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Greater Wall (535)
Instruction:
Shade some 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 2×2 group of squares can be entirely shaded black.
The circles left (or above) the grid are nonogram-like placeholders for the lengths of segments of black cells in that row (or column), in order from left-to-right (or top-to-bottom). Some comparative relationships between adjacent circles are given. Not all rows (or columns) have given circles, but if a row (or column) has circles, then all of its circles are given.