Quadrentropy
(Published on 22. October 2024, 02:59 by timotab)
- Normal Sudoku rules apply: place the digits 1 to 9 in every row, column, and box, once each.
- A digit inside a white circle must appear in one of the four cells surrounding that circle.
- Every 2x2 square must contain a low digit (1, 2, 3), a middle digit (4, 5, 6), and a high digit (7, 8, 9)
Solution code: Row 6
Comments
on 20. February 2025, 19:25 by Friedhelm
That was fun! Thanks!
on 31. January 2025, 03:07 by Frank Puzzles
https://youtu.be/Fpd9nUCeeIU
I highlight this puzzle in my new series Learn How To Sudoku. Nice introduction to entropy ruleset and quad circles.
on 7. January 2025, 15:54 by ParaNox
I LOVE entropy puzzles, I just often have a hard time finding some which aren't too hard for me to solve, so this was perfect, thanks a lot!
on 8. November 2024, 05:47 by PatMac
Very fun solve.
on 24. October 2024, 22:47 by zimmicks
Just under an hour, got stuck in the middle. Very fast solve after key found.
Fun solve!
on 24. October 2024, 18:52 by chain.reader
Loved it. thanks
on 24. October 2024, 07:42 by Ganbatte
Simple rule set and fun puzzle to solve. Thank you!
on 24. October 2024, 01:55 by inthemoonlight
Such a delightful solve!
on 22. October 2024, 18:39 by Franjo
Nice and easy entropy. Thank you for sharing.
on 22. October 2024, 16:28 by Inge
Very nice puzzle !
on 22. October 2024, 16:19 by PinkNickels
Very lovely solve!
