 With 7.f4 White stakes out even more space in the centre and threatens to overrun Black's position with a quick e4-e5. After 7 ... Bg7 White can transpose to the main line of the Four Pawns Attack in the King's Indian Defence with 8.Nf3 0-0 9.Be2. A rarer option is 8.e5, the Mikenas Attack, against which Black can equalize with either 8 ... Nfd7 or the rarer 8 ... dxe5 9.fxe5 Nfd7.
