Correct answer: Ba41...Rb7/Ra8/Rc8/Rd8/Re8/Rf8/Rg8/Rh8 2.N:b7# 1...Rb6 2.Bb4# 1...b4+ 2.Nbc4# 1.a4?? zz 1...Rb7/Ra8/Rc8/Rd8/
