## Double Negative (Kropki Broken 159)

(Eingestellt am 18. Dezember 2021, 19:02 Uhr von tallcat)

Continuing to mix and match constraints with broken 159. I was aiming for a minimalist puzzle here, and it turned out nicely while still not being monstrously difficult. Happy solving!!

Normal Sudoku rules apply

Kropki: Cells separated by a black dot have a ratio of 1:2. ALL possible black dots are given.

Broken 159: Digits in red-shaded cells in column 1 indicate the position of 1 in the corresponding row. The same is true in columns 5 and 9 for 5's and 9's respectively. ALL possible red cells in columns 1,5,9 are given

Can be found at f-puzzles or CTC

I was also lucky to have Bremster feature a solve video for this puzzle on his Youtube channel. You can find that here

Lösungscode: Row 8 (Left to right) followed by Column 7 (top to bottom). 18 digits, no spaces.

Zuletzt geändert am 19. Dezember 2021, 13:01 Uhr

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### Kommentare

am 20. Dezember 2021, 16:15 Uhr von pwfd
Love the broken 159 ruleset so far, this was another great one!

am 19. Dezember 2021, 13:01 Uhr von tallcat
Clarification of rules

Zuletzt geändert am 19. Dezember 2021, 10:32 Uhr

am 19. Dezember 2021, 09:02 Uhr von henrypijames
When you say "ALL possible red cells are given", you mean all possible red cells in columns 159, right? For example, there must be a 2 in C2, which would be self-indexing and therefore red.

Zuletzt geändert am 18. Dezember 2021, 21:33 Uhr

am 18. Dezember 2021, 21:33 Uhr von Playmaker6174
Very smooth and enjoyable solve! :)

Zuletzt geändert am 18. Dezember 2021, 20:42 Uhr

am 18. Dezember 2021, 20:31 Uhr von fpac
does the negative constraint apply to only col 159 or all columns?

edit: nvm. i figured it out