X Marks the Spot
Written on October 28, 2022.
Written on November 4, 2022. Warning: This puzzle is extremely hard.
This puzzle has some special rules: each thermo displayed in the right grid must be placed in a unique subgrid on the left grid. Moreover, the position of each thermo must not change with respect to its subgrid (meaning no rotation or translation within the subgrid).
Written on December 3, 2022.
The line is a German Whisper. As far as I know, F-Puzzles does not have an option to create a German Whisper, so it does not have any error checking. (Penpa does not either, and placing XV’s is annoying, so I opted to use F-Puzzles instead.)