Place the numbers 1-9 once each in every row and column and region. Regions must be determined by the solver and each consists of nine orthogonally connected cells. Every arrow in the grid corresponds to an “arrow total” in one of the bulbs (ie the digits on that arrow sum to the digit in that arrow’s bulb). Both the arrow and the corresponding bulb have to be in the same region. The direction of the arrow is of no importance.