Logic Masters Deutschland e.V.

Normal Sudoku rules apply:Place the digits 1 to 9 once each in each row, column, and box.

Double Parity Arrows: Digits on a line between two circles sum to the sum of the digits in the circles. The parity of digits on double parity arrows (including both lines and circles) alternates as you proceed along the line. For example if one circle is even, the first digit on the line touching the circle will be odd, and the next digit on the line even and so on.

Parity Clues: Clues outside the grid on the right and bottom of the grid in the form a x b show the largest run of adjacent digits of the same parity in that row or column and the number of times that run occurs. For example a clue 3x2 on a column means the largest run of digits of same parity in the column is 3 and that this occurs twice in that column.

X Sums: Clues outside the grid on the left and top of the grid show the sum of the first X digits in that row or column, where X is the first digit seen.