Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply.

Arrow sudoku: The digits along an arrow sum to the number in the circle at its base.

In this puzzle, all arrows point in a straight line. The direction of each arrow is shown by a grey line segment. The length of the arrow is equal to the number directly 'behind' the circle: i.e. the square one step from the circle in the opposite direction of the arrow. The length of an arrow does not include the circle.

For example: If the digit in R5C5 were a 3, the arrow starting in R6C4 would be of length 3, covering R7C3, R8C2 and R9C1.

Play online:

F-puzzles

CtC

I think it's anywhere between 1 and 3 stars, depending on how intuitive you find the rule. Please let me know if the explanation is unclear!