Against 4.a3 I've been playing 4...Bb7, but recently took a look at 4...Ba6!?, for instance 5.Qc2 Bb7 6.Nc3 c5 7.e4 cxd4 8.Nxd4 Bc5 9.Nb3 Nc6.

Micky Adams has won some nice games in this variation and I am looking forward to give it a try myself (though my likely oppsition will be somewhat less imposing

)

[Event "Bundesliga 2002/03"]

[Site "Germany"]

[Date "2002"]

[Round "2"]

[White "Khenkin Igor (GER)"]

[Black "Adams Michael (ENG)"]

[Result "0-1"]

[Eco "E12"]

[Annotator ""]

[Source ""]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Ba6 5.Qc2 Bb7 6.Nc3 c5 7.e4 cxd4

8.Nxd4 Bc5 9.Nb3 Nc6 10.Bg5 h6 11.Bh4 Nd4 12.Nxd4 Bxd4 13.Bd3

Qb8 14.Bg3 Be5 15.O-O-O O-O 16.Kb1 d6 17.Bxe5 dxe5 18.Qe2 Rd8

19.Qe3 Rd4 20.f3 Ba6 21.b3 Qc7 22.Kb2 Rad8 23.Ne2 R4d7 24.Bc2

b5 25.c5 b4 26.axb4 Rb8 27.Bd3 Bxd3 28.Rxd3 Rxb4 29.Rc1 Qc6 30.Rd6

Rxd6 31.cxd6 Qxd6 32.Qxa7 Nd7 33.Qc7 Qd3 34.Qc2 Nc5 35.Qxd3 Nxd3+

36.Kc3 Nxc1 37.Nxc1 Rb8 38.Nd3 Rc8+ 39.Kd2 f6 40.g4 g5 41.b4

Kf7 42.Nc5 Ke7 43.Kc3 h5 44.gxh5 Rh8 45.b5 Kd6 46.Nb7+ Kc7 47.Nc5

Rxh5 48.Nxe6+ Kb6 49.Kc4 Rh3 50.Nc5 Rxf3 51.Na4+ Kb7 52.Kd5 Rf2

53.h3 Rf3 54.Ke6 Rxh3 55.Nc5+ Kc8 56.Kxf6 g4 57.Ne6 g3 58.Ng5

Rh1 59.Kxe5 g2 60.Nf3 Rf1 0-1

[Event "It 'Eurotel World Chess Trophy'"]

[Site "Prague (Czech Republic)"]

[Date "2002"]

[Round "1"]

[White "Radjabov Teimour (AZE)"]

[Black "Adams Michael (ENG)"]

[Result "0-1"]

[Eco "E12"]

[Annotator ""]

[Source ""]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Ba6 5.Qc2 Bb7 6.Nc3 c5 7.e4 cxd4

8.Nxd4 Bc5 9.Nb3 Nc6 10.Nxc5 bxc5 11.Bd3 O-O 12.O-O d6 13.f4

h6 14.Qd1 Rb8 15.Be3 Re8 16.Rb1 a5 17.Nb5 e5 18.f5 Nd4 19.Nc3

Bc6 20.Rf2 Rb6 21.g4 Nh7 22.Rg2 Ng5 23.Rg3 Qa8 24.Bxg5 hxg5 25.Qd2

Qd8 26.Rh3 Qe7 27.Ne2 Rb3 28.Nc1 Rb6 29.Qxa5 Qb7 30.Qd2 f6 31.Re3

Bxe4 32.Qf2 Bc6 33.h4 Nf3+ 34.Rxf3 Bxf3 35.hxg5 fxg5 36.Qe3 e4

37.Bf1 Qe7 38.b4 Qe5 39.b5 Qg3+ 0-1

Finally, against 4.Nc3 you can get the delightful QI-Nimzo Hybrid (I play this line from both sides) after 4...Bb4, and against 4.e3 a good way to go is 4...Bb7 5.Bd3 d5 6.0-0 Bd6!

Ptero