Three Coloring
(Published on 20. January 2023, 16:00 by Blobz)
Normal sudoku rules apply.
Cells marked with grey circles contain odd digits. Cells marked with grey squares contain even digits.
The indicated 60-cell white region contains one each of the twelve standard pentominoes (no repeats by rotation or reflection).
Each pentomino encloses exactly one grey square, one grey circle, and one caged cell.
The arrangement of pentominoes must be deduced.
Once placed, the pentominoes can be shaded with just 3 colors, such that no two pentominoes of the same color touch each other orthogonally or diagonally. All pentominoes of the same color contain a digit in common that lives in the caged cell. For one group the digit is 7, the next group 8, and the last group 9.
Additionally, each pentomino behaves like a 5-cell killer cage: digits do not repeat and must sum to the value shown in the corner of the caged cell.
Have fun, leave a comment if you enjoy the puzzle!
- Cloned Pentominoes
- Cloned Pent Redux
- Pentomino Sight Lines
- Sight Lines Redux
- 17 Pentominoes
- Patchwork Pumpkin
- Pentomino Loop
- Pentomino Loop Redux
- 11 Pentominoes
- Three Coloring
- Magic Killer Pentominoes
- Skeleton Pentominoes
- Tricolor Arrows
- Patchwork Pentominoes
- Skeleton Pentominoes #2
- Hidden Necklace
- Skeleton Sight
- Whispering Pentominoes
- 18 Pentominoes
Solution code: Row 3 followed by Column 3
Comments
on 26. November 2023, 09:43 by AaronB
What a gorgeous puzzle! Each stage feels distinct but they fit together beautifully.
on 30. July 2023, 22:34 by TomSudo
Enjoyed the puzzle very much.
on 26. January 2023, 05:43 by KyleBaran
Been looking for an approachable pentomino puzzle, this looks fun
on 21. January 2023, 23:20 by RoboTurtle
Was really fun, thanks for the creation :)
on 21. January 2023, 07:14 by thrutch
Thank-you Blobz for another corker! I spent 1/3 of the time placing and colouring the pentominoes, and 2/3 of the time on the sudoku. Clean and elegant from start to finish.
on 20. January 2023, 23:13 by galium_odoratum
I struggled in the beginning because it wasn't clear for me that you are allowed to use mirrored versions of the displayed pentominos. But after that the puzzle flowed very nicely!
on 20. January 2023, 20:52 by halftime
An interesting concept and enjoyable solve! Really liked how the different rules all came together. I think it was a 2/5 difficulty for me. Thank you for sharing!
on 20. January 2023, 18:05 by alwaysbcoding
great puzzle! was a fun solve throughout. once you get your head wrapped around the ruleset the puzzle doesn't feel particularly difficult, but I loved how cleanly the logic composed from start to finish.
