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Thursday, December 1, 2011

File and Rank : Its control.

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There are eight files, eight ranks, twenty six diagonals, and trillions of permutations and combinations. This means that your ultimate objective, the checkmate of the enemy king can be achieved in innumerable ways.

Kings Indian Defense

S. Reshevsky                       H. Westerinen

1.  d4                                         Nf6
2.  c4                                          g6
3.  g3                                         Bg7
4.  Bg2                                       0-0
5.  Nc3                                       d6
6.  Nf3                                       Nc6
7.  d5                                         -----

More usual is 7 0-0  a6  8  h3  followed by 9 e4 or 9 Be3

7  ----                                       Na5
8.  Nd5                                     c6!

A good move, which refutes White's entire setup. The point is that White is unable to win a piece with 9. b4 on account of 9 ... Nxd5! and Black's KB springs suddenly to life. Now White's KB becomes less effective and this casts suspicion on his entire system of development.

9.  0-0                                     cxd5
10. cxd5                                  Bf5

Having his knight "traped" after 11. b4 doesnot bother Black at all because he has the adequate reply 11 ...Rc8 12 Bb2  Nc4 with superior prospects.

11  Nb3

11  e4  Bg4  12  f3  Bd3  13  Qe2  Rc8  would deactivate White's KB without  improving his chances.

11  ----                                   N x b3
12  a x b3                               Qd7

With the intention of exchanging bishops by continuing ---Bh3

13.  e4                                     Bh3
14.  Qd3                                  Bxg2
15.  Kxg2                                b5!?

An interestng and enteprising move. Westerinen tries to seize the initiative on the queenside, now that he no longer has to worry about White's KB. His enterprise is commendable, but he runs the risk of giving White strong pressure on the opne lines leading to his quenside. His intention is to drive the knight from c3 where it protects white's centre.
16.  Be3                                 ----

But 16 Qxb5  Qxb5  17 Nxb5 Nxc4  18  Re1  Nc5  19  Rxe7  Nxb3 with advantage for Black.
16  ----                                    b4
17  Ne2                                   e6
18  Ra5                                   ---

This is the only means to keep up the pressure and it prepares to double rooks on the a-file.

18  ---                                    exd5
19.  exd5                                ----

White's pawn at d5, though isolated, restircts the mobility of Black's forces.

19  ----                                 Rfe8

Black's immediate problem is his 1-pawn which is exposed on an open file and under pressure from two directions. His only course is to apply counterpressure against White's d-pawn. The purpose of the text move is therefore, to play ...Re5.

20   h3                                   Re5
21.  Rfa1                                Rae8
22.  Rxa7
White now has full control of the a-file in addition he has a rook on the seventh rank, which makes it impossible for Black to build up the counterattack and , at the same time, restricts Black's mobility. White has the upper hand.

We see in this game the effect of control of an open file; ultimate occupation of the seventh rank. It is not alwyas possible or even necessary to try to open files early in the game in the vicinity of the enemy king, but control of a distant file serves the same purpose, especialy when, as in this case, the opponent has insufficient compensation.
22  ....                                   Rxd5
23  Nd4                                 Qc8
24  Qc4                                Qxc4
25  bxc4                               Rc5
26  b3                                   h5
27  R2a6                               Ne4

Black resigns after 41st move