Featured Puzzle: Heyawake #1

Shade cells in each region equal to the number given. If a region has no number, it may have any number of shaded cells, including zero. The remaining unshaded cells must form a single orthogonally contiguous area.

• A straight line of unshaded cells may not cross more than 2 regions. (i.e., it may cross at most one boundary)
• Shaded cells may not be orthogonally adjacent to each other. Diagonal adjacency is permitted.