Thermometer: digits increase, starting from the bulb.
Blue dots link cells with two even digits.
Red dots link cells with two odd digits.
Yellow dots link two cells with one even and one odd digit.
Do you like the (for me new) rule with the colored dots? This is an easy puzzle version to test it. Please leave a comment, and if well-liked, I'll write more (and more challenging) Sudokus with that ruleset.
Sudokupad: Link to Sudokupad
F-Puzzles-Link: F-Puzzles link
PS: if you like this puzzle, please also see my other Sudokus with month names:
Solution code: the bottom row
on 25. September 2026, 09:18 by DulP
00:36:58
on 10. September 2026, 10:57 by Zinker
Very nice puzzle. I am waiting for the next one ;)
on 29. August 2026, 20:24 by lgastako
I like the colored dots rule. I'll have to try setting one with this ruleset myself.
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@Igastako: thanks for your nice words. I'll be happy to solve your puzzle once you've published it :-)
on 3. August 2026, 21:20 by frosto
Very nice relaxing puzzle.
on 2. August 2026, 12:02 by michael_787
Very smooth and easy. A perfect Sunday morning Snack. Thank you!
on 2. August 2026, 03:29 by SanFranSam
I HATE having to look for X-wings ;)
on 2. August 2026, 03:14 by tylerrioux
Thank you this was a very nice puzzle
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