ultima modifica: Sun, 15 Oct 2017 12:25:19 +0200  
I am four pints in, so expect genious. ;-) Black Pawn at D3 can move "safely" to D2, because Bishop at H6 protects the black pawn from white Knight at C4. If black Pawn at D3 reaches D1 it is promoted to officer, Knight, Bishop, Rock or Queen.
  
I think the promotion to officer is the strongest