Logic Masters Deutschland e.V.

This one has now had a refurbishment to preserve break-in logic. Thank you to all of those who tested, and happy solving!

Puzzle: Cagey Doppelgängers

Rules:

Normal 9x9 Sudoku rules apply.

Digits cannot repeat along the marked negative diagonal.

Quadruples: Digits in circles must appear in at least one of the surrounding 4 cells.

Cages: Cages are either killer cages, where the digits do not repeat and sum to the clue, or Look-and-say cages where the clue indicates how many times the digit appears in the cage. I.e a 14 means there is one 4 in the cage. Digits can repeat in look-and-say cages.

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