Sudokus with an original rare shape

Everything about Sudoku that doesn't fit in one of the other sections

two hooves

Postby claudiarabia » Thu May 03, 2007 10:09 pm

Code: Select all
. 4 3 . . . . . .
9 . . 1 . . 4 . .
8 . . . 5 . . 3 .
. 6 . 8 . . . . .
. . 5 . . . 7 . .
. . . . . 4 . 2 .
. 2 . . 7 . . . 6
. . 1 . . 6 . . 5
. . . . . . 9 8 .

This one has ER rating 7-5. At first I thought because of one Nishio chain. But it was an Aligned Triplet Exclusion, what boosted the rating.
claudiarabia
 
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Re: two hooves

Postby m_b_metcalf » Fri May 04, 2007 1:22 am

claudiarabia wrote:This one has ER rating 7-5.

Dear Claudia,

Here's another for your enjoyment:
Code: Select all
 . 4 3 . . . . . .
 9 . . 1 . . 4 . .
 8 . . . 5 . . 3 .
 . 6 . 8 . . . . .
 . . 5 . . . 7 . .
 . . . . . 4 . 2 .
 . 3 . . 7 . . . 6
 . . 1 . . 2 . . 5
 . . . . . . 9 8 .    SE 8.4

Regards,

Mike Metcalf
User avatar
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Re: two hooves

Postby Mauricio » Fri May 04, 2007 1:44 am

claudiarabia wrote:This one has ER rating 7-5.


I have access again to a computer, so I can contribute sudokus again:
Code: Select all
. 1 2 . . . . . .
3 . . 8 . . 5 . .
4 . . . 5 . . 7 .
. 5 . 3 . . . . .
. . 7 . . . 8 . .
. . . . . 2 . 6 .
. 2 . . 7 . . . 8
. . 9 . . 4 . . 2
. . . . . . 6 4 .               ER 9.1
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Re: two hooves

Postby m_b_metcalf » Fri May 04, 2007 2:02 pm

Mauricio wrote:I have access again to a computer, so I can contribute sudokus again:

Yes, it's a fruitful pattern. Here are two more of note:

Code: Select all
 . 4 9 . . . . . .
 1 . . 7 . . 8 . .
 5 . . . 2 . . 6 .
 . 2 . 4 . . . . .
 . . 8 . . . 5 . .
 . . . . . 3 . 9 .
 . 3 . . 9 . . . 7
 . . 6 . . 5 . . 1
 . . . . . . 2 4 .    SE 8.9

Note here the 1-4, 5-9, 2-7 and 6-6 symmetrical patterns.
Code: Select all
 . 2 1 . . . . . .
 9 . . 5 . . 6 . .
 3 . . . 4 . . 8 .
 . 4 . 3 . . . . .
 . . 8 . . . 9 . .
 . . . . . 7 . 2 .
 . 6 . . 8 . . . 4
 . . 5 . . 2 . . 3
 . . . . . . 1 7 .    SE 9.1

Regards,

Mike Metcalf
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The Doll

Postby Ocean » Fri May 04, 2007 5:56 pm

The Doll:
Code: Select all
 . . . 1 . 2 . . .
 . . 3 . . . 4 . .
 . . 5 . . . 6 . .
 . . . 7 . 6 . . .
 . . . . . . . . .
 1 . 4 . . . 3 . 8
 . . 6 . . . 9 . .
 . 3 . . . . . 7 .
 8 . . 4 . 5 . . 1
Ocean
 
Posts: 442
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Postby JPF » Fri May 04, 2007 7:06 pm

Somebody :

Code: Select all
 . . . 1 . 2 . . .
 . . 3 . . . 4 . .
 . . 5 . . . 6 . .
 . . . 7 . 3 . . .
 . . . 2 . 5 . . .
 . . 6 . . . 8 . .
 . 7 . . . . . 9 .
 . 2 . . . . . 5 .
 . 8 . . 5 . . 3 .

SE=7.1

JPF
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An alteration of JPFs somebody.

