Logic Masters Deutschland e.V.

Berlin Wall

Rules:

Normal Sudoku rules apply.

German Whisper: Adjacent digits along a green line have a difference of at least 5.

Green Circles: A digit in a green circle equals the maximum possible length, in cells, of a German Whisper line starting in that cell and moving orthogonally, without crossing a thick brown wall.

Note: The circled cell must be the starting point of the line, so it must be an endpoint, not a middle cell, and it may not be revisited as part of a loop, since that would create an infinite loop. If the line cannot extend beyond the circled cell, its length is 1.

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Happy solving!