Chess (August): Wang Hao sqeeks by Magnus to win Biel

[Jack Rabbit]

11. Jakovenko - Li Chao, General Group/Standard Time Control, Round 4

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[center]Dmitry Jakovenko[/center][font size="1"]Photo by karpidis (http://www.flickr.com/photos/karpidis/) modified from flickr (http://www.flickr.com/photos/8022405@N02/1795364276/) in Wikimedia Commons (http://en.wikipedia.org/wiki/File:Jakovenko_Dmitry.jpg)
(Creative Commons License, Attribution/Share Alike)
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Dmitry Jakovenko - Li Chao
Team Match, Standard Time Control/Men's Group, Round 4
St Petersburg, 5 July 2012

West India Game: Indian Queen's Gambit (Russian Opening) (Grünfeld Defense)

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 b6

• Black picks an unusual move. For 7...a6, 7...Bg4, 7...Na6 and 7...Nc6 see Pashikian-Kurnosov, Aeroflot Op, Moscow, 2009.

8.e5

• [font color="red"]8.Bf4 c5 9.dxc5 Ba6 10.Qb3 Bxf1 11.Rd1 Qc8[/font] gives White a fair advantage in space (Stahlberg-Najdorf, IT, Mar del Plata, 1943).

8...Be6

[center]BLACK: Li Chao[/center]

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[center]WHITE: Dmitry Jakovenko[/center][center]Position after 8...Bc8e6[/center]

9.exf6

• This Queen sacrifice appears to originate with the Szabo-Barcza game, quoted below.
• If [font color="red"]9.Qa4 Nd5 10.Be2 f6 11.0-0 a6 12.Re1[/font] gkives White a fair advantage in space (Gilg-Pelikan, IT, Prague, 1937).

9...Bxc4 10.fxg7 Kxg7 11.Bxc4

• White has three minor pieces for the Queen.

11...c6

• [font color="red"]11...Nc6 12.Be3 Nb4 13.0-0 Nc2 14.Rad1 Nxe3 15.fxe3[/font] is equal (Kmoch-Prins, Amsterdam, 1940).

12.0-0 Nd7 (N)

• [font color="red"]12...a5 13.Re1[/font] then:
• [font color="red"]13...h6 14.Bf4 b5 15.Bf1 Nd7 16.d5[/font] gives White a fair advantage in space (Szabo-Barcza, Makovetz Mem, Budapest, 1939).
• [font color="darkred"]13...b5 14.Bb3 a4 15.Bc2[/font] gives White a small advantage in space.

13.Bf4

• White has a small advantage in space. Obviously, he must keep his pieces coordinated.

13...Nf6 14.Rad1!?

• Perhaps a calculated risk rather than a mistake, White eschews pinning Black's Knight at f6.
• [font color="red"]14.Be5 Kg8 15.Rfe1 a5 16.h3[/font] continues to give White a small advantage in space.

14...Qc8?!

• Black misses a chance to equalize with aggressive queenside play.
• [font color="red"]14...b5 15.Bb3 Nd5 16.Bxd5 cxd5 17.Nxb5[/font] is equal.

15.Rfe1!

• White has a comfortable game.

15...Qb7

• If [font color="red"]15...b5?! 16.Bb3 Qf5 17.Be5[/font] then:
• [font color="red"]17...Rad8 18.Ne4 a5 19.Bc2 h5 20.h3 Qe6 21.b3[/font] leaves White's minor pieces more active minor pieces than Black's Queen.
• If [font color="darkred"]17...a5? 18.d5![/font] then:
• [font color="darkred"]18...b4 19.Na4 cxd5 20.Nd4 Qg5 21.Nb6 Ra7 22.Nxd5[/font] gives White three minor pieces and more freedom for the Queen.
• If [font color="magenta"]18...a4[/font] then White wins after [font color="magenta"]19.Nd4 Qg5 20.Bc2 b4 21.Nxa4 cxd5 22.Nb6.[/font]

16.d5 cxd5 17.Nxd5 Rad8

• [font color="red"]17...Rfd8 18.Be5 Kf8 19.Nxf6 exf6 20.Bxf6[/font] continues to give White more activity for his pieces.

18.Be5 Rd7?

• Black prepared to double his Rooks. This move is fatal.
• If [font color="red"]18...h6 19.Bb3 Kh7 20.Bxf6 exf6 21.Re7 Qc8 22.Rxa7[/font] leaves White with all his pieces active.

[center]BLACK: Li Chao[/center]

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[center]WHITE: Dmitry Jakovenko[/center][center]Position after 18...Rd8d7[/center]

19.Bc3!

• After this, Black can take none of White's pieces without losing material.

19...Rfd8

• Black may as well play whate he intended anyway. 19...Rxd5 drops the exchange; 19...Nxd5 looks good after 20.Bxd5 Rxd5, except that 19...Nxd5 is illegal.
• If [font color="red"]19...Rb8[/font] then White wins after [font color="red"]20.Bb3 Kf8 21.Nxf6 exf6 22.Bxf6 Rc8 23.Ne5.[/font]

20.Rxe7 Rxe7 21.Bxf6+ Kf8

[center]BLACK: Li Chao[/center]

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[center]WHITE: Dmitry Jakovenko[/center][center]Position after 21...Kg7f8[/center]

22.Ng5!

• This move is simply brilliant.
• If [font color="red"]22.Bxe7+? Qxe7!! 23.Nxe7 Rxd1+ 24.Bf1 Kxe7[/font] is equal.

