1.d4
Nf6
2.c4
e6
3.Nc3
d5
4.Bg5
Be7
5.cxd5
exd5
6.e3
0-0
7.Bd3
Nbd7
8.Qc2
Re8
9.Nge2
c6
10.h3
Nf8
11.0-0-0
a5
Black decides not to waste any time developing his queen and instead immediately proceed to a queenside attack
12.Kb1
b5!
[ The pawn sacrifice 12...a4?!
13.Nxa4
Qa5
14.Nac3
b5
15.Nc1
]
13.g4
a4
14.Ng3
a3!?
[ 14...Qa5]
15.b3
Qa5
Black has noticeably weakened White's queenside flank
16.Rhg1
Kh8=
17.Nce2
Bd7
18.Nf5
Bxf5
19.gxf5
[ This way White gets an important plus for his attack, the control over the g-file, However , here it was better for him to take care of his own King instead and play 19.Bxf5
Intending to hamper the advance c6-c5 For example 19...Ra6
20.Bxf6
Bxf6
21.g5
Be7
22.h4
And then Ne2-f4-d3]
19...Rac8
And now Black seizes the initiative
20.Nf4
N8d7
21.Qe2
c5
22.dxc5
[ Bad was 22.Bxb5
in vies of 22...Ne4
23.Nxd5
Nb6
24.Qe1
Qxe1
25.Rdxe1
Nxd5
26.Bxe8
Nxg5
]
22...Nxc5
23.Bxf6
[ The pawn sacrifice is an offer White can't refuse. In case of 23.Qe1
Black would win in a spectacular way after 23...Nxb3!
24.axb3
a2+
25.Ka1
Bb4
26.Qe2
Bc3+
]
23...Bxf6
24.Nxd5
Na4
[ A really good strike, made possible by Black's complete control over the diagonal a1-h8. The knight sacrifice can't be accepted, for after 24...Na4
25.bxa4
bxa4
White's king becomes defenseless]
25.Rc1
Nc3+
26.Nxc3
[ Some counterattacking chances for White would arise after the sacrifice of the exchange 26.Rxc3
Bxc3
27.f6
]
26...Rxc3
27.Rgd1
Qb4
28.Bc2
Rcxe3
29.Qd2
[ 29.fxe3
Qc3
]
29...Rc3
30.Re1
Rxe1
31.Qxe1
h6
32.Rd1
Kh7
33.Qe2
Rxh3
34.Qe1
Qc5
35.Kc1
Rxb3
36.axb3
a2
White resigned. This example excellently demonstrates Black's possibilities for a successful queenside counterattack. Typical for such situations are the following actions by black.
1. Pawn offensive a5-a4-a3
2. The prophylactic move Kg8-h8 avoiding the dangerous opposition with the white rook on the g-file.
3. Breaking open the c-file and the diagonal a1-h8 by means of c6-c5.
4. Exploitation of the weak dark squares around White's King.
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