1. All shaded cells are orthogonally connected.
2. No 2x2 block of cells is entirely shaded.
3. Numbers indicate the length of consecutive shaded blocks in the 8 neighbouring cells. (For instance, a "2 2 1" clue indicates that in the 8 cells surrounding the clue, there is a block of 2 consecutive shaded cells, a block of 2 consecutive shaded cells, and a block of 1 consecutive shaded cell, with blocks being separated from each other by empty cells.)
Below is an example and its answer.