[1.Nd5 Nxd5 2.exd5 If White hurries to occupy the weak square d5 with the Knight, after the exchange of Knights he will have lost the chance to create a strong point there. Better is to prepare this capture first.]
Black intends to start a pawn attack on the Queen side.
1...Qc7
2.Ned5
Nxd5
3.Nxd5
Qc6
White's knight has now secured himself a strong, strategically important point, a so-called outpost.
4.Ne7+
Kh8
5.Nxc6
Rxc6