1.Nf3
c5
2.c4
Nf6
3.Nc3
e6
4.g3
b6
5.Bg2
Bb7
6.0-0
d6
7.d4
cxd4
8.Qxd4
a6
Black has set up a Hedgehog formation, pawns on a6, b6, d6, and e6
9.Rd1
Be7
10.Bg5
Nbd7
Normal development in the Hedgehog. Nc6 would block both the Bb7 and the c-file. From d7, the N can get to e5 (to attack c4)( and c5 (to attack the e-pawn)
11.Nd2
Permitting the exchange of the light-squared bishops, which often serves black well. Instead, white often plays Re1 and e2-e4 first
11...Bxg2
12.Kxg2
0-0
13.Nde4
Qc7
The usual post for the queen, further defending against e4-e5, providing a counter (Qxc4) to Nxd6, and starting the pressure down the open c-file.
14.Rac1
[14.Nxd6
Rad8
15.Nce4
(15.Bf4
e5
16.Nf5
Bc5
) 15...h6
16.Bxf6
(16.Bf4
Nh5
) 16...Nxf6-+
]
14...Rfd8
15.Kg1
h6
16.Nxf6+
Bxf6
17.Bxf6
Nxf6
18.b3
Rac8
Black offered a draw, and Kortchnoi, who has often expressed his disdain for the Hedgehog, turned it down immediately.
19.f3
With the idea of supporting e4
19...Qb8
Typical Hedgehog manoeuvering. Patience is required. Keep in mind that Black has no weaknesses. It's hard to break through.
20.Qd3
Qa8
21.e4
Diagram Adorjan now introduces the traditional double pawn break with b5 and then d5. Black's pieces are ready to pounce
21...b5
22.cxb5
d5
23.e5
[23.bxa6
dxe4
24.Qe3
exf3
and Black has all the play thanks to the exposed white King]
23...Nd7
White must defend the e5-pawn
24.Qe2
Rc5
The threat is Rdc8 exposing white's troubles with the pin on the Nc3.
25.a4
Defending b5, but now Black's pressure continues to build [Adorjan gives 25.bxa6
Rdc8
26.Qe3
Qxa6
27.f4
Qa3
28.Rc2
Qb4
29.Rd3
Nb8
idea d4]
25...Rdc8
26.Qe3
[26.Na2
axb5
27.axb5
Qa3
]
26...Qb8!!
27.f4
Qb6
28.Kg2
axb5
29.Kh3
[29.Nxb5
Rxc1
30.Qxb6
Nxb6
; 29.axb5
Qa5
]
29...R5c6
30.Qxb6
Nxb6
31.a5
Rxc3
32.axb6
[32.Rxc3
Rxc3
33.axb6
Rc6
34.Rc1
Rxb6-+
]
32...b4
33.Kg4
Kh7
setting up a nice 37th move...
34.Rxc3
bxc3
35.Rc1
d4
36.Kf3
d3
37.b7
Diagram
37...d2!
38.bxc8Q
dxc1Q
39.Qc4
Qd1+
And black gets a second queen 0-1