1.d4
Nf6
2.c4
g6
3.Nc3
Bg7
4.Nf3
0-0
5.Bf4
d6
6.h3
Qe8
7.e3
Na6
8.Be2
Nh5
9.Bh2
f5
10.Rb1
f4
11.b4
c5
12.b5
Nc7
13.0-0
b6
14.Nd5
Nxd5
15.cxd5
fxe3
16.fxe3
Bh6
17.Qd3
Bf5
18.e4
Bd7
19.Qb3
Nf4
20.Bc4
Qc8
21.e5
cxd4
22.e6
Be8
23.g3
Nh5
24.Kh1
Qc5
25.g4
Rc8
26.Bd3
Nf4
27.g5
Bg7
28.Bxf4
Rxf4
29.Nd2
Rh4
30.Rf3
h6
31.Ne4
Qc7
32.gxh6
Rxh6
33.Rg1
Qb7
34.Rfg3
Rh5
35.Rg5
Rxh3+
36.Kg2
Re3
37.Rg3
Rxg3+
38.Kxg3
Bh6
39.Rh1
Kg7
40.Bc4
Be3
41.Qb2
g5
42.Kg4
Bd7
43.Nxg5
Rxc4
44.Rh7+
Kg6
45.Rh6+
Kg7
46.Rh7+
Kg6
47.Rh6+
Kg7
48.Qg2
Bxg5
49.Kxg5
Be8
50.Kf5+?
Being in time-trouble, White decides to go for the perpetual. [Instead, he could have won, however, not with 50.Qe4?
Qxd5+!
51.Qxd5
Rc5
52.Qxc5
dxc5-+
; but with another move - answer C) - and this move is 50.Rh8!!
, when Black is helpless - 50...Rc2
(The rook is taboo on account of 50...Kxh8 51.Kh6 and mate on g7, while alternatives are no better: 50...Qxd5+
51.Qxd5
Rc5
52.Qxc5
dxc5
53.Rxe8
; or 50...Bg6
51.Rg8+
Kxg8
52.Kh6
) 51.Qh1!
Controling the h-file while keeping an eye on d5. 51...Bh5
(51...Rh2
52.Rxh2!
) 52.Rxh5
]
50...Kxh6
51.Qg5+
Kh7
52.Qh4+
Kg7
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