Logic Masters Deutschland e.V.

Normal sudoku rules apply; i.e. the digits 1 to 9 need to be placed, once each, in every row, column, and 3x3 box.

Digits that are a knight’s move, in chess, away from one another must be different.

The thin blue line is a region sum line. Region borders divide the line into equal sums, i.e. digits that appear on the line sum to the same total in different regions.

Digits in a cage must sum to the number in the top left corner of that cage. Digits can not repeat inside a cage.

Digits along an arrow sum to the digit in that arrow’s circle.

Cells separated by an ‘x’ must sum to 10.

The Knight's plan to slay the Dragon