Another Kind of Entropy
(Published on 5. January 2022, 10:22 by BellBear)
This puzzle is inspired by the entropy puzzles of Mad-Tyas .
Rules:
- Sudoku: place every digit from 1 to 9 once in each row, column and 3x3 box in the grid.
- Killer: Digits within cages do not repeat. A cage's total is given in the top left corner.
- Odd cells: cages with a grey circle contain odd digits.
- Modified entropy rule: Digits that have a multiple of 3 as difference belong to the same group. So there are three groups: {1,4,7}, {2,5,8} and {3,6,9} (residues modulo 3). In every 2x2 square of the grid there is at least one digit of each group.
Link to this puzzle in CTC app
Solution code: Row 4 followed by column 5 (18 digits, no spaces)
Comments
on 27. April 2023, 09:38 by Mr.CHEN
A Chinese solve video(SPOILER ALERT):https://b23.tv/C4HdMQY
on 10. November 2022, 01:23 by Krokant
Indeed a quite different kind of entropy. The break-in was fun. Nice puzzle. :)
on 14. March 2022, 13:22 by BellBear
Added entropy tag
on 7. January 2022, 09:52 by BellBear
Labels adjusted
on 5. January 2022, 18:05 by SudokuExplorer
Nice break-in and very smooth solve afterwards, thanks! :-)
on 5. January 2022, 14:12 by Elliott810
What a wonderful construction! A masterclass in residue classes. Thx:)
on 5. January 2022, 11:30 by BellBear
Just corrected a typo.
on 5. January 2022, 11:07 by Mad-Tyas
Very nice different kind of entropy! I'm glad my idea inspired you to create this. Thank you for the puzzle.
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Thank you!
