Sudokus with an original rare shape

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

Postby m_b_metcalf » Sat Feb 23, 2008 12:10 am

Code: Select all
 7 . . 6 . . 5 . .
 . 8 . . 9 . . 3 .
 . . . . . 1 . . .
 6 . . 7 . . 2 . .
 . 3 . . 4 . . 8 .
 . . . . . . . . .
 1 . . 2 . . 7 . .
 . 4 . . 3 . . 9 .
 . . . . . . . . . SE 9.8/9.8 Pearl, minimal, 19 givens,
                   symmetric about the 8x8 anti-diagonal

As always, diagonals offer a rich seam.

Regards,

Mike Metcalf
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Postby m_b_metcalf » Mon Feb 25, 2008 4:24 pm

jpf will surely recognize this diminished version of a well-known pattern:
Code: Select all
 . 6 . . . . . . 8
 . . 1 . 2 . . 3 .
 . . . 7 . . 5 . .
 . . 3 . 1 9 . . .
 . . . . 5 4 . 2 .
 . . . 8 . . 6 . .
 . . 9 . . 3 . 1 .
 . 8 . . . . . . 7
 . . . . . . . . .  SE 9.0, 9.0 Pearl, minimal, 20 clues,
                    symmetric about the 8x8 diagonal and anti-diagonal

Once again, there are striking symmetries also in the values.

Regards,

Mike Metcalf
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A 20-clue Sudoku with 90°rotational Symmetry

Postby claudiarabia » Sun Aug 17, 2008 11:04 am

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

With best wishes

Claudia
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Re: A 20-clue Sudoku with 90°rotational Symmetry

Postby m_b_metcalf » Sun Aug 17, 2008 3:59 pm

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

Dear Claudia,

Nice to hear from you again.
Code: Select all
 . . . . 9 . . . .
 . . . 6 . 5 8 . .
 . 1 2 . . . 3 . .
 . 5 . . . . . 9 .
 8 . . . . . . . 1
 . 7 . . . . . 4 .
 . . 4 . . . 7 6 .
 . . 9 3 . 1 . . .
 . . . . 8 . . . . SE 8.3

Mit besten Grüssen, von Deinem Nachbar,

Mike Metcalf
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Postby JPF » Sun Aug 17, 2008 6:53 pm

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


HER.E

JPF
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Postby olimpia » Fri Nov 14, 2008 8:07 pm

Here's a nice star shape with good economy of clues (18):
"Raphael"
Code: Select all
.........
.9..1..3.
..6.2.7..
...3.4...
21.....98
.........
..25.64..
.8.....1.
.........
(by Vic Reinhart)
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"cat" (Layout by nataraj) — 28 cells given

Postby Pat » Mon Nov 09, 2015 1:18 pm



    my 1st example is Mild
    Mild.PNG
    Mild.PNG (2.61 KiB) Viewed 209 times
    4.......578.....395.6...8.11...3...7.47...32.....4....9..654..2.1.....6....821...
    [ play ]


    my 2nd example does require 1 "advanced" move
Code: Select all

 3 . . . . . . . 5
 7 8 . . . . . 4 6
 5 . 6 . . . 9 . 1
 1 . . . 9 . . . 7
 . 9 7 . . . 8 2 .
 . . . . 4 . . . .
 9 . . 6 5 4 . . 2
 . 1 . . . . . 5 .
 . . . 3 2 1 . . .

    3.......578.....465.6...9.11...9...7.97...82.....4....9..654..2.1.....5....321...
    [ play ]
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