The answer is for black to play B-d5. White is virtually forced to play Kxd5, then black queens his pawn on h1. If white queens his pawn on a8 he loses to K-f2 check.  Any other move by white instead of queening the pawn and black simply picks up the lone white pawn.
I hope you found the answer. Look for another [...]

Here is another chess endgame puzzle where we’re looking for the winning move.  It’s black to play. See if you can find the correct move. The answer will appear in my next post. 

The answer is for white to play R-c1 check. Black plays K-e2 and white checks again with R-c2, forcing black to take the white rook and allowing white to queen his pawn.  
I hope you found the answer. Look for another new chess puzzle in my next post!