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Canal View (Anti-clone) (1216)
Instruction:
Shade some empty cells; cells with octagons 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 cells can be entirely shaded.
Each number in an octagon indicates the total count of shaded cells connected in line vertically and horizontally to the numbered cell.
The two outlined regions match in shape and orientation. If a cell in one region is shaded, then the matching cell in the other region must be unshaded. If a cell is one region is unshaded, then the matching cell in the other region must be shaded.