Correct answer: R7g51. R7g5! [2. Q:b4#] 1. ... Bc7+ 2. Q:c7# 1. ... Bd6 2. Q:d6# 1. ... Be5 2. Q:e5# 1. ... R:e6/f5 2. Q(:)f5# 1. ... Rf8+ 2. Q:f8#