The Price of Time

Время публикации: 09.02.2012 22:37 | Последнее обновление: 09.02.2012 22:37
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The game of the day: Ulibin - Zhigalko S.

One of the notable duels of Round 2 was the strongest Belarusian player's, Sergei Zhigalko's victory over the experienced Russian GM Mikhail Ulibin.  

Mikhail ULIBIN - Sergei ZHIGALKO

Aeroflot Open A 2012, Round 2
Modern Benoni Defence
(Mikhail Golubev's commentary).
1.d4 Nf6 2.c4 e6 3.g3 c5
White desired to play Catalan opening, but Black's response oriented on Benoni defence, where opponent's choice is limited with g3 system.  
4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.Nf3 Bg7 8.Bg2 0–0 9.0–0 Re8
The most popular line - 9...a6 10.a4 Nbd7.
10.Bf4 a6
Usually Black don't hurry moving their flank pawn.
11.a4 Nh5 12.Bg5 Qc7 13.Rc1 Nd7 14.b4

The position is interesting for the Modern Benoni theory, however, yet there are few practical examples. 
14...b6
A risky alternative - 14...h6 15.Be3 Rxe3 16.fxe3 cxb4 17.Ne4 Qb6 with a quite forced play: 18.Nd4 a5 19.Qc2 f5 20.Nd2!? (20.Nf2 Nc5 Nikolic - Hjartarson, Linares 1988) 20...Bxd4 21.exd4 Qxd4+ 22.e3! Qxe3+ 23.Kh1 Nhf6 24.Rfe1, and now Black is forced to play 24... Qc3 (24...Qd4? 25.Re6! Krause - Lindemann, a correspondence game from 1994).
15.Qd2!? N
15.Nd2 also took place (Noble - Sarapu, Melbourne 1993), 15.a5 is followed by 15...b5!.
15...Bb7 16.Bh6 Bh8 17.g4
Of course, this plan is not mandatory at all.
17...Nhf6 18.h3

18...Rac8
Interesting is 18...cxb4!? 19.Nb5 Qb8 20.Nc7 a5 and then ...Nc5 with a compensation for the exchange and a complicated struggle.
19.bxc5 bxc5 20.Ng5! c4!?
Black tends to activate and weaknesses don't actually scare it. 
21.Qf4 Re7 22.Rfd1 Ne8 23.Nge4 Be5 24.Qd2 Nc5?!
24...Nef6 is probably a better choice.
25.Nxc5 Qxc5 26.Bg5!

Ulibin got advantage, but at this point he already spent too much time - and that adversely affected the result. .
26...Nf6!? 27.e3!
White could win the exchange - 27.Bxf6 Bxf6 28.Ne4 Rxe4 29.Bxe4, but a strong passed pawn gives Black a counterplay.
27...Qa7 28.f4?!
A premature action after which the turning point of the fight comes. After 28.a5! White's position is preferable.
28...Bxc3 29.Rxc3 Ne4 30.Bxe4 Rxe4 31.Bf6
Here, as well as on the next move, f5 deserved consideration.
31...Qc5 32.Qf2 Rce8 33.Kh2
33.Kf1 could be answered with 33...Rxe3 with an idea of 34.Bd4 Qxd4! 35.Rxd4 Rxc3.
33...Rxe3

34.Bd4?
Finally, White blunder. After 34.Rxe3 Qxe3 35.Qxe3 Rxe3 White wasn't supposed to lose.
34...Qxd5! 35.Rxe3 Rxe3 36.Bxe3
36.Qxe3? Qg2#.
36...Qxd1
Black stayed with two extra pawns, however there are opposite-color bishops which means the fight hasn't finished yet.
37.Bd2

37...Qc2!
Simply a strong move as well as an insidious trap. 37...Qh1+ 38.Kg3 wouldn't bring any result, White still have chances of salvation.
38.Qd4?! c3! 39.Qxc3 Qe4
Queen efficiently occupies the main diagonal.
40.Kg3 Qg2+ 41.Kh4 Qf2+ 42.Kg5 h6+! 43.Kf6 Qh4+ 44.g5 hxg5

White can't take on g5 because of 45...Kf8! (the simplest), and then checkmate from h8.
45.Be1 Qxf4+
Black converted three extra pawns.
46.Ke7 Qxa4 47.Kxd6 Qe8 48.Kc7 Bg2 49.Bd2 Qe7+ 50.Kc8 Qe6+ 51.Kc7 Bxh3 52.Qd4 Qc8+ 53.Kb6 Qb8+ 54.Kc6 Bg2+ 55.Kd7 Qb7+ 56.Kd8 Qd5+ 57.Qxd5 Bxd5 58.Bxg5 a5 59.Ke7 Kg7 60.Kd6 Bb3 0–1


  


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