Postby claudiarabia » Sat May 05, 2007 1:12 pm

JPF wrote:Somebody :
Code: Select all
 . . . 1 . 2 . . .
 . . 3 . . . 4 . .
 . . 5 . . . 6 . .
 . . . 7 . 3 . . .
 . . . 2 . 5 . . .
 . . 6 . . . 8 . .
 . 7 . . . . . 9 .
 . 2 . . . . . 5 .
 . 8 . . 5 . . 3 .
SE=7.1JPF

Code: Select all
. . . 1 . 2 . . .
. . 3 . . . 4 . .
. . 5 . . . 6 . .
. . . 7 . 3 . . .
. . . 2 . 5 . . .
. . 4 . . . 8 . .
. 7 . . . . . 9 .
. 2 . . . . . 5 .
. 8 . . 6 . . 3 .
SE=2.0

A nice pattern. Very easy on the eyes. It reminds me of the play-figures in: Man, don't get angry. With some sudoku you can say this too.
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Posts: 288
Joined: 14 May 2006

Postby ravel » Sat May 05, 2007 4:52 pm

JPF wrote:
Code: Select all
 . . . 1 . 2 . . .
 . . 3 . . . 4 . .
 . . 5 . . . 6 . .
 . . . 7 . 3 . . .
 . . . 2 . 5 . . .
 . . 6 . . . 8 . .
 . 7 . . . . . 9 .
 . 2 . . . . . 5 .
 . 8 . . 5 . . 3 .
SE=7.1
For my taste the rating is too high.
Code: Select all
 *-----------------------------------------------------------*
 | 49    6     7     | 1     349   2     | 35    8     359   |
 | 8     19    3     | 5     79    6     | 4     17    2     |
 | 2     149   5     | 8    #3479 #49    | 6     17    39    |
 |-------------------+-------------------+-------------------|
 | 49    459   2     | 7     8     3     | 59    6     1     |
 | 1     39    8     | 2     6     5     | 39    4     7     |
 | 7     35    6     | 4    #19   #19    | 8     2     35    |
 |-------------------+-------------------+-------------------|
 | 5     7     4     | 3     2     8     | 1     9     6     |
 | 3     2     9     | 6    #14   #14    | 7     5     8     |
 | 6     8     1     | 9     5     7     | 2     3     4     |
 *-----------------------------------------------------------*

Because of the marked unique loop you can eliminate 49 from r3c5, what gives you an xy-wing to eliminate 9 in r3c6 too. Thats all.
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Postby JPF » Sat May 05, 2007 7:40 pm

ravel wrote:For my taste the rating is too high.
claudiarabia wrote: ... Man, don't get angry...

Well, it's a bit off topic but here are some more :
Code: Select all
 . . . 1 . 2 . . .
 . . 3 . . . 2 . .
 . . 4 . . . 5 . .
 . . . 6 . 7 . . .
 . . . 8 . 1 . . .
 . . 6 . . . 4 . .
 . 8 . . . . . 6 .
 . 1 . . . . . 7 .
 . 2 . . 5 . . 9 .

SE=8.3

Code: Select all
 . . . 1 . 2 . . .
 . . 3 . . . 4 . .
 . . 5 . . . 6 . .
 . . . 7 . 4 . . .
 . . . 5 . 1 . . .
 . . 8 . . . 3 . .
 . 9 . . . . . 5 .
 . 1 . . . . . 7 .
 . 7 . . 4 . . 2 .

SE=7.2

JPF
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Postby Ocean » Sat May 05, 2007 9:20 pm

Flying:
Code: Select all
 1 . . . . . . . 2
 3 . . . 4 . . . 5
 . . . 6 . 5 . . .
 7 . . . . . . . 4
 . . . 8 7 1 . . .
 . 8 . . . . . 2 .
 . . 3 . 5 . 7 . .
 . . 1 3 . 9 8 . .
 . . . . . . . . .
# One XY-wing

Code: Select all
 1 . . . . . . . 2
 . . . 1 . 3 . . .
 . . 2 . . . 4 . .
 . . 1 . . . 2 . .
 . . . 5 6 7 . . .
 . . 6 . 4 . 5 . .
 . 7 . . . . . 4 .
 8 9 . . . . . 3 7
 . . . . 9 . . . .
# Two XY-wings
Ocean
 