22...Rd6

• [font color="red"]22...Rxd5 23.Bxd5[/font] then:
• [font color="red"]23...Qd7 24.g3 h5 25.Bxe7+ Qxe7 26.h4 Qe2 27.Bb3[/font] leaves White the equivalent of an exchange to the good with active pieces.
• [font color="darkred"]23...Rd7 24.Nxh7+ Kg8 25.Be5 Qc6 26.Nf6+ Kf8 27.h3[/font] is an easy win for White.

23.Nxh7+! Ke8 24.h4

• [font color="red"]24.Bh4 Kd8 25.Bb3 f6 26.Bxf6 Rxd5 27.Rxd5+[/font] gives White two extra pawns.

24...b5 25.Bxe7 Qxe7

[center]BLACK: Li Chao[/center]

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[center]WHITE: Dmitry Jakovenko[/center][center]Position after 25...Qb7e7:B[/center]

26.Bxb5+

• White has two extra pawns.

26...Kd8 27.Ng5 Qb7

• [font color="red"]27...f6 28.Nxe7 Rxd1+ 29.Bf1 Kxe7 30.Nh3 Kd6 31.g3[/font] gives White two extra pawns.

28.Bc4 f5

• [font color="red"]28...Ke8 29.b4 Kf8 30.Rd4 Kg7 31.b5 Qc8 32.Ne4[/font] gives White the initiative and two extra pawns.

29.b3

• If [font color="red"]29.Rd3 Qxb2 30.Nf7+ Kd7 31.Nf6+[/font] then:
• [font color="red"]31...Ke7 32.Re3+ Kxf6 33.Nxd6[/font] confines the Black King to a small corner of the board.
• If [font color="darkred"]31...Qxf6[/font] then White wins after [font color="darkred"]32.Rxd6+ Qxd6 33.Nxd6.[/font]

29...Kc8 30.Nh3 Qg7

• If [font color="red"]30...Qd7 31.Nhf4[/font] then:
• [font color="red"]31...Qe8 32.g3 a6 33.Rd3 Qe1+ 34.Kg2 Qe4+ 35.f3[/font] gives White four actives pieces and two extra pawns.
• [font color="darkred"]31...Kb8 32.Re1 a5 33.a4 Qd8 34.g3 Qg8 35.Re5[/font] threatens to crush Black on the back rank.

31.a4 f4

[center]BLACK: Li Chao[/center]

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[center]WHITE: Dmitry Jakovenko[/center][center]Position after 31...f5f4[/center]

32.Nhxf4

• White has a material advantage equivalent to three pawns.

32...g5 33.hxg5

• If [font color="red"]33.Rc1[/font] then White wins after [font color="red"]33...Kd8 34.hxg5 Qxg5 35.Re1 Qg4 36.g3.[/font]

33...Qxg5 34.Rd3

• If [font color="red"]34.Re1[/font] then White wins after [font color="red"]34...Kb8 35.b4 Qg8 36.g3 Qc8 37.Bb3.[/font]

34...Qe5 35.Re3 Qd4

• If [font color="red"]35...Qa1+ 36.Kh2 a5 37.Kg3[/font] then:
• If [font color="red"]37...Qh8 38.Re7 Kb8 39.Ne3[/font] then:
• If [font color="red"]39...Qh6 40.Re5 Rd4 41.Rb5+[/font] then:
• [font color="red"]41...Ka7 42.Rxa5+ Kb8 43.Rb5+ Ka7 44.Rf5[/font] gives White four extra pawns.


• [font color="burgundy"]41...Kc8 42.Be6+ Kc7 43.Ned5+ Kd6 44.Bg4[/font] leaves White three pawns to the good, active pieces and a percfectly safe King.


• [font color="darkpink"]39...Qf6[/font] then after [font color="darkpink"]40.Re8+ Rd8 41.Rxd8+ Qxd8 42.Ne6[/font] White's position is a picture of harmony.


• If [font color="darkred"]37...Qg7+ 38.Kf3 Qa1 39.Re8+[/font] then:
• If [font color="darkred"]39...Kb7 40.Ne3 Rd2 41.Bd5+[/font] then:
• [font color="darkred"]41...Kc7 42.Ra8 Qe1 43.Ne6+ Kd7 44.Nc5+ Kc7 45.Ne4[/font] covers the f-pawn.


• If [font color="darkorange"]41...Kb6[/font] then White wins the exchange after [font color="darkorange"]42.Nc4+ Kc7 43.Nxd2.[/font]


• [font color="magenta"]39...Rd8[/font] then White wins the exchange after [font color="magenta"]40.Ba6+ Kd7 41.Bb5+ Kc8 42.Ne7+ Kc7 43.Ne6+.[/font]

[center]BLACK: Li Chao[/center]

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[center]WHITE: Dmitry Jakovenko[/center][center]Position after 35...Qe5d4[/center]

36.Re8+ Kb7 37.Re7+ Kb8 38.Rh7 a5

• [font color="red"]38...Rd8 39.g3 Qe5 40.Kf1 Re8 41.Ne3[/font] continues to give White three extra pawns and a brigade of active pieces.

39.g3 Qb2 40.Kg2 Qd4

• If [font color="red"]40...Qc2[/font] then White wins after [font color="red"]41.Re7 Rh6 42.Ne3 Qb1 43.Kf3 Rh2 44.Re8+.[/font]

41.Re7 Rh6

• If [font color="red"]41...Rd8[/font] then White wins after [font color="red"]42.Nc7 Rd7 43.Nb5 Qd2 44.Re8+ Rd8 45.Re6.[/font]

42.Nc7 Qc5 43.Re6 1-0

• [font color="red"]43...Rxe6 44.Ncxe6 Qf5 45.Bd3[/font] continues to give White a material advantage.
• Li Xiansheng resigns.