Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Each line is, at the same time, a Dutch Whisper line (i.e. adjacent digits must differ by at least four), a Region Sum line (i.e. is divided by the borders between the boxes to the parts summing up to the same value), and a Modulo 3 line (i.e. each three consecutive digits on the line have three different values modulo 3).

The four digits in the corners of the grid must also produce three different values modulo 3.

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