Lil' Thermos
(Eingestellt am 30. August 2020, 06:46 Uhr von smrq)
A thermo sudoku with only one thermo longer than 4 cells. Can you spot the opening trick?
Rules:
- Normal sudoku rules apply.
- Along thermometers, digits must increase from the bulb end.
Link to puzzle (f-puzzles.com)
Lösungscode: Row 6, followed by column 4.
Kommentare
am 31. August 2020, 12:22 Uhr von stefliew
Ah, but Box 7 could be ambiguous. People who are not familiar with the way thermos are drawn in f-puzzles wouldn't know whether R8C2 > R8C3 or R8C2 < R8C3. If you imagine that there's no bulb on R9C3, it could very well be a thermo that starts on R8C1 and branches out three ways from R8C2. The only way to differentiate that is to observe whether R8C3 is rounded or not, but that's not ideal.
[smrq] Personally, I disagree that that's a valid way of reading an intersecting thermometer; if a cell doesn't contain a visible tail, then I don't think it can be seen as the end. I would draw the configuration you describe with two non-intersecting tails in R8C3. (If you were to set that up in F-Puzzles, the tails overlap in a way which I would say is invalid, because it makes it look like this case.)
That said, I've uploaded a new image that hopefully everyone can agree is unambiguous. (The version on f-puzzles naturally can't be changed in the same way.)
am 30. August 2020, 22:38 Uhr von SKORP17
jetzt verstehe ich auch die Thermometer in box 3 und 7
am 30. August 2020, 12:16 Uhr von uvo
It is ambiguous, but does it really matter? Either way, you get four inequalities:
R8C2 > R8C1, R8C2 > R8C3, R8C2 < R7C2, R8C2 < R9C2
and similar for the top right box.
am 30. August 2020, 12:06 Uhr von Savia
What cells do the overlapping thermometers in boxes 3 and 7 go into? It is ambiguous.
[smrq] It's not really ambiguous because the answer is really "both". Every thermometer path you can draw from a bulb to a tip must follow the constraint. This is the case for any puzzle with intersecting thermometers; I believe only loops introduce a potential ambiguity.
