Discussion...
Post an idea here...
... by: Don
Simplest Unsolvable Sudoku
1 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 0
0 0 0 0 0 0 1 0 0
0 1 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 1 0
0 0 1 0 0 0 0 0 0
0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 2
Many variations possible.
Don
... by: RICHARD ALLAN
Even using logic,I had to make about ten 1/2 guesses and the puzzle still took me about 3 hours to solve,what a stinker.The 6x6 puzzle yesterday was easy compared to this one.Once you found all the 5s,the problem was solved.
... by: Duder Sud
Use 7 in A6 then use solver
... by: Sarah
Yes it's funny how dilemmas similar to this one start looking unbelievably insignificant when compared to the world events. Another part of the cold-war, the actual authentic war that erupts, Russia-China fuel deal axis... Nonetheless here we are with your socialmedia dilemmas, - can we see the world has transformed? I'm not stating what you write about is unnecessary, I'm indicating that the certain degree of detachment is healthful. Thanks, Sarah @ http://phyto-renew350e.com/
Sarah
... by: jjflip
dude, your slover blows! its WAYYYYY to complicted. i tried another solver and it worked pretty quick
... by: Solved? Or Not..
Is this right?
[6, 2, 5, 1, 7, 8, 9, 4, 3]
[9, 4, 8, 3, 2, 6, 1, 5, 7]
[3, 7, 1, 9, 4, 5, 8, 6, 2]
[2, 5, 7, 6, 1, 9, 3, 8, 4]
[4, 6, 3, 5, 8, 7, 2, 9, 1]
[1, 8, 9, 4, 3, 2, 5, 7, 6]
[7, 9, 2, 8, 6, 3, 4, 1, 5]
[5, 1, 6, 2, 9, 4, 7, 3, 8]
[8, 3, 4, 7, 5, 1, 6, 2, 9]
Thanks!
... by: JULIEN
ok I did this Sudoku but there is a mistake and it is why it is impossible, the 9 in b1 should be at c2 therefore 7 c2 should be at b1. here the solution without the misplacement of this 2 number:
652-138-947
734-296-158
198-745-326
247-619-583
561-483-279
389-572-461
923-864-715
416-957-832
875-321-694
this is the one and only solution, the person who did invent this Sudoku put an error to be impossible...
but now with this 2 number put back at their right place now it is possible ( see result above).
it took me 4 hours but I find it.
roncq@hotmail.co.uk
... by: saskjals
dadadssada
... by: newby
first finding all the 3 number sets, (3,5,8)C7 was most interesting as it offered the most paired sets using 8C7.
The using pairs (2,9)J8,J9; (1,8)H9,G8; (4,7)G7, H7
9J9, 8H9, 7H7 solves!!
... by: Enes
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... by: marcel hendrix
This one takes 0.061 ms to solve. That is not much, compared to 2.5 ms for Arto Inkala's idea, or some samples from sudoku17.txt (326 ms for line 527, 989 ms for line 6361).
-marcel
... by: samuel
6 2 5 1 7 8 9 4 3
9 4 8 3 2 6 1 5 7
3 7 1 9 4 5 8 6 2
2 5 7 6 1 9 3 8 4
4 6 3 5 8 7 2 9 1
1 8 9 4 3 2 5 7 6
7 9 2 8 6 3 4 1 5
5 1 6 2 9 4 7 3 8
8 3 4 7 5 1 6 2 9
is that right?
... by: Strmckr
Jean-Claude Casari: answered via email.
a question for andrew if he reads this:
how come your solver never upgraded to include the
als-xy rule:
instead you are using mike barkers
Deathblosom which is also an als-xy rule but limited in its effectiveness through restrictions in its initial design.
... by: Jean-Claude
Very nice picture, strmckr, I have to buy colour pens to get there !
In order to let better understand your method, could you draw the equivalent picture for unsolvable # 27.
Many thanks,
Jean-Claude Casari
casarijc@hotmail.fr
... by: strmckr
ronk: posted a great pic of the logic set.
http://i41.tinypic.com/16kqmvd.jpg
after the BI BI pattern it solve using singles, 3 locked pairs 3 locked candidates and 1 skyscraper
I'm thinking the remote pairs is a bit excessive :P
... by: JC Van Hay
Typo in previous post (C1 -> C3). Thus :
2 very simple steps to solve the puzzle :
#1. Exocet pattern : see ttt's post in http://www.sudoku.org.uk/SudokuThread.asp?fid=4&sid=11320&p1=1&p2=17.
#2. Remote pairs : RP(35)C3B5 => +7r1c5; stte.
... by: JC Van Hay
2 very simple steps to solve the puzzle :
#1. Exocet pattern : see ttt's post in http://www.sudoku.org.uk/SudokuThread.asp?fid=4&sid=11320&p1=1&p2=17.
#2. Remote pairs : RP(35)C1B5 => +7r1c5; stte.
... by: Jean-Claude
I have no logical solution: there no bi-value cell.
Help !
... by: Nick the Geek
Wow! Immediate "Rooks!" (Run Out Of Known Strategies)! I'll give it a go today.