Logic Masters Deutschland e.V.

Coordinate Chaos

(Published on 13. February 2022, 06:38 by grkles)

Fill the grid with the digits 1-9 such that each row, column, and 9-cell region contains a single set with no repeats. Regions must be deduced by the solver.

Digits X-Y-Z in a pill (read top-down or left-right) indicate that the digit Z can be found in row X, column Y.

Each pill crosses two region boundaries (i.e., there are region boundaries between X and Y and between Y and Z), and for each pill, the cell it references must be in a region containing that pill.

Solve online:
F-puzzles.com (turn off conflict highlighting)
Penpa+
CtC App (turn off conflict highlighting)

I wanted to thank the_cogito for helping me figure out the opening and intermediate logic for this puzzle!

Solution code: Column 6, followed by column 7 (18 digits, no spaces).

Last changed on on 16. February 2022, 20:55

Solved by henrypijames, Steven R, twobear, mobiustrip, Playmaker6174, Lizzy01, marcmees, Vebby, Jesper, SudokuExplorer, Piatato, tallcat, achim-t, rmn, kolot, DanScacca, zlotnleo, matiasv5, WarriorKitten, ... rayn, ns08, Mody, AnnaTh, dunder, miraflores, polar, cdwg2000, Christounet, OGRussHood, PippoForte, h5663454, Saskia, nottabird, Tom-dz, Jodelbanane, MicroStudy, dogfarts, Felis_Timon, steeto
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Comments

on 16. February 2022, 20:55 by grkles
Fixing typo

on 16. February 2022, 20:55 by grkles
Added thanks to the_cogito

on 16. February 2022, 00:55 by jmaen
Amazing puzzle, once you get the hang of how the pills are working it solves pretty smoothly indeed! :)

on 14. February 2022, 22:56 by hepcecob
I spent 5 hours staring at this because the rules on CTC do not clarify that each pill has 3 region areas. I interpreted it as each one having exactly 2 regions, not just borders. Please add the same rule clarification to CTC.

Puzzle is great

on 14. February 2022, 01:45 by Piatato
Very elegantly constructed! Felt very smooth. :-D

on 14. February 2022, 00:32 by SudokuExplorer
Lovely idea, and solves very smoothly :-)

on 13. February 2022, 19:42 by Vebby
Great fun! Thanks grkles! :)

on 13. February 2022, 14:31 by Playmaker6174
Very fun and enjoyable puzzle! Quite a couple of sneaky points to spot but all were resolved in a nice way :)

on 13. February 2022, 11:52 by twobear
Very nice indeed! I was expecting the same thing as henrypijames (in the hidden comment) as well :-)

on 13. February 2022, 10:41 by twobear
Thanks, henrypijames!

Last changed on 13. February 2022, 10:21

on 13. February 2022, 10:18 by henrypijames
@twobear: It means that the referenced cell must belong to the same region as (any) one of the three cells in its indexing pill.

Very nice logic, 3½ stars difficulty for me.

Difficulty:4
Rating:97 %
Solved:57 times
Observed:9 times
ID:00094B

Variant combination Online solving tool

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Solution code:

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