This sudoku advent calendar contains 24 variants that were included in my Sudoku Variants Series (SVS) but turned out to be too hard to be solved by a wide range of puzzlers. I aim for difficulties of 1-2 stars and have written some general and/or specific hints as well. I hope some players will try the original SVS puzzle after solving the advent version.
Odd-Even Thermometers
Specific hint for this puzzle:
The digits on the two thermometers of length four in box 7 and 8 cannot have the same parity because of the position of the second halves of the thermometers. Therefor the two digits of R9C45 have to go in R78C1. None of these can be 1 or 2.
Apply classic sudoku rules.
The digits in each thermometer are, from the bulb to the end, all different and placed in increasing order. Digits in a thermometer are either all even, or all odd.
Solution code: Row 3
today, 13:52 by Klausku
Lovely puzzle with a nice break-in. Took me a while to find it. Thanks
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Reply: there is a hint provided. If you want to, you can see it by clicking on it...
today, 13:46 by Franjo
I already had solved the original, but didn’t remember… So I stared at the grid for twenty minutes until I suddenly realized how and where to begin. So smooth! Thank you very much for creating and sharing this lovely puzzle.
today, 11:50 by Richard
Thanks for the solve JVA!
today, 10:29 by JoeyJoeJoe
00:45:47 for me
today, 10:22 by faltenin
Really nice. I'm enjoying the series!
today, 10:01 by JVA
No solution checking :(
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Reply: you can check your answer by entering the solution code here. :)
today, 07:08 by Piatato
Super smooth, thanks!