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Aqre (1058)
Instruction:
Shade some empty cells black. All black cells connect along edges to create a single connected region. (It is permissible for the region to touch itself at a corner, but touching at a corner does not connect the region.) No 1×4 or 4×1 group of squares can be entirely shaded black. No 1×4 or 4×1 group of squares can be completely unshaded. 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 black. (The location of the number in the region has no significance.)