Calcudoku puzzle forumhttps://www.calcudoku.org/forum/ today's difficult Killer Sudoku has more than one solutionhttps://www.calcudoku.org/forum/viewtopic.php?f=19&t=299 Page 1 of 1

 Author: pnm  [ Sat Aug 18, 2012 12:05 pm ] Post subject: today's difficult Killer Sudoku has more than one solution Unfortunately it appears that today's 9x9 difficult has morethan one solution Just so people don't get stuck on the "wrong" solution:the one that's stored in the database has an 8 on c1,a 6 on f1, and a 2 on i8.I'll try to fix this ASAP..Patrick

 Author: fzpowerman47  [ Sat Aug 18, 2012 4:19 pm ] Post subject: Re: Extra puzzles why this solution is not correct for extra difficult puzzle of 18 august 2012?518796423936482157742153986259674318681935274374821695123568749495317862867249531there is more one solution ??

 Author: pnm  [ Sat Aug 18, 2012 4:48 pm ] Post subject: Re: Extra puzzles fzpowerman47 wrote:why this solution is not correct for extra difficult puzzle of 18 august 2012?518796423936482157742153986259674318681935274374821695123568749495317862867249531there is more one solution ??You mean the killer sudoku (not today's extra puzzle)?I sent you e-mail about this as soon as your solution came in (about 1 hour and 40 minutes ago).I also put a message on the page itself: http://www.calcudoku.org/killersudoku/en/2012-08-18/9/3and posted about the problem earlier: viewtopic.php?f=19&t=299Patrick

 Author: pharosian  [ Sat Aug 18, 2012 9:00 pm ] Post subject: Re: today's difficult Killer Sudoku has more than one soluti pnm wrote:Unfortunately it appears that today's 9x9 difficult has morethan one solution Just so people don't get stuck on the "wrong" solution:the one that's stored in the database has an 8 on c1,a 6 on f1, and a 2 on i8.I'll try to fix this ASAP..PatrickI struggled with this one earlier today before giving up for a while to do something else. On reading this thread, I put the values stated above into my grid (I already had the 2 and knew f1 was either 6 or 8) and quickly finished it... but I got the ERROR message, saying my solution was incorrect. Comparing my solution to fzpowerman47's, I see we got the same solution.Part of the reason I struggled earlier is that I saw that the pairs at a5-b5 and a9-b9 appeared to be 6 and 8, signaling a non-unique solution. So I tried to find a different way around it without success. The values at c1, f1, and i8 don't help to resolve the deadlock at a-b5 and ab-9.Glad to know I wasn't delusional when I thought there was something wrong with this one!

 Author: pnm  [ Sat Aug 18, 2012 10:50 pm ] Post subject: Re: today's difficult Killer Sudoku has more than one soluti pharosian wrote:Part of the reason I struggled earlier is that I saw that the pairs at a5-b5 and a9-b9 appeared to be 6 and 8, signaling a non-unique solution. So I tried to find a different way around it without success. The values at c1, f1, and i8 don't help to resolve the deadlock at a-b5 and ab-9.I just gave a few values in the "cycles" that I saw.The last two rows:495317862867249531In any case, I sent the database solution to anyone who submitted a solution(I get a warning message here when a supposedly incorrect solution issubmitted for a puzzle).Now I've got about an hour to fix the problem, or I'll probably have toremove tomorrow's Killer Sudokus just in case.. :(Patrick

 Author: pharosian  [ Sat Aug 18, 2012 11:29 pm ] Post subject: Re: today's difficult Killer Sudoku has more than one soluti Thanks for sending the solution, Patrick!It turns out the correct solution actually has a 6 at c1 and an 8 at f1, not the other way around.

 Author: pnm  [ Sun Aug 19, 2012 12:06 am ] Post subject: Re: today's difficult Killer Sudoku has more than one soluti pharosian wrote:It turns out the correct solution actually has a 6 at c1 and an 8 at f1, not the other way around. Ah...Today's (19th) also had more than one solution (three in fact), so I removed it to avoid the same issue.Patrick

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