Heyawake
Heyawake is one of the Nikoli original puzzle. "Heya" means "room", "wake" means "divide". So, Heyawake means "divide a room".Rules
1. The rectangle, divided by bold lines, is called "Room". Paint cells under following rules.
2. The numbers indicate how many painted cells in this room.
While no number rooms may be any number of painted cells.
3. White cells must not exceed two rooms in a straight line.
4. The painted cells must not be connected. White cells must not be separated by painted cells.