The New Sudoku Players' Forum

[spidersudoku]

Hello,

I have created a new variation, the Spider Sudoku !





http://spidersudoku.com for more puzzles!

Contact : contact@spidersudoku.com

Spidersudoku.com in English

[lunababy_moonchild]

You might want to put in a little in the way of instructions for the english speaking amongst us.

Luna
Moderator

[spidersudoku]

The grid of Spider Sudoku is made up of:

______9 columns_____________________9 lines_______________________9 boxes


Every column, line, and box contains the digits 1 through 9.


What do you think about the Spider Sudoku?

[spidersudoku]

Give your opinions about the Spider Sudoku!

[Ruud]

Give your opinions about the Spider Sudoku!

I wonder what is so new about this format?

There are 9 rows, 9 columns and 9 3x3 boxes, so basically you have a vanilla sudoku.

The only difference is that the whole picture is warped, leaving you with a few cells that can hardly contain a number, let alone pencilmarks, and other cells with way too much space.

Your sample puzzle can also be shown as:

Code: Select all

1 . .|. . 5|. . 3
. 8 9|6 4 .|1 . .
5 . .|. . 1|. . 9
-----+-----+-----
. . 6|. 5 .|4 . .
7 9 .|4 3 .|. 5 6
. 4 .|. . 6|. 9 .
-----+-----+-----
. 3 .|. . 7|. 8 .
6 5 .|3 8 .|. 1 2
. . 8|. 9 .|3 . .

Actually, this is a very easy sudoku. No fun at all.


Conclusion: Looks nice, but this is not really a new variant.

Ruud

[udosuk]

Conclusion: Looks nice, but this is not really a new variant.

I noticed that it's virtually the same as vanilla sudoku too...

The only exception is that if we add the "diagonal" constraint than it could be applied in 18 "lines" (spirals?) instead of the normal 2 in "sudoku X", i.e. all the "broken diagonals" are now easier to see... Similar to a "cylindrical sudoku"...

PS: Just recalled that last year dukuso or Condor had proved that there is no valid sudoku grid with all 18 broken diagonals... perhaps with 1 particular direction of 9?

PS2: Oh yeah... If applied to cylindrical jigsaw or killer puzzles the nonets/cages are easier to present... But as we've seen the inner cells are too small... Perhaps if we put a "hole" in the middle and make it a ring instead of a solid circle/nonagon?

[Jean-Christophe]

Yes, basically it's just a regular sudoku using polar coordinates (r,theta) instead of rectangular coordinates (x,y). Besides this, the logic is excacly the same as the regular sudoku.

Now, using your idea, you may find some real new variant. Maybe with fewer cells near the center and more in the outer rings.

[spidersudoku]

New Spider Sudoku with a little more originality!

________6 spirals__________________6 hexagons__________________6 boxes


Every spiral, hexagon, and box contains the digits 1 through 6.

The 6 spirals are represented by the colors, there are 2 green spirals, 2 yellows and 2 reds.

Give your opinions!

[Pyrrhon]

The variant is not new. I saw links in sudoku forums to a page in France with this type. But I can't neither remember the adress nor the forum where it was.

By the way a nice outfit for cylindrical sudoku like my cylindrical stairstep or other ones.

Pyrrhon

[spidersudoku]

It is normal that you saw this variant on a French forum because it is me which posted it.

I post on e-sudoku.fr forum for French and sudoku.com forum for the whole world.

Spider Sudoku on e-sudoku.fr forum

[Pyrrhon]

No it wasn't a french forum but only a link to a french page. The name was another one, but I can't remember which. They had more colored there grids and also other numbers of corners. I remember that I tested this variant and have stopped seeing that it is old wine (vanilla sudoku) in a new bottle (german saying: "alter Wein in einem neuen Schlauch").

By the way. similar variants are also named circular sudoku.

Pyrrhon

[spidersudoku]

I sought but I did not find anything which resembles Spider Sudoku...

[spidersudoku]

If you want to play Spider Sudoku go on spidersudoku.com!

easy grid

medium grid

hard grid

and to print, click on the link on the bottom of the grid.

[udosuk]

It seems the 6-spiral one doesn't have a unique solution?

I found 4:

Code: Select all

 2          4
  1        2
   6      2
    3    2
     4  2
      13
363116  256545
      54
     3  6
    5    4
   1      4
  5        3
 1          6


 1          4
  1        2
   6      2
    3    2
     4  5
      13
263116  226145
      54
     3  6
    5    4
   5      4
  3        5
 3          6


 2          1
  4        2
   6      2
    3    2
     1  2
      13
463146  256415
      54
     3  6
    5    4
   1      5
  3        5
 3          6


 2          1
  4        2
   6      2
    3    2
     1  2
      13
363146  256515
      54
     3  6
    5    4
   1      4
  5        3
 4          6

BTW it's isomorphic to the following 3x2 vanilla sudoku:

Code: Select all

 . . | . . | 1 3
 6 . | . . | . .
 . 1 | . . | . 4
-----+-----+-----
 3 . | 2 . | . .
 . 2 | . . | . .
 . . | 6 . | . .

Which you could work to this stage and then 4 solutions emerge:

Code: Select all

 2   4   | 5   6   | 1   3   
 6   3   | 14  14  | 25  25 
 5   1   | 3   2   | 6   4   
---------+---------+---------
 3   6   | 2   145 | 45  15 
 14  2   | 14  35  | 35  6   
 14  5   | 6   134 | 234 12 

 2 4 | 5 6 | 1 3
 6 3 | 1 4 | 2 5
 5 1 | 3 2 | 6 4
-----+-----+-----
 3 6 | 2 5 | 4 1
 1 2 | 4 3 | 5 6
 4 5 | 6 1 | 3 2

 2 4 | 5 6 | 1 3
 6 3 | 1 4 | 5 2
 5 1 | 3 2 | 6 4
-----+-----+-----
 3 6 | 2 1 | 4 5
 1 2 | 4 5 | 3 6
 4 5 | 6 3 | 2 1

 2 4 | 5 6 | 1 3
 6 3 | 4 1 | 2 5
 5 1 | 3 2 | 6 4
-----+-----+-----
 3 6 | 2 4 | 5 1
 4 2 | 1 5 | 3 6
 1 5 | 6 3 | 4 2

 2 4 | 5 6 | 1 3
 6 3 | 4 1 | 2 5
 5 1 | 3 2 | 6 4
-----+-----+-----
 3 6 | 2 5 | 4 1
 4 2 | 1 3 | 5 6
 1 5 | 6 4 | 3 2

I regard having a unique solution as a basic requirement for a decent puzzle... Probably just me...

[udosuk]

Frankly, all 3 of your sample puzzles are very easy (solved by hidden/naked singles) and the one you rated as "hard" (difficile) is in fact the easiest among them to me... (And they're nothing different to normal sudoku except appearance, which has been stated by many before...)

I seriously suggest you to make use of this shape for something special like the cylindrical sudokus (see this and this)... Also I think you better design some puzzles which look symmetrical in your layout instead of just copying some puzzles which are symmetrical in the 9x9 square layout...

Here're your 3 sample puzzles in the 9x9 square layout:

Code: Select all

8.....6..
.37.65...
..59.4...
.76.1.5..
91.....87
..2.9.41.
...1.93..
...47.82.
..9.....1

.7......8
1..39....
.3.4.6.5.
89.2.....
..7.1.4..
.....4.26
.2.6.1.8.
....45..1
6......7.

..2......
.96.1..3.
...49..67
...3.58..
.85...17.
..47.1...
42..58...
.1..7.39.
......4..