Preparing ...Nd7-c5 with a clear advantage. Evidently the dark-squared bishop is missing in the white camp.
Exchanging the defender on g7 as a first step to an attack on Black's king.
1...Nd7 2.Qg5 Rxc1 3.Rxc1 Bxh6 4.Qxh6 Rxc8 5.Rxc8+ Nxc8 6.h5! Qd8 7.Ng5 Nf8 8.Be4!!
Thanks to the previous sacrifice, the knight reaches the square it was dreaming about: f6.
1...Nxe4 2.Rxe4 Rxe4 3.Qxe4 Qh6?! 4.Ng5! Bd6 5.h4! Nd7 6.Qf5 Nf6 7.Bxf6 gxf6