The Butterfly Effect - Region Sum Lines Sudoku
(Published on 28. February 2022, 20:11 by Mr.Menace)
Rules:
- Normal sudoku rules apply.
- Region sum lines: for each line, 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.
The puzzle is also available on F-Puzzles and CTC. Have fun solving!
Solution code: 5th row and 5th column
Comments
on 14. December 2023, 07:55 by Bankey
Very clever use of grid geometry. Thanks, @ Mr. Menace, @ Abed Hawila :).
on 11. April 2022, 21:40 by davidjshort
A beautiful puzzle.
on 2. April 2022, 13:01 by Novisnage
This is gorgeous! It's hard to recognize some of the steps along the way but once you see them they're just so clearly there and beautiful. Thank you!
on 1. April 2022, 10:13 by Crusader175
I had a hard time solving this at first try. But when I came back after taking a break, I finally see the step I miss! Very nice puzzle!
on 1. April 2022, 00:04 by SimplePurpleFrog
A stunningly good puzzle, pure, clean logic all the way - relatively hard but almost approachable.
Very clever :-)
on 31. March 2022, 03:57 by zetamath
This is just jaw dropping from start to finish. I did this on my stream, and just, wow. This is very easily in the running for my favorite puzzle of all time.
on 1. March 2022, 17:43 by Niverio
Wonderful collab with a wonderful construction ;)
on 1. March 2022, 06:43 by Elliott810
Very nice construction! Thank you, guys.
on 1. March 2022, 01:42 by Playmaker6174
Really nice puzzle, I enjoyed the interactions between the lines :}
on 28. February 2022, 23:12 by Mad-Tyas
Beautiful puzzle!
on 28. February 2022, 21:15 by KNT
Awesome puzzle. One of my better solves as well, at just 14:54
