Set Play:

 1. ... d5 2. Qxe5#

 1. ... e4 [a]  2. Qf4 [A] #

Try: 1. Bd7? waiting

 1. ... d5 2. Qxe5#

 1. ... e4 [a]  2. Qf4 [A] #

  But 1. ... Sf7 [b] !

Try: 1. Be6? waiting

 1. ... e4 [a]  2. Qf4 [A] #

  But 1. ... d5!

Try: 1. Bf5? waiting

 1. ... d5 2. Qxe5#

 But 1. ... Kxf5!

Try: 1. Bh3? waiting

 1. ... d5 2. Qxe5#

 1. ... e4 [a]  2. Qf4 [A] #

 1. ... Sf7 [b] /h7 [b] /e6 [b] /e4 [b] /f3 [b]  2. R(x)e6 [B] #

  But 1. ... Sxh3 [c] !

Try: 1. Bb7? waiting

 1. ... d5 2. Qxe5#

 1. ... e4 [a]  2. Qf4 [A] #

  But 1. ... Kf5!

Solution: 

 1. Bg4! waiting

 1. ... d5 2. Qxe5#

 1. ... e4 [a]  2. Qf4 [A] #

 1. ... Sf7 [b] /h7 [b] /e6 [b] /e4 [b] /f3 [b] /h3 [c]  2. R(x)e6 [B] #

Белая коррекция на фоне премены матов.