Once again we depart from our usual 'White to move and mate in two' format to tackle a puzzle from actual play. This one is from an old Soviet championship match that took place in 1950. White has just checked the Black King by moving his Bishop from e2 to h5. This game continued:
1. ... Bf7
2. Bxf7+ Kxf7
3. Bd4
And both players soon agreed to a draw. How instead should Black respond to 1. Bh5+?
No hints on this one, please. Broadest one could unwittingly give it away.