Binarity
(Published on 28. August 2020, 23:08 by henter)
First attempt at creating a puzzle. Hopefully it's not a total disaster.
Rules
Normal sudoku rules apply
Digits on the thermometer increase from bulb to end
Each horizontal/vertical cage contains a two or three digit number (read from left/top to right/bottom), whose 9-digit binary representation corresponds to the parities of the cells in its row/column (0 is even, 1 is odd).
Example: A horizontal cage contains 91, which is 001011011 in binary. Its row must be even,even,odd,even,odd,odd,even,odd,odd.
Note that such a cage can only start at cell 5 or 8 as 91 consists of two consecutive odd digits.
penpa (with the powers of 2 in the border, thanks to @SudokuExplorer)
sudokupad (Thanks to @sanabas)
Solution code: row 4 column 9
Comments
on 22. July 2025, 23:32 by henter
Added sudokupad link, thanks to @sanabas
on 22. July 2025, 23:23 by sanabas
Fun concept. I'm very used to sudokupad, so I made a version there, rather than use f-puzzles/penpa. https://sudokupad.app/ftsyv00bn8 is the link with solution check.
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Thanks for the sudokupad link. It wasn't really a thing back in 2020 :)
on 31. August 2020, 18:04 by henter
@SudokuExplorer: Appreciate the nice feedback - and the penpa link
on 31. August 2020, 18:00 by henter
added penpa link, thanks to @SudokuExplorer
on 31. August 2020, 17:29 by SudokuExplorer
Lovely puzzle! Well-set puzzle with interesting logic :-)
Those who find converting between binary and decimal a bit tedious might want to solve using this penpa link: https://tinyurl.com/y2hec9qw
It has powers of two around the border.
on 29. August 2020, 10:29 by henter
@sideG: Thanks for your feedback, glad you liked it. A slight tendency to enjoy tormenting yourself with mental arithmetic is certainly required for this mechanic.
on 29. August 2020, 03:06 by sideG
Nice puzzle. A bit tedious with the conversion between binary and decimal, but luckily I enjoy that.
