2 solutions to one puzzle

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2 solutions to one puzzle

Postby Yellowbelly » Wed Jun 08, 2005 6:21 pm

I've just run a Medium Game, and found there were two solutions to the puzzle. The game is 45828 with the following grid

453798216
879126534
126354798
931562847
768941325
542873961
6*5637*82
384215679
2*7689*53

The first missing numbers are 1 or 9, 2nd = 1 or 4, 3rd = 1 or 9 and 4th = 1 or 4

Could this be normal, as I though the system generated only games which had only one solution ??
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Postby Animator » Wed Jun 08, 2005 7:52 pm

Last time I checked the Pappocom software did not number games... so where did you get it from?
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Postby Yellowbelly » Wed Jun 08, 2005 8:07 pm

I took the number from the 1st 5 clues. I believe you can type these numbers in and get the solution. Hence my reason for including them
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Postby Animator » Wed Jun 08, 2005 8:13 pm

Nope, and that's also what the solutions page says:

Don't use this page for puzzles generated by the Sudoku program. The program knows the answer to any puzzle it makes up. It will show you the solution if you ask for it.


Also, your grid is incorrect.

Row 7 has the number 6 twice, Box 8 has the number 6 twice aswell...
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Postby Yellowbelly » Wed Jun 08, 2005 8:17 pm

SOrry that was a Typeing error. it should read 6*5437*82.

I am only using the numbers as a Ref, so if required the board can be checked. I did not use the number to generate a puzzle I left that up to the program.

The actual puzzle was generated at random.

I am just pointing out that there is a puzzle with two possible answers, and I was wondering if this should be true or not. If not true then is it a bug in the program (hence my quoting the number so people could find it)
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Postby Animator » Wed Jun 08, 2005 8:22 pm

Row 7 is missing the numbers 1 and 9, the number 9
cannot go in r7c7 because box 9 already has the number 9 in r8c9.
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Postby Yellowbelly » Wed Jun 08, 2005 8:29 pm

Your right I total missed that.

Sorry:(
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double solution

Postby spamoni » Sun Sep 18, 2005 3:44 pm

I think I just got a double solution Puzzle

958371264
327964851
641825793
492736518
163458972
875192346
789613425
236547189 or 536247189
514289637 or 214589637

whats up?
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Postby Karyobin » Sun Sep 18, 2005 5:35 pm

Nothing. Where'd you get it?
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Postby spamoni » Sun Sep 18, 2005 10:05 pm

Got this puzzle from today's Washington Post, my last 4 open spots were all either 5 or 2. I guess a "rule" has been broken.
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re: two answers?? (The Washington Post 2005.Sep.18)

Postby Pat » Mon Sep 19, 2005 8:14 am

.

spamoni wrote:I think I just got a double solution puzzle

Code: Select all
958371264
327964851
641825793
492736518
163458972
875192346
789613425
236547189 or 536247189
514289637 or 214589637




it would help if you could post the original puzzle
as given in The Washington Post
which we don't all have

.
User avatar
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Postby spamoni » Mon Sep 19, 2005 7:05 pm

Here is the original:

x5xxx12xx
x2x9xx8xx
6x1xxxxx3
4xxx3xxxx
x6xx5xx7x
xxxx9xxx6
7xxxxx4x5
xx6xx7x8x
xx48xxx3x
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Postby zebedeezbd » Mon Sep 19, 2005 7:10 pm

The left-hand "solution" you posted is not valid because you have replaced one of the original given numbers - the 8, fourth along on the bottom row - with a 2. The right-hand one is not valid because you have replaced it with a 5.
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Postby PaulIQ164 » Mon Sep 19, 2005 7:13 pm

That puzzle has one unique solution, but it isn't wither of the ones you posted above. My guess is that you made a copy of the puzzle, and accidentally moved the given 8 in the bottom row one space to the right, making a different puzzle that has lots of possible solutions.
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Postby Karyobin » Mon Sep 19, 2005 7:14 pm

You've got an '8' at r9c4 in that last post. In neither of your earlier offerings was this cell an 8. This leads to a misplaced '8' and '2' in the third row as well, in columns 4 and 5. That's yer problem.

[5 seconds later - Curses! Thwarted.]
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