It’s Your Move: daily chess puzzle #278

Black to play and win

Naranja v Portisch, Siegen Olympiad 1970

Solution

After yesterday’s failure, today’s was better: 1..b5! is an obvious biff, and if 2 Bb5 Rab8 wins some material; so 2 Bd3 when 2…Qb4+! is a nice win of piece.