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Yajilin (Regions) (740)
Other names: Regional yajilin
Instruction:
Shade some cells so that you can draw a single closed loop (without intersections or crossings) through all remaining unshaded cells. Loop paths must be orthogonal. Shaded cells cannot share an edge with each other. 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. Numbered cells may be shaded. The number of shaded cells for a region without a number is for you to determine.