Sudoku Variants Series (351) - Double Trouble Killer Sudoku
(Published on 15. December 2021, 00:00 by Richard)
Double Trouble Killer Sudoku
Inspiration for this type comes from Mad-Tyas: Easy, Medium, Hard.
Solve online in F-Puzzles (thanks Mad-Tyas!) or in Penpa+ (thanks henrypijames!)
Apply classic sudoku rules.
The small numbers in the upper left corner of each cage (dotted outlined region) indicate the sum of the digits in that cage. Digits in cells with a diamond have to be counted double. Within each cage all digits must be different.
Solution code: Row 1, folowed by column 8.
Comments
on 13. July 2022, 15:41 by Crissu2
The number 74 is wrong - correct is the number 78
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Reply: having a sum of 33 higher than the maximum of 45 isn't possible with only four diamonds. So 74 is the correct sum. :-)
on 15. December 2021, 17:54 by Gullie
Nice concept, the break in was very elegant and the rest of the solve flowed very naturally from that. Managed to solve it in under 25 minutes, which is a personal best I think for a 3-star puzzle :-)
on 15. December 2021, 13:08 by Richard
Fixed link to F-Puzzles. Thx for mentioning and repairing!
on 15. December 2021, 13:07 by marcmees
tough entry, but smooth solving after that. thanks for an other great puzzle, Richard.
Great lay out of the diamonds, perfect copycat of the original M-T puzzle style.
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Reply: My idea for the lay-out of the diamonds was in fact inspired by SVS #344 Lockout Lines; at first I wasn't aware that there were three DTK's (someone recommended the type to me with a link to only the easy DTK). Only after creating my own DTK, I found out there were two more, with one having also the diamond-theme in the placed diamonds.
But I decided not to adjust my puzzle, since it has a totally different solve. And that's what counts! :-)
@Richard. I agree with that bottom line and hope you know I did not mention that as a critic ... on the contrary, I think it is a nice tribute to an other author.
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To be honest; I had at least my doubts interpreting your words. Even looked up 'copycat' in the dictionary. The tone of voice of that word seemed negative to me. But if it's meant otherway: thanks!
on 15. December 2021, 12:35 by Mad-Tyas
New f-puzzles link:
https://f-puzzles.com/?id=y4rw3quw
Sorry. I didn't notice I copied the german rule description.
on 15. December 2021, 12:04 by geronimo92
There is a wrogn white diamond in R6C8 in the f-puzzle link, and instructions on the left are in german....
on 15. December 2021, 05:46 by Richard
Added links for online solving. Thx Henry and Mad-Tyas!
on 15. December 2021, 03:42 by henrypijames
Penpa+: https://git.io/JDuEX
Couldn't find an elegant path through mid-game, 4 stars difficulty for me (and another reinforcement for my strong dislike of killer sudokus).
on 15. December 2021, 00:36 by Mad-Tyas
I feel honored that my Double Trouble idea has made it to this incredible list of variants. I have to say that the idea of double counted digits existed before I started my series, but without my knowledge.
Thank you very much for setting this puzzle, Richard! It's beautifully designed and was a great pleasure to solve.
