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Sunday, May 29, 2011

Anotated Game

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Samisch - Nimzowitsch
Copenhagen 1923
Queen's Indian Defence

1  d4  Nf62  2  c4  e6   3  Nf3  b6  4  g3  Bb7  5  Bg2  Be7  6  Nc3  0-0  7 0-0  d5
8  Ne5  c6  9  cxd5  cxd5  10  Bf4  a6  11 Rc1  b5  12  Qb3  Nc6  13  Nxc6  Bxc6
14  h3  Qd7  15  Kh2  Nh2  16  Bd2  f5  17  Qd1  b4  18  Nb1  Bb5  19  Rg1  Bd6  
20  e4

Black is threatened with 21 Qxh5, 21 exd5 and 21 e5, but there follows a surprising offer of a piece
20  ....  f xe4! 21 Q xh5  Rxf2

Nimzowitsch himself commented as follows. 'Two pawns, the seventh rank and an inextricable queenside
all that for merely a piece!'

22  Qg5  Raf8  23 Kh1

Not Qe3 because of 23 ..... R8f3

23  ....R8f5   24  Qe3  Bd3 

Threatens to win the queen by 25.... Re2

25 Rce1  h6!

White is in zugzwang. He cannot move without losing a piece (apart from a3,b3, h4 but these move will
soon be exhausted for example
Apart from all this, Black could have exchanged two rooks for a queen and a bishop, but the waiting move is stronger and brings more substantial gain. This is an immortal zugzwang, a monumnet worthy of Nimzowitsch.
Three principles have provided the subject matter of this chapter : Half-open files, open files and the seventh rank. They differ individually, but have so much in common that an exhaustive study of each one separately is scarcely possible.

Besides the vertical and horizontal lines, along which pieces operate, the chessboard also contains diagonal lines, the hunting ground of the bishops and, at times, of the queen. The character of these diagonals is of a different kind, if only because the trebling of pieces is impossible, and further, because hostile pawns bear a different relation to diagonals as compared with files and ranks. A file, once open, remains open - except for possible exchange transactions - but the diagonal from g2 to b7 can be blocked by pawns at c6, d5, e4 and f3. Therefore remember once we have placed a bishop in an attacking position against the opposite hostile flank ( e.g. Bg2 attacking a pawn chain b7-c6  or  Bd3 attacking the chain g6-h7) it is generally desirable to advance the pawns on the flank against which the bishop is exerting pressure, in order to assist the work of the bishop ( thus in this case playing b4-b5 against and c6 or h4-h5 against g6) In this way diagonal is used to its greatest effect.

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