Logic Masters Deutschland e.V.

Standard Variant Rules:

1. Anti-Knight: cells separated by a knight's move cannot contain the same digit

2. Sandwich: the number outside the grid indicates the sum of digits between the 1 and the 9.

3. Arrows: digits on the arrows must sum to the circled number

4. Kropki: cells separated by a white dot are consecutive. Cells separated by a black dot have a ratio of 1:2. (not all possible dots are given)

5. Killer cages: digits in cages must sum to the value in the left corner. Digits may not repeat in a cage.

6. Normal Sudoku rules apply

As always, welcome any feedback particularly on the difficulty level :)

F-puzzles link