Think a lot before moving a pawn

Think a lot before moving a pawn

Chess Checks

In the game which follows, the position is balanced in the middle-game but a wrong pawn by black suddenly changes the complexion of the game. Almost immediately Black has no defence as White with his queen and knights virtually force a checkmate.

White: Sergey Kiselev (2460) – Black: Pavel Tregubov (2545)
Elista , 1994
Slav Defence
1.d4 d5 2.c4 c6 3.Nf3 e6 4.e3 Bd6 5.Bd3 f5 6.0–0 Nf6
The Stonewall formation by Black
7.b3
A good move! White fianchettoes his bishop on the queen side and this bishop will be on a crucial diagonal as he will keep targeting the King long range
7. ..Qe7 8.Bb2 0–0 9.Nc3
White had a choice of a few good moves here like 9.Ne5 Bd7 10.Qc1 Rc8 11.Nd2 Ne4 12.f3 Nxd2 13.Qxd2 Be8 14.e4 or  9.Qc1 Bd7 10.Ba3 Be8 11.Bxd6 Qxd6 12.Qa3 Qd8 13.Nbd2 Ne4 14.Bxe4 fxe4 15.Ne5 Nd7 16.Nxd7 Qxd7 17.f3 exf3 18.Nxf3 Bg6 19.Ne5
9...Ne4
A crucial move, anchoring the knight at the centre of the board. If 9...b6 10.Qc2 Bb7?! 11.cxd5 cxd5 12.Nb5 Rc8 13.Qe2 White gets an edge
10.Ne2 Nd7
If 10...Bd7 11.Ne5 Be8 12.f3 Nf6 13.Rc1 Nbd7 14.Bb1
11.Qc2 b6 12.a3
White also can think about 12.Rac1 or 12.Rfd1
12. ..c5
Trying to strike at the centre and resolve things there. If 12...Bb7 13.b4 c5 14.bxc5 bxc5 leads to an unclear position
13.a4 Bb7 14.a5 Rac8
If 14...Rfc8 15.a6 Bc6 16.Ne5 Nxe5 17.dxe5 Bc7 18.f3 Ng5 19.cxd5 Bxd5 20.Nf4 Bc6 21.b4 looks good for White
15.axb6 axb6 16.Qd1 Rfd8
Better appears 16...Ra8
17.Ra7 Nb8
Black can also look at 17. ..Ndf6
18.cxd5 exd5 19.Bb5 Rc7 20.Nc3 Bc6
If 20...Nxc3 21.Bxc3 Bc6 (21...Nc6 22.Rxb7) 22.Rxc7 Bxc7 23.Bd3
21.Rxc7 Bxc7 22.Qe2 Qe8
If 22...Bb7 23.Ra1 with advantage for White
23.Bd3 Nd7 24.Rc1 Qe6 25.Qc2 Qh6
Black errs with this move! The other options available were 25...Bb8 or 25. ..Rb8
26.b4 c4
Again there were various possibilities for White to get advantage like 26...Nxc3 27.Qxc3 c4 28.Bxc4 or 26...cxd4 27.Nxe4 dxe4 28.Qxc6 Qxc6 29.Rxc6 exd3 30.Rxc7 or 26...Bb8 27.bxc5 bxc5 28.Ne2
27.Bxe4 dxe4
If 27...fxe4 28.Nxe4
28.Nxe4
A good move!
28. .. b5
If 28...Bxe4 29.Qxc4+ Kh8 30.Qxc7 And if 28...fxe4 29.Qxc4+ Kh8 30.Qxc6 Qxc6 31.Rxc6 exf3 32.Rxc7 with White getting better in both cases
29.Ng3

Diagram 1

29. ..f4
A premature advance and suddenly black’s game collapses like a pack of cards. If 29...Bxf3 30.gxf3 f4 31.Nf1 (31.Nf5 Qh5) 31...Qh5 32.Qe2 or 29...Bxg3 30.hxg3 Be4 31.Qe2
30.Nf5
Also good is 30.Ng5
30. ..Qe6 31.d5 Bxd5 32.Ng5 Qe8 33.Nh6+ Kf8
If 33...gxh6 34.Qxh7+ Kf8 35.Qg7 checkmate
34.Qf5+ Ke7 35.Qxd5 Nf8
If 35...gxh6 36.Qe6+ Kf8 37.Nxh7 checkmate. And if  35...Nf8 36.Ng8 checkmate  1–0

Diagram 2

White to play and win
1.Rg7 Kf8 2.Rgb7 Qa5 3.R7b5 Qa6 4.Rb8+ Ke7 5.R4b7+ Kd6 and Black loses the queen. It is incredible that Black is forced to part with his queen on an open board.

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