Logic Masters Deutschland e.V.

Normal sudoku rules apply: place the digits 1 to 9 in every row, column, and 3x3 box.

Anti-knight: Cells separated by a knight’s move (in chess) may not contain the same digit.

German whispers: Adjacent digits along a green line differ by at least 5.

Killer: Digits in a cage sum to the small clue in the cage's top-left corner. Digits may not repeat within a cage.

Renban: Pink lines contain a set of non-repeating consecutive digits in any order.

Palindromes: Grey lines read the same forwards and backwards.

Region sum lines: Blue lines have the same sum in each box they pass through.

Solve online in SudokuPad.