Logic Masters Deutschland e.V.

Normal Sudoku rules apply. Green lines are German whisper lines (ie: adjacent digits must differ by at least 5). Orange lines are Dutch whisper lines (ie: adjacent digits must differ by at least 4). Purple lines are Renban lines (ie: digits must be from a consecutive set). Digits on lines can also be used to position the digit's column in its row. For example, if R9C2 was a 7, then 2 would have to be positioned in R9C7.

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