Normal sudoku rules apply.
The solver must find a single loop of orthogonally connected cells which enters every 3x3 box but does not branch or touch itself (even diagonally).
Adjacent digits on the loop are either consecutive or in a 1:2 ratio.
A digit in a circle or square must show the number of loop cells in the surrounding 9 cells (including itself if it is on the loop).
Circles contain odd digits. Squares contain even digits.
Solution code: row 9
on 31. August 2023, 15:28 by samuel1997
Very nice!
on 25. August 2023, 06:01 by joshfrew
Not too difficult... Still took me 1.5hrs, but 1.5hrs of pure joy that is!!
on 24. August 2023, 16:43 by nearestneighbour
That was fun, love this type of puzzles
on 24. August 2023, 07:36 by Nordy
Awesome! Lots of opportunities to be bamboozled which makes for a very fun (and sometimes tense) solve
on 24. August 2023, 00:20 by Jreg
This puzzle is unforgiving, but worth it! I gave it two stars, it's not that difficult, it's just that you have to constantly be mindful of all the options and those options' options.
on 23. August 2023, 23:11 by yttrio
Excellent puzzle! I thought I broke it about 10 minutes in, but then realized that I forgot a possibility :)
Really nice flow once things got going!
on 23. August 2023, 19:36 by ElChiglia
Really nice puzzle. I might be biased though, my recently created puzzle (feel free to take a look at it too) was a combination of loops/snakes and Kropki too, because I really like that combination and its interactions :)
on 23. August 2023, 18:36 by bansalsaab
I struggled with this one. missed a trick i am sure.
on 23. August 2023, 16:35 by kamkam
Lovely puzzle! Straight forward but got lost at some point
on 23. August 2023, 15:43 by kporadzinski
Wow. I became the fastest solver for the first time in my career at logic-masters.de :) Very nice puzzle.