Logic Masters Deutschland e.V.

Messier 43 (Galaxy Region Sum Lines)

(Eingestellt am 1. Oktober 2022, 01:31 Uhr von purpl)

Recently, I interviewed Phistomefel and we were discussing his older puzzles, including his Galaxy Killer Sudoku, reminding me that I really enjoyed the Spiral Galaxy Sudoku hybrids from that time period. I decided I would make my own puzzle using this ruleset. I almost immediately found something I loved, but spent over a week trying to figure out how to make it work. It ended up that the midsolve was pretty tricky, but the logical deductions you can find in there are both surprising and elegant (although I am sure you can smash through them with a hammer if you'd like to).

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:

f-puzzles

CtC Webapp

Penpa+

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.

Lösungscode: Row 3 followed by column 8 (left to right, top to bottom, 18 digits, no spaces or commas)

Zuletzt geändert am 26. Oktober 2022, 18:37 Uhr

Gelöst von the_cogito, Andrewsarchus, mnasti2, crispy16, Jesper, KNT, Phistomefel, PulverizingPancake, abed hawila, dhv, MagnusJosefsson, Vebby, Hazem-77, tinounou, Jaych, twobear, harrison, polar, filuta, ... MrQubo, ymhsbmbesitwf, Mody, dogfarts, lerroyy, Onkel_Dagobert, talkiewalkie2141, michaal94, mse326, Uhu, PippoForte, nottabird, Askloomok, Krisonium, Jolly Rogers, gdc, trashghost, halakani
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Kommentare

am 26. Oktober 2022, 18:37 Uhr von purpl
Clarified galaxy rules.

am 22. Oktober 2022, 06:25 Uhr von Elliptical
Top shelf.

am 10. Oktober 2022, 23:52 Uhr von 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.

am 10. Oktober 2022, 16:45 Uhr von Qodec
Fantastic!

am 9. Oktober 2022, 18:53 Uhr von Piatato
Very nice puzzle! I enjoyed it a lot throughout

am 9. Oktober 2022, 14:30 Uhr von filuta
very easy, then very hard, then very easy again, the bottom three rows were stunning!

Zuletzt geändert am 3. Oktober 2022, 00:57 Uhr

am 3. Oktober 2022, 00:57 Uhr von Vebby
Great puzzle! Loved how intricately the various region sums interacted. Thanks Meme :)

Zuletzt geändert am 2. Oktober 2022, 11:33 Uhr

am 1. Oktober 2022, 23:21 Uhr von 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!

am 1. Oktober 2022, 16:33 Uhr von Jesper
Wonderful, thanks!

am 1. Oktober 2022, 02:17 Uhr von Andrewsarchus
Great idea to combine region sums with spiral galaxies! The constraints work very well together. Great puzzle!

am 1. Oktober 2022, 01:32 Uhr von the_cogito
Nice puzzle! Had fun with this, and a pretty tricky midsolve too ;)

Schwierigkeit:5
Bewertung:99 %
Gelöst:58 mal
Beobachtet:4 mal
ID:000BGL

Variantenkombination Neu Online-Solving-Tool

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