Four Times the Heat

**Sudoku, Quads, Thermos** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Quadruples: Digits in a Quadruple circle must be placed at least once in the four cells touching that circle. - Thermometers: Digits on thermometers are strictly increasing from bulb to tip. For more of our puzzles, please visit https://missingdeck.net or join our mailing list to get a weekly digest of puzzles: missingdeck.net/mailing