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Sudoku2 fron fingerarts on iPad/Iphone

 
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agnar



Joined: 03 Apr 2012
Posts: 3

PostPosted: Tue Apr 03, 2012 8:05 am    Post subject: Sudoku2 fron fingerarts on iPad/Iphone Reply with quote

Is there anyone of out thar that have experienve with Sudoku2 from fingerarts on the iPad/iPhone.

I have used it for a while. While the user interface is quite nice, I find the expert-level some times too difficult. Some of them are easilly solved using a two-string kite, a fish, sky-scraper or an xy-wing. But others seems completely unsolvable. As a test, I have ran several of them through SudoCue, to help find a solution, but it it surrenders!

Are there anyone of you having experience solving them without guessing?

Agnar
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Pat



Joined: 23 Feb 2010
Posts: 165

PostPosted: Thu Apr 05, 2012 1:38 pm    Post subject: Reply with quote

agnar wrote:

    Sudoku2 from fingerarts
    on the iPad/iPhone
I have ran several of them through SudoCue, to help find a solution, but it surrenders


perhaps you can post an example
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agnar



Joined: 03 Apr 2012
Posts: 3

PostPosted: Mon Apr 09, 2012 7:22 pm    Post subject: Reply with quote

Here is an example:
Code:

. . 2|. . .|7 . .
. . 7|3 . .|. 1 4
. . .|. . 5|. . 8
-----+-----+-----
. . .|. . .|1 6 .
. . 1|. 7 .|3 . .
. . .|6 . .|. . 7
-----+-----+-----
1 . .|. . 4|8 . .
. 5 8|. . 6|2 . .
. 4 .|. 5 .|. . .


And here is SudoCue's solver log:



  1. Digit 4 is a hidden single for R8C8 in multiple houses
  2. Digit 4 is a hidden single for R6C7 in multiple houses
  3. Digit 7 is a hidden single for R3C4 in multiple houses
  4. Digit 7 is a hidden single for R9C6 in multiple houses
  5. Digit 7 is a hidden single for R7C8 in multiple houses
  6. Digit 5 is a hidden single for R7C9 in multiple houses
  7. Digit 7 is a hidden single for R8C1 in multiple houses
  8. Last instance of digit 7 in R4C2
  9. Digit 8 is a hidden single for R9C4 in multiple houses
  10. Hidden single in box 3 for digit 2
  11. Hidden single in row 9 for digit 1
  12. Hidden single in box 9 for digit 6
  13. Digit 6 is a hidden single for R1C9 in multiple houses
  14. Hidden single in box 3 for digit 3
  15. Digit 3 is a hidden single for R8C9 in multiple houses
  16. Box 9 has one empty cell for the final digit 9
  17. Digit 5 is a hidden single for R2C7 in multiple houses
  18. Column 7 has one empty cell for the final digit 9
  19. Digit 5 is a hidden single for R1C1 in multiple houses
  20. Hidden single in box 8 for digit 3
  21. Hidden single in box 8 for digit 2
  22. Digit 2 is a hidden single for R9C1 in multiple houses
  23. Row 9 has one empty cell for the final digit 3
  24. Box 1 only has candidates for digit 4 in row 3
  25. Solver surrenders
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Pat



Joined: 23 Feb 2010
Posts: 165

PostPosted: Tue Apr 10, 2012 8:35 am    Post subject: re: 7.3 Reply with quote

agnar wrote:

Here is an example:
    ..2...7....73...14.....5..8......16...1.7.3.....6....71....48...58..62...4..5....

    [ play ]

thanks
    way too tough for me,
    SuDoku Explainer rates it 7.3
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agnar



Joined: 03 Apr 2012
Posts: 3

PostPosted: Tue Apr 10, 2012 7:53 pm    Post subject: Reply with quote

The question is, is it really solvable. And if so, what's the trick?
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Pat



Joined: 23 Feb 2010
Posts: 165

PostPosted: Wed Apr 11, 2012 9:19 am    Post subject: Reply with quote

agnar wrote:
The question is, is it really solvable. And if so, what's the trick?

the experts will say yes it is solvable

they'll use "forcing chains" or "forcing nets"

( Nicolas Juillerat's SuDoku Explainer can show you a solution-path )
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