this is a suckish puzzle,2 Kb5 would of also won Bb7 too, too many possibilities to win, and you call this hard??????????????????????????????/

 You don't get it- it's hard because you would think that white's pawn was going the other way which is a draw.

Exactly Right! If White's pawn moves down it's more of a challenge, so it seems.

than it isn't exactly a puzzle

 Kb5 kxa2 same with Bg7+