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Heyawake (38)
Other names: Heyawacky
Instruction:
Shade some cells so that all other cells are connected orthogonally and no two shaded cells share an edge. The grid is divided into regions by thick borders; a number in a region indicates exactly how many cells in that region must be shaded. (Cells with numbers may or may not be shaded.) A group of unshaded cells connected to each other only horizontally or only vertically is called a "word". No word may cross more than one thick border.