Fake Thermometer
(Published on 23. April 2026, 03:04 by Leaving Leaves)
Normal 9x9 Sudoku rules apply.
Thermometer: Digits on thermometers must strictly increase from bulb to tip.
Palindrome: Palindrome lines read the same in both directions.
Odd circle: A digit in a grey circle must be odd.
Each "thermometer" here is either real or fake. When it's real, it follows the thermometer rule. When it's fake, it contains a palindrome line and a grey odd circle, and therefore follows the palindrome and odd circle rules. Players need to distinguish whether the thermometer is real or fake by themselves.
Click or tap the following image to play!
Solution code: Row 9
Comments
on 23. April 2026, 20:53 by sourcedecay
I think the ruleset is ambiguous re the fake thermometers. Are you saying (a) a grey odd circle followed by a palindrome such that 5-1-2-8-8-2-1 would be a possible solution, or (b) a grey odd circle, which is one end of the palindrome such that 5-2-8-8-2-5 would be a possible solution? Or is it intended to be ambiguous such that both are possible?
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It's the latter. Since the palindrome line does enter the cell with circle, it must be a part of the palindrome.
