Correct answer: O-O-O1...Ra8/Rc8/Rd8/Re8/Rf8/Rg8/Rh8 2.N:b7# 1...b:c6 2.b7# 1.Bf1?? zz 1...Ra8/Rc8/Rd8/Rf8/Rg8/Rh8 2.N:b7#
