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Canal View (213)
Instruction:
Shade some empty cells; cells with diamonds cannot be shaded. All shaded 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 2×2 group of squares can be entirely shaded.
Each number in a diamond indicates the total count of shaded cells connected in line vertically and horizontally to the numbered cell.