Backtracking
(Published on 16. June 2025, 21:11 by MSDOS)
click on image to play
Rules
Normal sudoku rules apply and all clues are standard.
Entropy Lines: Each set of 3 adjacent digits on an peach entropy line must contain a low digit {1,2,3}, a middle digit {4,5,6}, and a high digit {7,8,9}.
Arrows: Digits along an arrow line must sum to the digit in the attached circle.
Killer Cages: Digits in a cage must sum to the value indicated in the top left corner.
Play on SudokuPad!
Solution code: Column 8 from top to bottom. (9 digits)
Comments
on 18. June 2025, 15:57 by Exigus
Very nice, got some initial ideas then stuck for a long time and then it clicked and solved smoothly from there. Thanks!
on 18. June 2025, 15:06 by Snookerfan
Very nice! I enjoyed it a lot. Thank you
on 17. June 2025, 16:01 by rameshsrivats
Very cool puzzle. I asked the right questions, so was able to finish in 21 minutes.
MSDOS: Nice speedrun!
on 17. June 2025, 14:05 by fractalminding
Hello! The solving took me more than 4 hours. I tried all kinds of ideas, but I couldn't find anything. But I didn't want to give up. When I found the key ideas, it was amazing. I don't think it's a 3-star difficulty. I vote for 4.
I make sudoku too. But I've never been able to do such complex and beautiful things. How long have you been working on this Sudoku?
Thank you for sharing.
MSDOS: Thanks for the comment! I'm glad you stuck with it and didn't give up! I've been setting for a little over a year now. To be honest, I often set first for beauty/symmetry, and then I discover that there is an interesting property or restriction that I can try to leverage.
on 17. June 2025, 04:45 by Tacocat
It took me 2h. The break in was very hard for me but I think I finally found the intended path. Very elegant setting, and rewarding to solve, thank you!
on 16. June 2025, 22:19 by sujoyku
Wonderful puzzle! I loved especially the opening. But also the flow that followed was really enjoyable. Thank you, MSDOS!
MSDOS: Thanks so much sujoyku! Glad you enjoyed :)
