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Normal sudoku rules apply.

XV - Cells separated by an X sum to 10. Cells separated by a V sum to 5. Not all X's and V's are necessarily given.

Numbered Rooms/Skyscrapers - Clues outside the grid are simultaneously numbered rooms and skyscraper clues.

Numbered Rooms - A digit outside the grid places itself N steps into the grid, where N is the first digit in that direction.

Skyscrapers - A digit outside the grid counts the number of seen digits in that row/column where larger digits obscure the vision of smaller digits.

Thermo - Digits along a thermos strictly increase from the bulb end.

In order for solution check to work, the digits placed on the thermo must be corner marks or small center marks.

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