Logic Masters Deutschland e.V.

Normal Sudoku rules apply.

Echo Lines: Indigo lines are filled with a repeating sequence of different digits. The sequence must appear at least twice along the line and must always appear in its entirety. Different lines may contain different sequences.

Cages: Each cage is either a killer cage or a look-and-say cage. No cage may be both.

Killer Cages: Digits in a killer cage may not repeat and must sum to the given total.

Look-and-Say Cages: Reading the clue one digit at a time gives the partial composition of the cage (i.e. "1223" means the cage contains exactly one 2 and exactly two 3s, in addition to any other digits that may appear). Digits may repeat in look-and-say cages if permitted by other rules.

Kropki Dots: Digits separated by a white dot must be consecutive.

Play on SudokuPad