Correct answer: Bf71.Qa2?? (2.R:h7#) 1...Rh6 2.R:h6# 1...Rh5+ 2.R:h5# 1...Rh4 2.R:h4# 1...Rh3 2.R:h3# 1...Rh2 2.R:h2# but 1...R:h1!