Posts: 442
Joined: 29 August 2005

Postby daj95376 » Sun May 06, 2007 1:10 am

ravel wrote:For my taste the rating is too high.
Code: Select all
 *-----------------------------------------------------------*
 | 49    6     7     | 1     349   2     | 35    8     359   |
 | 8     19    3     | 5     79    6     | 4     17    2     |
 | 2     149   5     | 8    #3479 #49    | 6     17    39    |
 |-------------------+-------------------+-------------------|
 | 49    459   2     | 7     8     3     | 59    6     1     |
 | 1     39    8     | 2     6     5     | 39    4     7     |
 | 7     35    6     | 4    #19   #19    | 8     2     35    |
 |-------------------+-------------------+-------------------|
 | 5     7     4     | 3     2     8     | 1     9     6     |
 | 3     2     9     | 6    #14   #14    | 7     5     8     |
 | 6     8     1     | 9     5     7     | 2     3     4     |
 *-----------------------------------------------------------*

Because of the marked unique loop you can eliminate 49 from r3c5, what gives you an xy-wing to eliminate 9 in r3c6 too. Thats all.

How about an XY-Chain followed by Singles?

Code: Select all
 ^--------------------------------------------------------------------^
 | a49     6      7     |  1      39-4   2     |  35     8      359   |
 |  8     b19     3     |  5     d79     6     |  4     c17     2     |
 |  2      149    5     |  8      3479   49    |  6      17     39    |
 |----------------------+----------------------+----------------------|
 |  49     459    2     |  7      8      3     |  59     6      1     |
 |  1      39     8     |  2      6      5     |  39     4      7     |
 |  7      35     6     |  4     e19     19    |  8      2      35    |
 |----------------------+----------------------+----------------------|
 |  5      7      4     |  3      2      8     |  1      9      6     |
 |  3      2      9     |  6     f14     14    |  7      5      8     |
 |  6      8      1     |  9      5      7     |  2      3      4     |
 ^--------------------------------------------------------------------^
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Postby Ocean » Sun May 06, 2007 6:11 am

Heart:
Code: Select all
 .........
 ..1...2..
 3..4.5..6
 .........
 2...7...3
 68.....47
 .15.2.79.
 ..4...1..
 ....9....
Ocean
 
Posts: 442
Joined: 29 August 2005

Postby JPF » Sun May 06, 2007 4:14 pm

Nice heart Ocean .
There is a collection of hearts here too.

Here is an other UFO :
Code: Select all
 . . 1 . . . 2 . .
 . 3 . . . . . 4 .
 5 . . . . . . . 6
 6 . . . . . . . 5
 4 . . . . . . . 7
 . 5 . . 8 . . 3 .
 . . 2 . 3 . 6 . .
 . . 9 6 . 4 8 . .
 . . . . . . . . .
without any wing...

JPF
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Some diagonal stuff

Postby claudiarabia » Tue May 08, 2007 7:10 pm

Code: Select all
1 . . . . 3 . . 7
. . . 5 . . 8 . .
. 4 . . 6 . . . .
5 . . . . 4 . 6 .
. . 8 . . . 5 . .
. 9 . 1 . . . . 2
. . . . 2 . . 4 .
. . 3 . . 9 . . .
7 . . 8 . . . . 1


SE 9.0
claudiarabia
 
Posts: 288
Joined: 14 May 2006

Postby Ocean » Tue May 08, 2007 10:16 pm

JPF wrote:There is a collection of hearts here too.

Here is an other UFO :
JPF

Thanks for pointing to the hearts colletion.

Your UFO and Somebody designs have very pleasant looks.

I also enjoy many of your designs, Claudia. Nice thread, with lots of creativity and originality.

My own drawings are still too rough, but will try to learn. (Have been focused almost solely on the inner content, the solution logic, not so much on the outfit - except for the pure mathematical "symmetry".)
Ocean
 
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