Chess puzzle #52: the bishop can’t do everything

I have to confess that when solving chess puzzles I have the tendency to jump right in. In that way chess becomes a process of trial and error. With quite a lot of errors of course!

I think I can do better. Bit by bit I try to change my bad habits. One of the first things I do now is have a good look at the position. Are there any pieces en prise? What do the pawn formations tell me? Are there any threats? Can I find a motif? Are there any patterns?

If I look in this way generally things get a bit more easy. The motif in the diagram position is clear. White’s pieces are a somewhat “loose”. How can black use this motif to his own advantage? Solution…