Messier 43 (Galaxy Region Sum Lines)
(Published on 1. October 2022, 01:31 by purpl)
Rules:
Normal sudoku rules apply.
The dots given in the grid are the centers of point symmetric galaxies (non-overlapping sets of orthogonally-connected cells), which function as region sum areas.
Galaxies must take all cells touching the dot (for example the galaxy dot in box 5 must take all four cells in its 2x2).
Region sum areas have an equal sum N within each box they visit, and they must visit more than one box.
In this puzzle, multiple visits to a box does not reset the sum (this rule is not needed for the solve it is simply a clarification so that the solver doesn't have to consider strangely shaped lines).
In contrary to a classical galaxy puzzle, not every cell in the grid has to be part of a galaxy.
Links:
If you enjoyed this puzzle, consider leaving a rating and comment or better yet recommend it to your fellow solvers! I hope you do so for all the puzzles you enjoy ;)
I have a YouTube channel where we discuss puzzles and setting them. Including recent interviews of Phistomefel, jovi_al, grkles, and more.
Solution code: Row 3 followed by column 8 (left to right, top to bottom, 18 digits, no spaces or commas)
Comments
on 26. October 2022, 18:37 by purpl
Clarified galaxy rules.
on 22. October 2022, 06:25 by Elliptical
Top shelf.
on 10. October 2022, 23:52 by Christounet
Loved it ! This puzzle lived up to its venerable ancestors, with a fresh region sum flavour that felt very natural.
Also, well done with your setter spotlight serie that gives a lot of interesting insight for non-setter solvers like me.
on 10. October 2022, 16:45 by Qodec
Fantastic!
on 9. October 2022, 18:53 by Piatato
Very nice puzzle! I enjoyed it a lot throughout
on 9. October 2022, 14:30 by filuta
very easy, then very hard, then very easy again, the bottom three rows were stunning!
on 3. October 2022, 00:57 by Vebby
Great puzzle! Loved how intricately the various region sums interacted. Thanks Meme :)
on 1. October 2022, 23:21 by Phistomefel
I can quite confidently say that there is not a single trap I haven't stumbled into. Nevertheless, it made me find a lot of the very neat deductions in your puzzle. Thank you, Memeristor!
on 1. October 2022, 16:33 by Jesper
Wonderful, thanks!
on 1. October 2022, 02:17 by Andrewsarchus
Great idea to combine region sums with spiral galaxies! The constraints work very well together. Great puzzle!
on 1. October 2022, 01:32 by the_cogito
Nice puzzle! Had fun with this, and a pretty tricky midsolve too ;)
