Quote:The problem with the Averbakh system is 6... c5. This is the most critical continuation, immediately attacking the center.
White normally replies 7.d5 or the less popular 7.dxe5.
after 7.d5
1. d4 Nf6
2. c4 g6
3. Nc3 Bg7
4. e4 d6
5. Be2 O-O
6. Bg5 c5
7. d5 h6
8. Bf4 Qa5
9. Qd2 e5
10. dxe6 ...
OR
A. 10. Bxh6 Bxh6 11. Qxh6 Nxe4 White may have some problems. At the very very least Black is no longer playing to equalize.
B. 10. Be3 a6 11. f3 Kh7 12. h4 {There are no more active attempts here.} Nh5
Black's position is the more promising: he has forestalled his opponent's play on the kingside, and is ready for action on the queenside, where White might be planning to evacuate his king.
10... Bxe6
11. Bxd6 Rd8
12. e5 Ne8
Black is better developed and
the regaining of the pawn is merely a matter of time.
The problem for black in the above line is not 11.Bxd6 but rather 11.Qd2!. Witness the following illustrative games, which are important for the theory of this line:
[Event "Palma de Mallorca Interzonal"]
[Site "Palma de Mallorca"]
[Date "1970.11.09"]
[Round "13"]
[White "Uhlmann,Wolfgang"]
[Black "Ujtumen,Tudev"]
[Result "1-0"]
[Eco "E74"]
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 0-0 6.Bg5 h6 7.Be3 c5 8.d5 e6 9.dxe6 Bxe6 10.Qd2 Qa5 11.Bxh6 Bxh6 12.Qxh6 Nxe4 13.Rc1 Nc6 14.h4 Nd4 15.Kf1 Nf5 16.Qf4 Nxc3 17.Rxc3 Qxa2 18.Qc1 Qa5 19.h5 Ng7 20.Rg3 Bf5 21.hxg6 fxg6 22.Bf3 Rae8 23.Bd5+ Ne6 24.Nf3 Kg7 25.Kg1 Rh8 26.Rxh8 Rxh8 27.b4 Qxb4 28.Bxe6 Qb1 29.Qxb1 Bxb1 30.Ng5 Rb8 31.Rf3 Bf5 32.Bxf5 gxf5 33.Rxf5 b5 34.cxb5 Rxb5 35.Ne4 Rb1+ 36.Kh2 Rd1 37.Rf3 Rd4 38.Ng3 Rd5 39.Ra3 c4 40.Rxa7+ Kg6 41.Rc7 Rc5 42.Rxc5 dxc5 43.Ne4 1-0
[Event "Bundesliga 9900"]
[Site "Germany"]
[Date "1999.10.??"]
[Round "3"]
[White "Kachiani Gersinska,Ketino"]
[Black "Uhlmann,Wolfgang"]
[Result "1-0"]
[Eco "E74"]
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 0-0 6.Bg5 c5 7.d5 h6 8.Bf4 e6 9.dxe6 Bxe6 10.Qd2 Qa5 11.Bxh6 Bxh6 12.Qxh6 Nxe4 13.Rc1 Nc6 14.h4 Nd4 15.Kf1 Nf5 16.Qf4 Nxc3 17.Rxc3 Qb4 18.Qc1 Kg7 19.h5 Rh8 20.Nf3 Qa5 21.Ng5 Rae8 22.Rch3 Nd4 23.Nxe6+ Rxe6 24.Bg4 f5
25.hxg6 Rxh3 26.Rxh3 fxg4 27.Qh6+ Kf6 28.Qf8+ Kg5 29.f4+ gxf3 30.Rg3+ Kh4 31.Qf4+ 1-0
[Event "CP.2001.P.00015"]
[Site "IECG email"]
[Date "2001.10.01"]
[Round "0"]
[White "Zaichuk,Vitaliy"]
[Black "Wong,Victor"]
[Result "1-0"]
[Eco "E74"]
1.c4 Nf6 2.d4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 c5 6.d5 0-0 7.Bg5 h6 8.Bf4 e6 9.dxe6 Bxe6 10.Qd2 Qa5 11.Bxh6 Bxh6 12.Qxh6 Nxe4 13.Rc1 Re8 14.h4 Nxc3 15.Rxc3 Qxa2 16.Qc1 Qa5 17.h5 Nc6 18.Kf1 Qc7 19.Rg3 1-0
Notice how GM Uhlmann a reknowned KID expert in his own right, after winning with White way back in 1970 decided to later switch sides in 1999, no doubt with an improvement in mind, but still failed to rehabilitate the line for black.
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