1.Nf3
c5
2.c4
Nf6
3.Nc3
Nc6
4.d4
cxd4
5.Nxd4
e6
6.a3
Qc7
7.Ndb5
Qb8
8.g3
a6
9.Nd4
Nxd4
10.Qxd4
b5
11.e4
e5
12.Qe3
Qc7
13.cxb5
Bc5
14.Qf3
Bd4
15.Bg5
Bxc3+
16.bxc3
Nxe4
17.Qxe4
Bb7
18.Qb4
f6
19.b6
Qc6
20.0-0-0
Qxh1
21.Bh3
Qe4
22.Qd6
Kf7
23.Qxd7+
Kg6
24.Be6
Rhf8
25.Be3
The best defence here was 25...Bc6!
25...Rad8
White can now parry the attack on his queen with a pawn move, viz.
26.g4!!
- answer C). [26.Bf7+
wins back the exchange immediately, but after 26...Rxf7
27.Qxd8
Qa4!
Black would have no problems anymore since he has a firm grip on the light squares.]
26...Rxd7
27.Bf5+!
The point - White wins back his material and enters the 7th rank with his rook.
27...Qxf5
[27...Kf7
28.Rxd7+
Ke8
29.Bxe4
does not help.]
28.gxf5+
Kxf5
29.Rxd7
Be4
30.Rxg7
In this endgame Black has nothing to counter White's passed pawns on the queenside.
30...Ke6
31.Kb2
Rd8
32.Kb3
f5
33.Kb4
f4
34.Bc5
Rd7
35.Rg8
Bb7
36.Re8+
Kf5
37.c4
e4
38.Ka5
h5
39.Rb8
e3
40.fxe3
f3
41.e4+
Bxe4
42.Kxa6
Kg4
43.a4
Rf7
44.a5
Kh3
45.b7
Kxh2
46.Kb6
Rf6+
47.Ka7
Rf7
48.a6
Bd3
49.Rc8
Kh3
50.Kb6
Rf6+
51.Rc6
1-0