Logic Masters Deutschland e.V.

Rules:

1. Normal sudoku rules apply.

2. Kropki dots: Digits in cells joined by a white dot are consecutive. Digits in cells joined by a black dot are in a 1:2 ratio.

3. Palindrome: Digits along a grey line read the same in both directions.

4. Little killer: A clue outside the grid gives the sum of the digits along the indicated diagonal.

5. Killer: Digits in a cage sum to the clue in the top left corner of the cage.