Normal sudoku rules apply.
The grid contains three loops. A loop may be "German Whisper", "Entropic", or "Region Sum". The nature of the loops (which may repeat) are to be determined by the solver.
German Whisper: Adjacent digits along a German Whisper line must differ by at least 5.
Entropic: Any set of three sequential cells along an Entropic line must contain a low (1-3) digit, a middly (4-6) digit, and a high (7-9) digit.
Region Sum: Digits on the line have an equal sum N within each box it passes through. If a line passes through the same box more than once, each individual segment of such a line within that box sums to N separately.
Have fun, leave a comment if you enjoy the puzzle!
Solution code: Row 4 followed by Row 7
on 23. September 2024, 16:03 by MrWhite2020
Region some lines needed some excruciating sudoku to resolve even after finding the required sum.
on 12. March 2023, 00:08 by Ragna
Okay, I got it. Thank you for your help.
on 11. March 2023, 09:27 by LehanLehan
Thank you very much,Blobz;your puzzles are always a treat and have a very nice logic.
on 10. March 2023, 16:49 by ViKingPrime
Very nice puzzle! Even after you determine the nature of each line, it doesn't give up its secrets easily.