Logic Masters Deutschland e.V.

Normal killer cage rules apply.

In the grid at least two of the 3x3 boxes have the following constraints on their digits:

- cannot be orthogonal to consecutive numbers

- cannot be orthogonal to numbers in a ratio 1:2

- cannot be orthogonal to numbers with a difference of 3

- these rules apply to all of a digits neighbours, including those outside the box (example below the grid if needed)

- it is your job to determine how many of these boxes there are and where they are

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Hint below the puzzle if needed

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Link to CtC app: https://tinyurl.com/2p99zsjz

Link to F-puzzles: https://f-puzzles.com/?id=y8gvwqhc

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EXAMPLE: If it was determined that box 1 was a specially constrained box, and that R1C3 was a 6, then R1C2, R1C4, and R2C3 could not be a 5 or 7 (consecutive), 3 (1:2 ratio and difference of 3), or 9 (difference of 3).

NOTE: in this example, R1C4 is constrained with regard to that neighbour, but not necessarily its other neighbours because it is outside box 1.

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HINT 1: Consider what the possible arrangements of a constrained box are, you should be able to limit five cells in a constrained box to either a specific digit or two digits.

HINT 2: Using the known details of a constrained box's arrangement, you can determine which specific boxes are constrained.

Link to solution path if needed: https://youtu.be/T4PU0hSGeJk