *-------------------*



My attention to detail stinks, have I screwed up somewhere?



yes, e.g. i see you have no 3 in column 2 nor in box 4
User avatar
Pat
 
Posts: 3448
Joined: 18 July 2005

Postby Zonkerbl » Mon Mar 03, 2008 5:35 pm

Oops, two fours in column 2. Yes, that would be a problem. Sigh, let me start over...
Zonkerbl
 
Posts: 7
Joined: 21 December 2007


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