Logic Masters Deutschland e.V.

Rules

Normal sudoku rules apply. Place the digits 1-9 once each in each row, column, and 3x3 box.

Triple Cell Sum Lines: Along a red line, in any three consecutive cells, one digit is the sum of the other two.

Credits

The Triple Cell Sum Line (my name for this line type) appears in puzzles I tested by Jackson Griggs on CTC Discord including "Double Trouble" and "Spot the Difference." curlingclips noted this type of line has appeared earlier and was called a "fibonacci line" while IkeManga mentioned he designed with the same rule and named them "gossip lines." I am unsure of the earliest use.

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