Logic Masters Deutschland e.V.

• Normal Sudoku rules: Place the digits 1-6 in each row, column and box, without repetitions.
• Doublers: There is one doubler in each row, column and box. Every digit gets doubled once. The value of a cell with a doubler is twice the digit placed in that cell.

Doppelpunkt

• Kropki dots: On a white dot values differ by 1, on a black dot one value is double the other. Not all dots are necessarily given.

Remote Doublers

• Remote Sums: A value X in a cage points to a second value Y located X cells away from the cage vertically or horizontally. The number in the top left corner of a cage indicates the sum of X+Y. E.g. if the value in r1c4 is 5, there must be a value "3" in a place 5 cells away (3+5=8), which can only be r6c4 in this case.

Hand in Hand

• German Whispers: Adjacent values on a green line must differ by at least 3.

Framed Triple

• Killer Cages: Digits in cages may not repeat. Values in cages sum to the indicated total.