Logic Masters Deutschland e.V.

Gossiping Queens on 7x7 Torus

(Eingestellt am 10. September 2020, 17:44 Uhr von SudokuExplorer)

Since my earlier Queens on 7x7 Torus sudoku was a bit too easy, I decided to add a twist. This variant is very similar to a latin square. If you want a larger torus puzzle, you might also like to try my Queens on 11x11 Torus sudoku. If you are struggling with this puzzle, then do try this anti-king puzzle first.

In each row and column, we have the numbers 1 to 7.
Each row and column has two empty cells, two gossiping cells and three normal cells.
The cells all have the toroidal anti-queen constraint. That is no two cells a queen's move away can contain the same digit (this is true even when you move diagonally from one side to the other side of the grid/torus).

Each gossiping cell has exactly two digits (with the smaller one on the left, and the larger number on the right). Three gossiping cells have been given and have been coloured red (either the smaller or larger digit has been given).

Each empty cell has no digits. One empty cell has been given and has been coloured black.

A normal cell has exactly one digit. Four normal cells with the digits 1, 2, 4 and 6 (in white) have been given.

You can try this on Penpa. I hope this is a more interesting challenge.

Lösungscode: Enter the digits in the 1st, 4th and 7th rows (left to right).
For each red cell enter the smallest digit first, then the larger digit.
For each black cell enter the digit 0. (That is, 27 digits in total)

Zuletzt geändert am 21. September 2020, 19:18 Uhr

Gelöst von Dandelo, NikolaZ, TimE, Zzzyxas, Semax, Krokant, Voyager, dm_litv, Storm, Bobby, Dina, AsilG, Swood, Skyler, zorant
Komplette Liste


am 14. Dezember 2020, 18:42 Uhr von SudokuExplorer
Thanks Dina, I'm pleased you found it an amusing solve :-)

am 14. Dezember 2020, 04:18 Uhr von Dina
Funny theme and quite challenging, thanks!

Zuletzt geändert am 12. Dezember 2020, 17:28 Uhr

am 12. Dezember 2020, 03:11 Uhr von Storm
I really liked the concept!
Thanks! :-)

am 23. September 2020, 17:12 Uhr von SudokuExplorer
@Voyager Thanks for persevering with it. Very well done in succeeding with a logical solution, and I'm pleased to hear that it was a helpful experience! :-)

am 22. September 2020, 22:59 Uhr von Voyager
@SudokuExplorer: I finally found a pure logical path; so this puzzle helped me to regain some logical strength. Thanks for this puzzle!

am 21. September 2020, 23:48 Uhr von Dandelo
There is also a logical path without seeing this a priori...

But he can't read the hidden comment until he has solved it. If he writes a hidden comment himself, you can edit it and he can read it.

am 21. September 2020, 22:03 Uhr von SudokuExplorer
@Voyager There is a trick which makes it easier. See my future hidden comment for a hint.

am 21. September 2020, 22:03 Uhr von Dandelo
@voyager: I remember there was a straight logical way. Some tricky steps, but not too hard. It deserves more solvers.

am 21. September 2020, 21:36 Uhr von Voyager
Sadly my logic is not good enough to solve this puzzle - I tried it twice; but I already had a lot of fun with the title!

am 21. September 2020, 21:23 Uhr von SudokuExplorer
Btw I totally agree that there is no point in having 5 or so killer sudoku tags. They should somehow combine them into one tag, which everyone should then start using.

am 21. September 2020, 21:07 Uhr von Dandelo
But that's strange: If you click on the written label, you find all the old toroidal puzzles. I'm sure they had the picture label...

am 21. September 2020, 21:03 Uhr von Dandelo
Or there was a problem with the server, maybe the picture was not readable.

am 21. September 2020, 21:00 Uhr von Dandelo
Rotstein's puzzles also have two toroidal labels ...

Probably someone tries to clean up the labels. We don't need 5 Killersudoku labels, or 2 toroidal labels. You should use the pictures if possible. Don't start a new label, when it already exists.

Zuletzt geändert am 21. September 2020, 21:03 Uhr

am 21. September 2020, 20:55 Uhr von SudokuExplorer
The picture label has existed for as long as I have used this portal. Also the written toroidal tag has not been deleted.

Maybe they changed the icon to automatically include the written tag (which links to more puzzles than the icon does).

am 21. September 2020, 20:53 Uhr von Dandelo
Maybe you have written "toroidal" (he too) and someone has corrected the mistake by deleting the text label and adding the picture label?

Zuletzt geändert am 21. September 2020, 20:53 Uhr

am 21. September 2020, 20:49 Uhr von SudokuExplorer
@Dandelo It also happened to Rotstein's puzzles...

I initially added the icon when I created the puzzle, but the icon disappeared today.
Now that I only added the disappeared icon again, a written tag has also appeared. That's strange...

am 21. September 2020, 20:44 Uhr von Dandelo
I think it hasn't disappeared. Now you have it twice. Maybe you've forgotten that it is a picture?

Zuletzt geändert am 21. September 2020, 19:40 Uhr

am 21. September 2020, 19:20 Uhr von SudokuExplorer
Can anyone explain why the toroidal tag just randomly disappeared from all the puzzles? Was there a recent update to the portal?

If they wanted to get rid of tags, they might as well have got rid of all multiple tags such as for killer sudokus.

am 21. September 2020, 19:18 Uhr von SudokuExplorer
Added toroidal tag (it seems to have magically disappeared)

am 13. September 2020, 22:52 Uhr von SudokuExplorer
Added link to anti-king puzzle

Zuletzt geändert am 11. September 2020, 19:32 Uhr

am 11. September 2020, 19:31 Uhr von SudokuExplorer
Thanks, I'm glad you had a great TimE!

It was my first time trying to make a non-sudoku puzzle. There was a little bit more number theory behind the scenes (just like the toroidal anti-queen sudokus, see the second bonus puzzle of the 7x7 sudoku).

am 11. September 2020, 13:46 Uhr von TimE
Cool variant! Like a sudoku but more interesting.

am 10. September 2020, 22:38 Uhr von SudokuExplorer
@Dandelo Thanks for giving it a go, even though you're not a fan of latin squares. I'm glad you still enjoyed the break-in and the solution path. :-)

am 10. September 2020, 22:19 Uhr von Dandelo
Nice puzzle, nice break-in, nice solving path, but definitely not my favourite puzzle type.

am 10. September 2020, 18:03 Uhr von SudokuExplorer
Clarified solution code

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Färberätsel neuartiges Rätsel toroidal Variante eines Standardrätsels

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