Heyawake Instructions

Rules: The challenge is to shade some cells on the grid, subject to the following rules:

1. Shaded cells must never touch horizontally or vertically
2. Unshaded cells must form one, connected area.
3. Numbers dictate how many shaded cells are in a room, also a straight line of unshaded cells can only connect two rooms i.e. any such line of unshaded cells which connects three or more rooms is forbidden.