Correct answer: Ke31...g2 2.B:f2# 1.Kd1?? (2.Rc2#) but 1...b3! 1.Ke1?? (2.Rc2#) but 1...b3! 1.Kc1?? (2.Rc2#) but 1...b3! 1.R:f2?? (2.Rf1#/Rf3#/Rf4#
