The most difficult Sudoku puzzle
By ViragElvtars
@ViragElvtars (21)
Hungary
August 27, 2007 11:20am CST
Which is the most difficult sudoku puzzle you have ever seen?
This is a real hard one. There is only 1 field that can be solved with the known methods.
708000300000201000500000000040000026300080000000100090090600004000070500000000000
I made a sudoku solver software that can solve a puzzle with brute force algorithm (try a possible number, and if it fails, try an other one). My software has to try 168 times till it solves this puzzle. It' just a monent for the computer, but on paper it's an almost unsolvable puzzle.
Can somebody show a more difficult one?
1 person likes this
11 responses
@kwenge (2487)
• Kenya
4 Jun 08
Gosh! This is just hard to solve. I cant think of a more complex form of sudoku than this one. I have tried and tried and I could not do it.
Where did you get this one? Can I have the software to solve it? It is just complex and hard.
Thanks for sharing with us.
@gafoorabdul (4)
• India
27 Oct 08
Download sudoku solver ultimatum.. trust me it can solve any complex sudoku. check it out on http://gafoorabdul.spaces.live.com
@Shadowmaster (1)
•
12 Apr 13
Cool sudoku!!!
I haven`t seen such difficult sudoku yet.
I solve it for around 1,5 hour.
My answer:
728946315
934251678
516738249
147593826
369482157
852167493
293615784
481379562
675824931
@mhdnsd (1)
• United Arab Emirates
2 Dec 08
I m sorry to say this words Mr.Abdul Gafoor, that this sudoku is not much difficult ,i will send u another one ,,My id is mhd.nsd@gmail.com,, hope we will meet there..
i tried to down load ur youtube download software,but when i tried to install it shows this message" the application failed to initialize properly 0xc0000135
@mzhang19 (1)
• New Zealand
18 Apr 10
i have solved this so called "most difficult sudoku", in just over 20 minutes, BY HAND, i mean by my brain!!! Not by software what so ever, here is my answer:
7 4 1 9 8 6 2 3 5
6 5 2 7 3 1 9 8 4
9 8 3 5 2 4 6 1 7
5 9 8 1 4 2 7 6 3
3 7 4 6 9 5 8 2 1
1 2 6 3 7 8 4 5 9
8 3 7 2 5 9 1 4 6
4 1 5 8 6 7 3 9 2
2 6 9 4 1 3 5 7 8
I think this is not the most difficult sudoku. I have played much more complex than this one. anyways, thanks for the post.
@calvinfoo (1)
• Malaysia
29 Aug 10
Not difficult at all. Solved in 4:19.
741986235
652731984
983524617
598142763
374695821
126378459
837259146
415867392
269413578
@gafoorabdul (4)
• India
27 Oct 08
Hey, here is my effort to solve any complex sudoku, check it out on http://gafoorabdul.spaces.live.com/
@gafoorabdul (4)
• India
27 Oct 08
Hey, here is my effort to solve the complex sudoku. Check it out on http://gafoorabdul.spaces.live.com/
