Drawing parallels (Irregular 7x7 sudoku)
(Published on 25. March 2023, 12:11 by sujoyku)
- Normal irregular 7x7 Sudoku rules apply, i.e. each row, column and region has to contain the digits from 1 to 7.
- Palindrome: Digits on a grey line form a palindrome, i.e. they read the same forward and backward.
- Killer cages: Digits in a cage do not repeat and sum to the clue in the top left.
- Diagonals: On the main diagonals digits do not repeat.
Here you can solve the puzzle online:
Solution code: Row 2 followed by Column 6, from left to right resp. from top to bottom (14 digits in total)
Comments
on 20. August 2024, 21:10 by sujoyku
changed sudokupad solving link to include solution check (many thanks to garycblack for providing that link!), no changes to the contents of the puzzle
on 20. August 2024, 20:46 by garycblack
SudokuPad solution link:
https://sudokupad.app/hd6d2ttlq2
The lettering comment helped me out a lot. I had to get a pen out for the math at the end XD.
**
Thank you for your comment, garycblack, and also thank you for the solving link with solution check! I will embed that into the puzzle page above. I am glad that using letters has worked out well for you.
Kind regards, sujoyku
on 2. May 2024, 21:43 by Lenivaya_Joppa
Thank you for this nice puzzle, dear sujoyku! :)
**
You are much welcome, Lenivaya_Joppa, thank you for commenting! I am glad that you liked the puzzle.
Kind regards, sujoyku
on 29. September 2023, 11:21 by faltenin
Incredible how taking the right approach (hinted at in the comments) suddenly makes this approachable. Thanks!
**
Thank you for your comment, faltenin! I am glad that you found the puzzle to be approachable.
Kind regards, sujoyku
on 13. September 2023, 15:59 by KingIsulgard
I used coloring but had to restart after messing it up. Took a bit longer than you'd expect of a 7x7 sudoku. 10 minuts for me.
**
Thank you for your comment, KingIsulgard! Using colouring was definitely a good idea. I think there is not too much chance to get something done with the cages immediately. I hope you had a fun solve.
Kind regards, sujoyku
on 1. September 2023, 23:59 by dakamojo
I loved this. At first I was stuck. I convinced myself there was no way to place a number without coloring. So I started that. It got to be a huge mess. Then I read the comments and they mentioned using letters. I had never used this technique but once I started that path it because obvious how to solve it. Thanks for the puzzle.
**
You are welcome, dakamojo, thank you for your comment! I am glad that you enjoyed the solve and it is nice that using letters helped you. I think the main difficulty with the colouring is the question where to start. When setting I often use letters as well.
Kind regards, sujoyku
on 30. August 2023, 01:02 by anyeyeball
Very nice! Glad to see others using the lettering method. Very smooth solve that way, and so fun to double-click a letter and replace them 7 at a time.
**
Thank you for your comment, anyeyeball! I am glad that you enjoyed the puzzle and had a smooth solve. And I completely agree: It somehow feels very satisfying to put in all of one digit at the same time.
Kind regards, sujoyku
on 25. August 2023, 14:35 by Blobz
Great little puzzle. Enjoyed it immensely!
**
Thank you for your kind comment, Blobz! Since I was inspired by some of your variant sudokus to set smaller puzzles myself, it means a lot to me that you liked this one.
Kind regards, sujoyku
on 30. July 2023, 21:48 by Cyrion
I agree this is rather a 2/5 star puzzle, instead of 1/5. I didn't read any comments, stared at the puzzle and finally thought of colouring the cells. That helped solving :-) Thanks for the puzzle, I did enjoy it!
**
Thank you for your comment, Cyrion! I agree with your assessment of difficulty. To use colouring is probably the best way to approach it. But even then one should start in the "right places". Anyway, I am glad that you enjoyed the solve.
Kind regards, sujoyku
on 25. May 2023, 14:11 by RussKozerski
Parallel lines have so much in common. It's a shame they'll never meet.
I stared at this many times. Looking at the comments, I decided to try using letters, and it was an easy solve. I think if I'd used colors it would have been much more difficult. And trying to use numbers, not possible for me. So as with many things in life, the difficulty depended on the approach.
**
Thank you for the comment, RussKozerski! It is also possible to use colours but I think it might be not so obvious where the useful starting point for colouring is. Anyway, I am glad that using letters turned out to be helpful for you.
Kind regards, sujoyku
on 22. April 2023, 20:49 by puzzlepandit
That's not one star. I am feeling lucky I looked at the right cell. Nice symmetry and arrangement though. Full marks there.
**
Hey puzzlepandit, thank you for your comment! I am glad that you liked the arrangement of the puzzle. I also agree that the difficulty should be closer to 2/5, but be that as it may.
Kind regards, sujoyku
on 27. March 2023, 23:46 by Infernath
First puzzle completed under 10 min. Great puzzle!
**
Hey Infernath,
thank you for your comment and congratulations on such a quick solve! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 27. March 2023, 16:03 by Something Wellesian
I’d agree with another commenter that this is not a 1-star puzzle. In the end I used letters rather than colours, and once I did that I found my way to the solution fairly quickly.
**
Thank you for your comment, Something Wellesian! During setting puzzles, I also often use letters instead of colours.
Nice that it helped you solving.
Kind regards, sujoyku
on 27. March 2023, 06:54 by thoughtbyte
Very nice, thanks!
**
Thank you for your comment, thoughtbyte! I am happy that you liked the puzzle.
Kind regards, sujoyku
on 27. March 2023, 01:58 by WanderingArchetypes
I used coloring for this puzzle as well! I enjoyed it!
**
Thank you for your comment, WanderingArchetypes! I am glad you enjoyed the puzzle.
Kind regards, sujoyku
on 26. March 2023, 18:57 by geronimo92
Not a 1 star puzzle at all !!
**
Hey geronimo92, thank you for your comment! Initially, I set the difficulty level to 2/5.
Kind regards, sujoyku
