1.e4
e5
2.Nf3
Nc6
3.Bb5
Nf6
4.0-0
Nxe4
5.d4
Nd6
6.Bxc6
dxc6
7.dxe5
Nf5
8.Qxd8+
Kxd8
9.Nc3
Ke8
10.h3
h5
11.Bf4
Be7
12.Rad1
Be6
13.Ne2
Rd8
14.Ned4
Nxd4
15.Nxd4
Bc8
16.c3
g5
17.Bc1
Rg8
18.Ne2
Rd5
19.f4
gxf4
20.Rxd5
cxd5
21.Nxf4
c6
22.Be3
b6
23.Rf3
Rh8
24.a4
Rh7
25.Ne2
Be6
26.b4
Kd7
27.Rf1
Rg7
28.Kh2
Rg8
29.Nf4
Rh8
30.b5
Rc8
31.Nxh5
cxb5
32.axb5
Rxc3
33.Bg1
Ra3
34.Nf6+
Bxf6
35.exf6
Ra5
36.Rb1
Bf5
37.Rb3
Bc2
38.Rb2
Bd3
39.Rd2
Be4
40.Rb2
Ke6
41.Bd4
Ra4
42.Rd2
Rb4
43.Kg3
Rxb5
44.Kf4
Rb1
45.g4
a5
46.Rb2
Rxb2
47.Bxb2
b5
48.h4
b4
49.Bd4
a4
50.h5
Bh7
51.Ke3
a3
52.Bc5
0-1 The principle of one diagonal
Pure opposite colored bishop endings have a very large drawish tendency. If the defender is dug in on squares of his own bishop his fortress usually cannot be stormed. But no rule without exceptions: why did Negi resign without waiting for Black's answer?
52...d4+!!
Elshan Moradiabadi destroys White's defensive set up in a radical way. [52...Kxf6?
53.Bxb4
a2
54.Bc3+
The bishop controls all important squares on one diagonal and will not fall into zugzwang. 54...Kg5
55.Kf3
Be4+
56.Kg3
f5
(56...Bc2
57.Bd2+
Kf6
58.Bc3+
Ke6
59.Kf4=
) 57.gxf5
Bxf5
58.Kf3
Kxh5
59.Ke3
Kg4
60.Kd2
Kf3
61.Kc1
Bb1
62.Kb2
Ke4
63.Bg7
d4
64.Bxd4
Kxd4
65.Ka1=
; 52...a2?
53.Bd4=
; 52...Ke5?
53.g5
Kf5
(53...Bf5
54.g6
d4+
55.Bxd4+
Ke6
56.gxf7
Kxf7
57.Bc5
a2
58.Bd4=
) 54.g6
d4+
55.Bxd4
Bxg6
56.hxg6
Kxg6
57.Bc5=
]
53.Bxd4
[53.Kxd4
a2-+
]
53...b3
54.Kd2
b2
Now Black's bishop rules.
55.Bxb2
axb2
56.g5
b1Q-+
0-1