Normal Sudoku rules apply.
Digits along thermometers must increase from their bulb. The grey square in box 4 is an even digit.
Draw a German Whispers line in the grid that forms a single enclosed loop. The line must not cross itself and no cell may be visited twice. It must visit all cells highlighted green. In addition, it must visit Exactly 1 cell along every thermometer, but never the bulb. (A green cell on a thermo counts as that thermo's whisper cell.)
Solve at f-puzzles (Set mode to Setting and use Cosmetic Tools/Line to draw the line.)
Solve at CtC (Note that the CtC pen tool doesn't draw diagonally, so f-puzzles is a bit easier to use.)
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This is the third in a series of hidden whisper puzzles I've built. You can try the others here:
Shhandwich (Sandwich and renban clues)
Kill-o'-the-Whisp (Killer clues)
Lösungscode: All German Whisper digits, no spaces, from rows 3, 6 and 7.
am 9. Januar 2022, 01:21 Uhr von apiyo
I'm glad you all enjoyed! Thanks Henry for the penpa link!
am 8. Januar 2022, 22:58 Uhr von Elliott810
Fascinating and very hard puzzle! So many possibilities to go wrong if not totally focussed. I'm really happy to bring this journey to an end. Thx:)
am 8. Januar 2022, 16:47 Uhr von henrypijames
Penpa+: https://git.io/J9s6P
Hard but not too hard - 4 stars difficulty for me. (Or maybe it's 4 stars solving it on Penpa, but 5 stars otherwise, haha! Because how well pencilmarking works in Penpa.)
am 7. Januar 2022, 21:34 Uhr von apiyo
changed difficulty
am 7. Januar 2022, 18:31 Uhr von ___
this was quite a ride and i enjoyed every minute. also rated it 5 stars for difficulty. thank you apiyo!
am 7. Januar 2022, 15:06 Uhr von SirWoezel
This is as mindbogglingly nasty as it is rewarding! Five stars for difficulty in my world. Thanks for the great puzzle!
am 7. Januar 2022, 09:46 Uhr von apiyo
updated with smaller image