OK, Sudoku mavens....

SteveDallas · 12-16-2007, 08:06 PM

I'm stuck here. Can anyone see a move?

Code:

8 7 3  _ 6 2  _ _ 5
9 1 _  _ 7 _  _ 8 _
4 2 _  _ 9 _  _ _ 3

5 9 7  _ 2 _  4 1 6
2 4 1  6 5 9  8 3 7
3 6 8  _ 1 _  5 2 9

7 8 2  _ 4 _  3 _ 1
1 3 _  _ 8 _  _ 5 _
6 5 _  2 3 1  _ _ 8

classicman · 12-16-2007, 08:45 PM

I love a good sudoku, and have come across more than one that was unfinishable.
According to my cheater program it is finishable, but it still may require a guess which I don't like. As I'm sure you are aware, thats not supposed to happen.

post the original and I'll see what I can do.

TheMercenary · 12-16-2007, 08:50 PM

I ve been working on it but I don't see anything yet either.

monster · 12-16-2007, 08:53 PM

I'd like to see the original too

TheMercenary · 12-16-2007, 08:54 PM

Original should be the bold numbers.

monster · 12-16-2007, 09:12 PM

Quote:

Originally Posted by TheMercenary

Original should be the bold numbers.

that's an awful lot but maybe I'm not reading it right -the nold and not bold are not terribly distinct to me.

no matter. I really want to play Pirates (just watched Pirates of the carribean 3), so may pack it in in a minute

Razzmatazz13 · 12-16-2007, 08:55 PM

I'll be of no help...this is the only sudoku I've ever been able to complete...

http://xkcd.com/74/

classicman · 12-16-2007, 09:15 PM

I can't tell which are bold at all, guess I need a new monitor

monster · 12-16-2007, 09:15 PM

third row eighth column is 7

...because it can either be 6 or 7, if it's 6 then r3c3 is 5, r3c6 is 8, r3c4 is 1, r1c4 is 4, r1 c8 is 9 which leaves no possibility for r7c8 (6 or 9)

SteveDallas · 12-17-2007, 09:23 AM

Quote:

Originally Posted by monster

third row eighth column is 7

...because it can either be 6 or 7, if it's 6 then r3c3 is 5, r3c6 is 8, r3c4 is 1, r1c4 is 4, r1 c8 is 9 which leaves no possibility for r7c8 (6 or 9)

Very clever! I often just throw up my hands at this point.. it's too close to guessing. But my experience is once you're at this point, you usually only have to figure out one number and the rest of it will fall apart.

The original numbers are supposed to be bold. The difference doesn't show much though. Here is the original:

Code:

_ _ _  _ _ 2  _ _ 5
_ 1 _  _ 7 _  _ 8 _
4 _ _  _ 9 _  _ _ 3

5 _ _  _ _ _  4 _ _
2 _ _  6 _ _  _ _ 7
_ _ 8  _ 1 _  _ _ 9

7 _ _  _ 4 _  _ _ 1
_ 3 _  _ 8 _  _ 5 _
6 _ _  2 _ _  _ _ _

FYI this is from Numberz, a PalmOS Sudoku application. It is rated as "insane"--I usually do Expert, but they are right next to each other and I apparently clicked the wrong button this time!

barefoot serpent · 12-17-2007, 01:50 PM

I sat and looked at this one for about 10 min. before I finally hit the 'CHECK' -- it's rated IMPOSSIBLE (NFK!)

Chocolatl · 12-20-2007, 08:29 AM

I think this is the answer for your puzzle, barefoot...

3 4 6 * 9 8 1 * 7 5 2
8 5 1 * 2 6 7 * 4 9 3
7 9 2 * 5 3 4 * 8 6 1
*****************
2 8 9 * 3 1 6 * 5 4 7
6 3 5 * 4 7 9 * 1 2 8
1 7 4 * 8 2 5 * 9 3 6
*****************
5 6 3 * 7 4 8 * 2 1 9
9 1 7 * 6 5 2 * 3 8 4
4 2 8 * 1 9 3 * 6 7 5

barefoot serpent · 12-20-2007, 09:37 AM

Quote:

Originally Posted by Chocolatl

I think this is the answer for your puzzle, barefoot...

3 4 6 * 9 8 1 * 7 5 2
8 5 1 * 2 6 7 * 4 9 3
7 9 2 * 5 3 4 * 8 6 1
*****************
2 8 9 * 3 1 6 * 5 4 7
6 3 5 * 4 7 9 * 1 2 8
1 7 4 * 8 2 5 * 9 3 6
*****************
5 6 3 * 7 4 8 * 2 1 9
9 1 7 * 6 5 2 * 3 8 4
4 2 8 * 1 9 3 * 6 7 5

looks good to me!, but would be wrong according to the 'official' solution:

3 4 6 * 9 8 1 * 7 5 2
8 5 1 * 2 6 7 * 4 9 3
7 9 2 * 5 3 4 * 8 6 1
*****************
2 8 9 * 3 1 6 * 5 4 7
6 3 5 * 4 7 9 * 1 2 8
1 7 4 * 8 2 5 * 9 3 6
*****************
5 6 3 * 7 4 8 * 2 1 9
9 1 7 * 6 5 2 * 3 8 4
4 2 8 * 1 9 3 * 6 7 5

wolf · 12-19-2007, 11:33 PM

Quote:

Originally Posted by SteveDallas

FYI this is from Numberz, a PalmOS Sudoku application. It is rated as "insane"--I usually do Expert, but they are right next to each other and I apparently clicked the wrong button this time!

