Sudoku Loop
Inspiriation for this type comes from Italian Sudoku Championship 2019.
Solve online in Penpa+ (thanks Nick Smirnov!)
Apply classic sudoku rules. Draw a single closed loop over the grid lines that doesn’t touch or overlap itself. All even digits are placed outside the loop, all odd digits are placed inside the loop.
Solution code: Row 3, followed by column 8.
on 19. November 2021, 16:54 by Phistomefel
What a nice puzzle! Great variant and wonderfully executed. Thank you, Richard!
on 3. November 2021, 05:07 by Richard
Added link for online solving. Thx Nick!
on 29. October 2021, 03:17 by Nick Smirnov
Penpa:
https://git.io/JPsz8
Draw the loop using Edge (Normal - Thicker) mode. You can use 'Tab' button to switch between Edge and Sudoku modes. Colouring is available if you push 'V' button in Sudoku mode.
on 2. July 2019, 01:14 by bob
Lots of fun, a great combination. I am glad there are more ideas left.