Heat Flow
(Published on 8. November 2022, 09:18 by Mad-Tyas)
Sudoku: Fill every row, column and 3x3 box with the digits 1-9.
Thermometer: Digits along a thermometer have to strictly increase from the bulb to the tip.
Entropy: The low digits (1, 2, 3), middle digits (4, 5, 6) and high digits (7, 8, 9) are defined as three different groups. In the finished grid each 2x2 box has to contain at least one digit of each group.
Have fun solving!
Solution code: Row 9 followed by column 9 (18 digits)
Comments
on 23. November 2022, 04:29 by snoswal
I love how these constraints combine! Thank you for making such a wonderful puzzle!
on 9. November 2022, 23:39 by Krokant
I really enjoy the entropy cpnstraint when it applies to the entire puzzle. That was not easy, but a lot of fun. :)
on 9. November 2022, 18:34 by m0rkoli
I think it took more time to complete this, than it should... Well more time to enjoy this wonderful puzzle!
on 8. November 2022, 21:24 by Raumplaner
This one was quite challenging for me - but super rewarding to figure it out in the end. Another great Entropy puzzle!
on 8. November 2022, 19:03 by apendleton
I love these entropy-grid puzzles! They seem to exercise a part of my brain that other sudokus don't.
-Reply: I'm very pleased to read, that you enjoy the constraint.
Dividing the grid into three groups ro fulfill the constraint is like an own puzzle type.
on 8. November 2022, 16:58 by Snookerfan
Great puzzle, I find these 2 x 2 entropy puzzles always very hard, but also very rewarding. I hope to discover more basic logic to apply to them in the future, so it becomes a little bit easier. Thank you!
-Reply: Thank you for your comment! Always a pleasure to read that someone enjoys the constraint. It's much about recognizing certain patterns and learning what they force.
With some practice some steps will become natural and can be applied in every entropy puzzle.
on 8. November 2022, 14:10 by OutOfMyMindBRB
That was very enjoyable - great puzzle, as usual - thanks :-)
-Reply: Thank you for your kind comment! I'm glad you enjoyed the puzzle :-)
