1. Base
Normal Sudoku rules apply.
2. Thermometers
Digits on a thermometer must strictly increase from the bulb to the tip.
More Thermometer Sudoku puzzles
This puzzle appears as puzzle #121 in my book
128 Handcrafted Thermometer Sudoku.
If you enjoyed solving it, you'll find
127 more handcrafted Thermometer puzzles
in the full volume, ranging from
beginner-friendly introductions to
expert-level challenges.
Solution code: Digits in row 3 (left to right).
on 21. July 2026, 14:21 by Adrian Klausen
- Fixed Layout structure on the site
on 10. July 2026, 22:06 by Adrian Klausen
- Fixed Resolution Scaling Issue on the page
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