After 3.c4 Nb6 4.a4 (the Emory Tate line), White can aim at chasing the black knight away followed by a pawn sacrifice that impairs Black's development, for example by 4...d6 5.a5 N6d7 6.e6, but this leaves Black with a strong center and an almost-winning position, though the threat of a5 still looms. Black can prevent this with 4...a5. White's main continuation is to deploy the for duties on the kingside with 5.Ra3, followed by Rg3 at some point when the attack on g7 is supposed to tie Black down from developing the bishop to e7. However, after 5...d6 6.exd6 exd6 7.Rg3 Bf5, Black can carry through with 8...Be7 anyway, since after 9.Rxg7 the rook would be trapped and lost to 9...Bg6 and 10...Bf6. The idea for this unusual early "rook lift" probably originated with the well-known American International Master Emory Tate. Women's World Champion GM Maria Muzychuk, World Junior Champion GM Lu Shanglei and GM Nazar Firman have experimented with this line and achieved some success with it.