Correct answer: Nd3-c51.Nd3-f2? ~ 2.Rc2-d2# 1...Rg6-g2 2.Rc2-c4# 1...Rg6-c6 2.Bh6-g7# 1...a2-a1=R ! 1.Nd3-c5! ~ 2.Rc2-c4# 1...Rg6-g2 2.B