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.

Cells separated by a knight's move (in chess) cannot contain the same digit.

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

Digits along the blue diagonal line must be different.

Digits in a gray circle must be odd, Digits in a gray square must be even.

Uncertain Arrows puzzle