Correct answer: Qb11...Rcc3/Ra3/Rbc3/Rd3/Re3 2.Be3# 1...Rc2/Rb2 2.Bd2# 1...Rc1/Rb1 2.B:c1# 1...Rc5/Rbb4/Rb5 2.B:h4#/Bh6#/B