Logic Masters Deutschland e.V.

Normal sudoku rules apply. Even: grey squares must contain an even digit. Odd: grey circles must contain an odd digit. Maximum: cells with a square that has arrows pointing outwards have a digit greater than the 4 adjacent cells. Minimum: cells with a square that has arrows pointing inwards have a digit smaller than the 4 adjacent cells. Kropki: digits separated by a white dot are consecutive; digits separated by a black dot are in an 1:2 ratio (i.e. one digit is double the other). German whispers: adjacent digits on a green line must differ by at least 5. Quadruplets: every digit in a circle must be assigned to one of the four surrounding cells. Killer cages: digits in a killer cage must sum to the number in the top left corner. Arrow: the digits along the arrow must sum to the number in the circled cells.

Solve online here: SudokuPad Puzzle

If you like this puzzle you may enjoy some of my other puzzles too, click HERE to see the other puzzles I have made.