1.c4
e6
2.Nc3
d5
3.d4
Nf6
4.Nf3
Be7
5.Bf4
dxc4
Here is how Mangei handles this position
6.e4 Bb4 7.Qc2 Nc6 8.Rd1 b5 9.Be2 Bb7 10.0-0 Bxc3 11.bxc3 Ne7 12.Nd2 0-0 13.Bg5 Ne8 14.e5 Qd7 15.f4 h6 16.Bh4 Nf5 17.Bf2 c6 18.g4 Ne7 19.Ne4 Nd5 20.Qc1 Qc7 21.Be1 f5 22.gxf5 Rxf5 23.Bg4 Rf8 24.Bxe6+ Kh8 25.f5 Bc8 26.Bxd5 cxd5 27.Ng3 Qe7 28.Qf4 a5 29.Nh5 Qg5+ 30.Qxg5 hxg5 31.Ng3 b4 32.cxb4 axb4 33.Bxb4 Rf7 34.a3 Nc7 35.e6 Bxe6 36.fxe6 Nxe6
1-0