Odd/Even Thermo Sudoku
(Published on 13. July 2020, 17:17 by Willy Wonka)
This puzzle adds a new constraint to the familiar variant of thermometer sudoku.
Rules:
Normal sudoku rules apply. Every row, column and box must contain the digits from 1-9.
Normal thermometer rules apply. Digits must strictly increase along a thermometer, starting from the bulb end.
Additionally, each thermometer contains either all odd or all even numbers.
Solution code: Rows 3 and 7
Comments
on 28. April 2024, 03:49 by Willy Wonka
Updated online solving links
on 10. January 2023, 07:02 by Ryx
What a tough puzzle (for me). I had to restart many times, not sure where I kept going astray. But glad I had observed it and someone else solved it recently, so it prodded my to have another go at it ... and success!
Great puzzle, thank you for setting it!
on 14. July 2020, 04:48 by Willy Wonka
Minor clarification of note..
on 14. July 2020, 04:47 by Willy Wonka
Added note regarding negative constraints. Cheers @RockyRoer and @Ryx
on 14. July 2020, 04:38 by RockyRoer
@Ryx:
No, there is not a negative constraint
on 14. July 2020, 03:27 by Ryx
Is there a negative constraint as well? If I find a 7-9 thermometer, does that mean the cell ahead of the 7 cannot be a 5?
I assume no negative constraint here, I was just hoping to rule out more possibilities ;-)
on 13. July 2020, 22:14 by RockyRoer
I really enjoyed this puzzle too. I like puzzles where you have to 'shade' the squares before filling them in -- in this case odd or even.
on 13. July 2020, 18:46 by Jesper
I really liked the puzzle. I would say 3 to 4 stars difficulty. Based on the time I needed for the solve, it would rather be 3 stars. But it could be that I was just lucky to spot some things right away.
