Logic Masters Deutschland e.V.

Irregular sudoku rules apply. Place the digits 1-6 once each in every row, column, and irregular region.

German whispers: digits along a green line must differ from their neighbours by at least 5.

Renban: digits along a pink line are a set of consecutive non-repeating digits in any order.

Region sum (blue) lines: box borders divide each blue line into segments. All segments on the same line have the same sum; different lines may have different sums.

Palindrome: digits along a grey line read the same forwards and backwards.

Parity line: adjacent digits along a red line alternate between odd and even.

Solve in VariantDoku (iOS, macOS, Android) or on SudokuPad.