1.d3! zugzwang 

1.Bg2? zugzwang 1...Kd7! 

1...Kd5? 2.Kc7 zugzwang 2...Kc5 3.Ra4! (thr: 4.d4 + Kb5 5.Bc6 #) 3...Kb5 4.Bc6+ Kc5 5.d4#

2.Kc5 Kc7! 3.Re7+ Kc8! 4.? 

3...Kd8? 4.Kd6 Kc8 5.Re8# 

1...Kd5 2.Kc7 zugzwang 2...Kc5 3.Bd7 zugzwang 3...Kd5 4.Bc6+ Kc5 5.Rc4#