Slow Thermometer Sudoku
The rule: Along each slow thermometer, digits never decrease from the bulb. Repeats are allowed.
Play unlimited Slow Thermometer puzzles free — every one generated with a unique solution, rated by the solving techniques it actually needs.
- Four difficulties, from gentle to expert
- Step-by-step hints that teach, not just tell
- Interactive lessons and a daily race
- Make and share your own puzzles