Logic Masters Deutschland e.V.

Normal Sudoku rules apply.

Knight's move constraint- Digits separated by a chess Knight's move must be different.

Positive diagonal- Digits along the marked positive diagonal must be different.

German whispers- Neighbouring digits on a green German whisper line must differ by at least 5.

Killer cage clones- The two cages share the same sum.

Friendly cells- Cells shaded green are Friendly. A friendly cell must contain either its box, row or column number.

Indexes- Red cells are indexes. The number in a red cell is the count to the location of the 5, starting from the red cell and moving towards the opposite side of the grid. For example, if R5C9 contains a 3, count three cells left and place a 5 in R5C7.

Solve at f-puzzles

Solve at CtC