Originally posted by Jusuh well if it is white to play he has to play bxa-pawn:
1.bxa b6 2.axb cxb f5 black stalemated and wins?
Edit: oh I missed en passant!! well the it is too hard for me
Yes, e.p. is possible, because Black's last move had to be ...a7-a5. It could not have been ...a7-a6?? because he would have been obligated to take the b-pawn.