The Rule of 45 of Killer Sudoku (innies and outies)

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Descrição

This tip is probably the most important solving technique of Killer Sudoku, one that will save you a lot of time. It does involve some math, but very simple one. Basically, the whole story is that …
The Rule of 45 of Killer Sudoku (innies and outies)
What am I missing here? I've applied all the rules I know in killer sudoku including both versions of the 45 rule. But regardless I'm still missing something. Probably something obvious, but
The Rule of 45 of Killer Sudoku (innies and outies)
Killer Sudoku Rules
The Rule of 45 of Killer Sudoku (innies and outies)
The Rule of 45 of Killer Sudoku (innies and outies)
The Rule of 45 of Killer Sudoku (innies and outies)
The Law of Leftovers (LOL)
The Rule of 45 of Killer Sudoku (innies and outies)
45 rule - Sudopedia
The Rule of 45 of Killer Sudoku (innies and outies)
How does this work? : r/sudoku
The Rule of 45 of Killer Sudoku (innies and outies)
The Law of Leftovers (LOL)
The Rule of 45 of Killer Sudoku (innies and outies)
Klein aber Fies: Jigsaw Killer — Rätselportal — Logic Masters Deutschland
The Rule of 45 of Killer Sudoku (innies and outies)
JSudoku - Innies/Outies Techniques
The Rule of 45 of Killer Sudoku (innies and outies)
JSudoku - Innies/Outies Techniques
The Rule of 45 of Killer Sudoku (innies and outies)
Nate Dorward II - Sudopedia
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