I've been using Astraware's Sudoku. You can download additional games from Astraware's site. They even have packs that are rated by difficulty level ... so if all you do are the most difficult ones (that's what I usually do) you can download just that kind rather than the full assortment. I think that the gameplay is a lot better on that version. I also have Sudokumaster, but I don't like the interface as much.

monster · 12-16-2007, 09:19 PM

baby steps

12-16-2007, 08:06 PM	#1
SteveDallas Your Bartender Join Date: Jan 2002 Location: Philly Burbs, PA Posts: 7,651	OK, Sudoku mavens.... I'm stuck here. Can anyone see a move? Code: 8 7 3 _ 6 2 _ _ 5 9 1 _ _ 7 _ _ 8 _ 4 2 _ _ 9 _ _ _ 3 5 9 7 _ 2 _ 4 1 6 2 4 1 6 5 9 8 3 7 3 6 8 _ 1 _ 5 2 9 7 8 2 _ 4 _ 3 _ 1 1 3 _ _ 8 _ _ 5 _ 6 5 _ 2 3 1 _ _ 8

12-16-2007, 08:45 PM	#2
classicman barely disguised asshole, keeper of all that is holy. Join Date: Nov 2007 Posts: 23,401	I love a good sudoku, and have come across more than one that was unfinishable. According to my cheater program it is finishable, but it still may require a guess which I don't like. As I'm sure you are aware, thats not supposed to happen. post the original and I'll see what I can do. __________________ "like strapping a pillow on a bull in a china shop" Bullitt Last edited by classicman; 12-16-2007 at 08:51 PM.

12-16-2007, 08:50 PM	#3
TheMercenary “Hypocrisy: prejudice with a halo” Join Date: Mar 2007 Location: Savannah, Georgia Posts: 21,393	I ve been working on it but I don't see anything yet either. __________________ Anyone but the this most fuked up President in History in 2012!

12-16-2007, 08:53 PM	#4
monster I hear them call the tide Join Date: Dec 2005 Location: Perpetual Chaos Posts: 30,852	I'd like to see the original too __________________ The most difficult thing is the decision to act, the rest is merely tenacity Amelia Earhart

12-16-2007, 08:54 PM	#5
TheMercenary “Hypocrisy: prejudice with a halo” Join Date: Mar 2007 Location: Savannah, Georgia Posts: 21,393	Original should be the bold numbers. __________________ Anyone but the this most fuked up President in History in 2012!

12-16-2007, 08:55 PM	#7
Razzmatazz13 Vicariously, I live... Join Date: Jun 2007 Location: USA Posts: 1,221	I'll be of no help...this is the only sudoku I've ever been able to complete... http://xkcd.com/74/ __________________ I have some people I need to have smoted. ~ SteveDallas

12-16-2007, 09:15 PM	#8
classicman barely disguised asshole, keeper of all that is holy. Join Date: Nov 2007 Posts: 23,401	I can't tell which are bold at all, guess I need a new monitor __________________ "like strapping a pillow on a bull in a china shop" Bullitt

12-17-2007, 01:50 PM	#11
barefoot serpent go ahead, abbrev. it Join Date: Jun 2005 Location: Lawrence, KS Posts: 2,623	I sat and looked at this one for about 10 min. before I finally hit the 'CHECK' -- it's rated IMPOSSIBLE (NFK!) Attached Images __________________ Chooses rowing vs. wading Last edited by barefoot serpent; 12-17-2007 at 01:56 PM. Reason: d'OH.... not the SOLVE!

12-20-2007, 08:29 AM	#12
Chocolatl Glutton for Gluttony Join Date: Oct 2007 Location: Tampa, FL Posts: 1,409	Solution to Puzzle in Post #16 I think this is the answer for your puzzle, barefoot... 3 4 6 * 9 8 1 * 7 5 2 8 5 1 * 2 6 7 * 4 9 3 7 9 2 * 5 3 4 * 8 6 1 ***************** 2 8 9 * 3 1 6 * 5 4 7 6 3 5 * 4 7 9 * 1 2 8 1 7 4 * 8 2 5 * 9 3 6 ***************** 5 6 3 * 7 4 8 * 2 1 9 9 1 7 * 6 5 2 * 3 8 4 4 2 8 * 1 9 3 * 6 7 5

12-16-2007, 09:19 PM	#15
monster I hear them call the tide Join Date: Dec 2005 Location: Perpetual Chaos Posts: 30,852	baby steps __________________ The most difficult thing is the decision to act, the rest is merely tenacity Amelia Earhart

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