Ice Nine
(Published on 12. January 2026, 05:08 by juggler)
CHAOS CONSTRUCTION - Divide the grid into 9 regions, and place the digits 1 to 9 once each in every row, column, and region. Some region boundaries are given.
ICE - Digits separated by a small snowflake differ by exactly the value on the large snowflake.
Solution code: Digits in the center cell's region, in reading order (i.e. left to right top to bottom).
Comments
on 15. January 2026, 22:22 by davidz32z
Hahahaha I loved this so much
on 13. January 2026, 18:34 by Lonzz
Crazy but lovely puzzle. Though the Sudoku can be solved even without the small snowflake in column 1.
on 13. January 2026, 08:10 by fredchen
I think this puzzle is the most bizarre thing I did today.
Lovely idea. Thank you
on 13. January 2026, 00:23 by Atticus837
What a lovely idea with a silly execution. Brilliant!
on 12. January 2026, 17:44 by Guvenistan
To clarify the solution code (harder than the puzzle): Refer to r5c5 digit and enter the numbers belonging to that region. Start at the top row of this region and enter the numbers left to right, then the 2nd row left to right, then so on and so forth.
on 12. January 2026, 15:38 by Bozzle
Great little puzzle. Flows nicely.
on 12. January 2026, 14:50 by eladv
very cool! And the solve path rhymes beautifully with the literary reference (and the chemistry reference :) )
on 12. January 2026, 13:40 by ScatterBrain
For the solution code write each number left to right on each line top to bottom, within the selected region!
on 12. January 2026, 13:31 by firespire
Fun
on 12. January 2026, 13:19 by AshBrown
Wth is the solution code. Harder than the puzzle
on 12. January 2026, 12:59 by PatJoyce
Figured it out. You read from the top most digit, left to right.
on 12. January 2026, 12:55 by PatJoyce
Solved! But absolutely no idea what the solutuion code is supposed to be. I've tried a dozen different combination and they're all wrong. What gives?
on 12. January 2026, 11:33 by rhyrhy
Crazy.
on 12. January 2026, 10:04 by faltenin
A really nice puzzle that seems impossible at first then all falls into place.
on 12. January 2026, 09:33 by Piatato
I don't know if this qualifies as a puzzle, but it's cute!
on 12. January 2026, 08:30 by Peteronium
Same comment as wuc. Actually entering the solution code gave me more trouble than solving the puzzle
on 12. January 2026, 07:01 by wuc
Awesome approachble cc with big „aha“ effects. Great way to start a monday thx.
