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(1) DEEP FRITZ - DEEP JUNIOR [D85]
Ultimate Computer Challenge Elista RUS (4), 09.06.2007
1.d4
Nf6
2.c4
g6
3.Nc3
d5
4.cxd5
Nxd5
5.e4
Nxc3
6.bxc3
Bg7
7.Nf3
c5
8.Rb1
0-0
9.Be2
Nc6
10.d5
Ne5
11.Nxe5
Bxe5
12.Qd2
e6
13.f4
Bc7
14.0-0
exd5
15.exd5
Ba5
16.f5
Bxf5
17.Rxb7
Qd6
18.Bc4
Qe5
19.Rf3
Rab8
Deep Junior decides to sacrifice a pawn, allowing Fritz a long term passer but gaining a rook attack in compensation. 20.Rxa7
Bb6
21.Ra4
Bc7
22.g3
Rb1
23.Re3
Qf6
24.Ra6
Bd6
25.Re1
Rfb8
26.Bf1
h5
27.a4
c4
A second pawn sacrifice, which was accepted by Deep Fritz. This allowed Deep Junior's second rook to penetrate White's position. 28.Rc6
Ra1
29.Bxc4
Bd7
30.Rf1
Qe7
31.Rxd6
Deep Junior's active piece play has forced Deep Fritz to sacrifice an exchange. 31...Qxd6
32.Qf2
Qb6
33.Bf4?
"Fritz lost game four after committing a serious error: 33.Bf4 is losing, and Be3 instead should be a draw." [Alexander Kure]. "A critical moment in the game. This move allows Deep Junior a favorable queen exchange while leaving Deep Fritz's king exposed to threats from the two black rooks. Fritz is forced to defend its king and its pieces, while Junior starts to push its king side pawns." [Shay Bushinsky]. [33.Be3
Rxf1+
34.Bxf1
Qb1
35.Qf6
Bh3
36.Bd4
Kf8=
(36...Qxf1+
37.Qxf1
Bxf1
38.Kxf1
+/=) ] 33...Qxf2+
34.Kxf2
Rb2+
35.Ke3
Rxa4
36.Bd3
Rxh2
"Even 37.Rb1 may still be playable. For example after the thematic h4 Rb8+ Kg7 Rb7 White has enough counterplay. The difference is that after this move White would be active while after the game move 37.c4 White was passive." [Mathias Feist of the Deep Fritz team]. 37.c4
Ra3
38.Kd4
h4
39.g4
Rh3
40.Be2
Rhb3
41.Ke5
Rb2
42.Re1
Raa2
43.Bd1
Ra6
44.Bc1
Rb8
45.Rg1
h3
46.Rh1
f6+
47.Kd4
Ra1
48.Bc2
g5
49.c5
Bxg4
50.c6
Kf7
51.Rf1
Rh8
52.d6
h2
53.d7
Ke7
0-1
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