Diagrams will be easier to discuss if they are numbered, or at least have more concise labels.

Oh, unrelated to that: you use the word "destroyed", but then the following move, show black defending the square. The word destroyed carries with it a connotation of semi-permanence - which (to me) doesn't seem to apply here since the very next move it suddenly isn't destroyed any more. Perhaps a better word in this case would "threaten", since an immediate defense is possible.

I have changed the word "destroy" into "prevent"