The New Sudoku Players' Forum

[JPF]

There seems to be a real problem with this pattern...

Code: Select all

 x x x | x x x | x x x
 x x x | . . . | x x x
 x x x | . . . | x x x
-------+-------+-------
 x . . | . . . | . . x
 x . . | . x . | . . x
 x . . | . . . | . . x
-------+-------+-------
 x x x | . . . | x x x
 x x x | . . . | x x x
 x x x | x x x | x x x


This pattern has been discussed here and here .

Code: Select all

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


or

Code: Select all

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


in both cases if we remove r6c4, the puzzles have 2 solutions.

JPF

[m_b_metcalf]

This pattern has been discussed here and here .

Dear JPF,
Many thanks for the clarification. As a token of my gratitude, I offer you an intermediate state of mitosis:

Code: Select all

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

 Time: 2.87s Try: 59266  SE 8.4



Regards,

Mike Metcalf

[JPF]

Thanks a lot Mike !

If we start by the beginning we have the following Mitosis process :

Code: Select all


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


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


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


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



Maybe 1 or 2 steps are still missing

JPF

[m_b_metcalf]

Thanks a lot Mike !

If we start by the beginning we have the following process :
.....

Maybe 1 or 2 steps are still missing

JPF

Well, of course, the cell nuclei are missing!

Code: Select all

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

 Time:   10.14 Try: 15327   SE 8.4


Regards,

Mike

[Carcul]

If we start by the beginning we have the following process:

Nice puzzles. For example, the last one:

Code: Select all

 *-----------------------------------------------------------*
 | 78     67     3     | 4      5      9 | 2678   1267   128 |
 | 4579   2      459   | 8      1      6 | 3457   347    49  |
 | 1      4569   45689 | 2      3      7 | 4568   46     489 |
 |---------------------+-----------------+-------------------|
 | 2      3      59    | 59     7      4 | 1      8      6   |
 | 6      149    149   | 3      8      2 | 47     479    5   |
 | 459    8      7     | 59     6      1 | 24     249    3   |
 |---------------------+-----------------+-------------------|
 | 3489   149    12489 | 6      29     5 | 2348   1234   7   |
 | 3479   4679   2469  | 1      29     8 | 2346   5      24  |
 | 58     156    12568 | 7      4      3 | 9      126    128 |
 *-----------------------------------------------------------*


[r1c1]=8=[r3c3]-8-[r2c9|r3c89](-6-[r9c8])-4-[r8c9]-2-[r9c89]-1,8-[r9c12]
-6-[r1c2]-7-[r1c1], => r1c1<>7 solving the puzzle.

Carcul

[JPF]

I suppose the challenge would be a puzzle that comes from a GRID that displays diagonal symmetry.........

which is unfortunately not possible

Nice puzzles.

Thanks for the analysis.

JPF

[JPF]

Here's a puzzle I like : 21 clues, minimal.

Code: Select all

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



Its SE rating is 1,5 !
Here's a challenge : find a puzzle with the same pattern with the highest SE rating.

JPF

[tarek]

I suppose the challenge would be a puzzle that comes from a GRID that displays diagonal symmetry.........

which is unfortunately not possible

sadly

Nice puzzle JPF (Almost an untouchable) .... if it is SE 1.5 then it is an N valid puzzle (according to gsf), a puzzle solvable using hidden singles only........ The puzzle reminds me of Cartier jewellery for some reason

If you like it that much then why not let us search for it in each category........ singles ..... superior ......superior plus & hardest????

tarek

[JPF]

The puzzle reminds me of Cartier jewellery for some reason
If you like it that much then why not let us search for it in each category........ singles ..... superior ......superior plus & hardest????

Ok, I'm sure Claudia will appreciate

JPF

[claudiarabia]

The puzzle reminds me of Cartier jewellery for some reason
If you like it that much then why not let us search for it in each category........ singles ..... superior ......superior plus & hardest????

Ok, I'm sure Claudia will appreciate
JPF

Yes, it is very elegant and stylish indeead. One could make a piece of jewllery out of it. In ancient times people wore numeric amulets. Why not make a modern one, where many numbers are still to set?

I'll try if I can make something like that, but won't determine a level yet.

With best wishes Claudia

[Ocean]

Yes, it is very elegant and stylish indeead. One could make a piece of jewllery out of it.

Here is a piece with moderate difficulty - just the level I prefer when solving by hand.
Can be solved with Swordfish followed by xy-wing.

Code: Select all

# "Sword with Wing" Jewelry
 *-----------*
 |...|.12|34.|
 |...|...|.5.|
 |.26|7..|...|
 |---+---+---|
 |.4.|...|.2.|
 |.7.|...|.8.|
 |...|.26|91.|
 |---+---+---|
 |.9.|...|...|
 |.82|95.|...|
 |...|...|...|
 *-----------*

[Pat]

it is very elegant and stylish indeead. One could make a piece of jewllery out of it.

with the dots it looks like this -

Code: Select all

....****.
.......*.
.***.....
.*.....*.
.*.....*.
....****.
.*.......
.****....
.........



- but remove the dots and see the jewelry -

Code: Select all

    oooo
       o
 ooo     
 o     o
 o     o
    oooo
 o       
 oooo   
         



~ Pat

[JPF]

I had a call from the jeweller.
He told me that some customers complained about the weight and the safety regarding their jewellery.

To make it short, he asked to produce minimal and untouchable pieces.
One or two removed clues would be welcome, but only if the same élégance is kept.

Nice puzzle JPF (Almost an untouchable) .... The puzzle reminds me of Cartier jewellery for some reason

Here's one untouchable
21 clues, minimal :

Code: Select all

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



Here's one new design :
20 clues, minimal, untouchable

Code: Select all

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



JPF

[claudiarabia]

I
Here's one new design :
20 clues, minimal, untouchable

Code: Select all

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



JPF

Whow! A meddling of rotational symmetry and Repetitional band symmetry! Would fit good into Gordon Royles Symmetry-Zoo.

I also actually thought about letting make one of my sudokus as a piece of jewellery.

Claudia

[gsf]

Code: Select all

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


Whow! A meddling of rotational symmetry and Repetitional band symmetry! Would fit good into Gordon Royles Symmetry-Zoo.

where is the symmetry here?