Divide the grid into regions, each consisting of nine orthogonally connected cells. Each row, column and region must contain the digits 1 to 9 once each. Shade some cells so the following conditions are all fulfilled: All shaded cells are connected; all unshaded cells are connected; no 2x2 area is fully shaded or fully unshaded; and each region is either fully shaded or fully unshaded. The digit in a cell with one or more arrows is equal to the total number of shaded cells that appear in the indicated directions combined (not including the arrow cell itself). Not all possible arrows/arrow combinations are given.