Cecil Brown: Stefanova uses this line of the KIA quite a bit. The queen going to e1 breaks the pin and supports an early e4. Lev Gutman uses this line too.
Here are a few more Stefanova games in this line.
[Event "Dos Hermanas op 3rd"]
[Site "Dos Hermanas"]
[Date "2002.04.05"]
[Round "3"]
[White "Stefanova,Antoaneta"]
[Black "Korneev,Oleg"]
[Result "0-1"]
[Eco "A07"]
1.Nf3 d5 2.g3 c6 3.Bg2 Nf6 4.0-0 Bg4 5.d3 Nbd7 6.Qe1 e5 7.e4 dxe4 8.dxe4 Bc5
9.h3 Bh5 10.Nbd2 0-0 11.Nc4 Re8 12.a4 Qc7 13.Nh4 Bf8 14.Bg5 Re6 15.Bd2 Nc5 16.Ba5 b6
17.Bc3 Nfd7 18.b4 Nxa4 19.Rxa4 b5 20.Ra5 bxc4 21.g4 Bg6 22.Qe2 Nb6 23.Rfa1 Ree8 24.Qe3 Bd6
25.Nf5 Bxf5 26.exf5 e4 27.Qg5 f6 28.Bxf6 Bf4 29.Qh5 gxf6 30.Rxa7 Red8 31.Rxc7 Rxa1+ 32.Bf1 Bxc7
33.g5 Nd5 34.g6 h6 35.Qe2 Nf4 36.Qxc4+ Kh8 37.Qf7 Rxf1+ 38.Kh2 Rxf2+ 39.Kg3 Rf3+ 40.Kh2 Rd2+
0-1
[Event "EU-ch 3rd (Women)"]
[Site "Varna"]
[Date "2002.05.27"]
[Round "3"]
[White "Stefanova,Antoaneta"]
[Black "Shumiakina,Tatiana"]
[Result "1-0"]
[Eco "A07"]
1.Nf3 d5 2.g3 c6 3.Bg2 Bg4 4.0-0 Nd7 5.d3 Ngf6 6.Qe1 e5 7.e4 dxe4 8.dxe4 Bc5
9.h3 Bh5 10.Nbd2 0-0 11.Nc4 Re8 12.a4 Qc7 13.Nh4 Bf8 14.Bg5 Re6 15.a5 Bg6 16.b4 Rc8
17.Nxg6 hxg6 18.Be3 b5 19.axb6 axb6 20.Qd2 Rb8 21.Rfc1 b5 22.Ra7 Qd8 23.Na5 c5 24.bxc5 Nxc5
25.Qxd8 Rxd8 26.f3 Rc8 27.Bf1 b4 28.Bb5 Ne8 29.Rd1 Nc7 30.Bc4 Rd6 31.Rxd6 Bxd6 32.Kf1 N7e6
33.Bd5 Rc7 34.Ra8+ Kh7 35.Nc4 Be7 36.Nxe5 Bd6 37.Nc6 Bxg3 38.Nxb4 Bf4 39.Ke2 Bd6 40.Nc6 Nf4+
41.Kd2 Nce6 42.h4 Ng2 43.Bf2 Bc5 44.Bxc5 Nxc5 45.Nd8 Nxh4 46.Nxf7 g5 47.Nxg5+ Kg6 48.f4 Ng2
49.Nh3 Kh5 50.f5 Kg4 51.Ng1 Re7 52.Rg8 Nd7 53.e5 Nf4 54.f6 Rxe5 55.Rxg7+ Kf5 56.Rxd7 Kxf6
57.Rf7+ Kg6 58.Rxf4 1-0
[Event "Vlissingen HZ op 6th"]
[Site "Vlissingen"]
[Date "2002.08.04"]
[Round "6"]
[White "Stefanova,Antoaneta"]
[Black "Mellegers,Joost P"]
[Result "1-0"]
[Eco "A07"]
1.Nf3 d5 2.g3 Nf6 3.Bg2 c6 4.0-0 Bg4 5.d3 Nbd7 6.Qe1 e5 7.e4 dxe4 8.dxe4 Bc5
9.h3 Bh5 10.Nbd2 0-0 11.Nc4 Re8 12.a4 a5 13.Nh4 b6 14.Bg5 Qc7 15.Kh1 Rad8 16.c3 Re6
17.f4 exf4 18.gxf4 h6 19.Bxf6 Nxf6 20.e5 Ree8 21.Nf5 Nd5 22.Qg3 Bg6 23.Nxh6+ gxh6 24.f5 Kh7
25.fxg6+ fxg6 26.Be4 Re6 27.h4 h5 28.Rf5 Nf6 29.Qf3 gxf5 30.Bxf5+ Kh8 31.Bxe6 Nh7 32.Qxh5 b5
33.Rf1 Qg7 34.Nd6 1-0