Thematic try: 1.Sd6? Rb4!, also 1.Bg5? Rf7!; 1.Bc5? Rb1!
Solution: 1.Rh4 Sg3 2.Rhh1 Sxh1 3.Sd6 Rb4 4.Bf6 Rc7 5.Bc4 Rbxc4 6.Bc3+ Rxc3 7.Se4# 5...Rcxc4 6.Se4+ Rxe4 7.Bc3#
An extended Plachutta, with a double diversion of the knight via a rook sacrifice - once to divert it from f6, preventing Bf6 and then to divert it from g3, where it exercises control over e4, preventing Sd6.
The black defense to Sd6 is the same after the foreplan has been executed, only we have introduced new weaknesses that render the black defense ineffective.
