Im mi a m mmmimim

m m m mm m m mmm m mim m m ail m± mm mm m$M & &&

A brilliant move which announces the Zugzwang. White has not a move left. If 26.Kh2 or g4 then comes 26...R5f3. Black can now make waiting moves with his King, and White must eventually throw himself upon the sword. 0-1

Game 9

Nimzowitsch-Pritzel

Ccpvnhuoen, 1922

1.d4 g6 2.e4 Bg7 3.Nc3 d6 4.Be3 Nf6 5.Be2 0-0 6.Qd2

20...fxe4l

This sacrifice, which has a quite surprising effect, is based upon the lollowing sober calculation: two pawns and the 7th rank, plus an enemy Queenside which cannot be untangled -all this for only one piece!

21 .Qxh5 Rxf2 22.Qg5 Raf8 23.Kh1 R8f5 24.Qe3 Bd3 25.Reel h6!!

In order by Bh6 to exchange the Bg7.

The plan chosen by White is seductive in the simplicity of the means to be employed. He intends after allowing the exchange of Queens, to get some advantage on the d-file.

Moves which weaken such important points such as d6 should be avoided if in any way possible, and in fact a piece soon settles itself on this square. The important point '.o be observed by the student is that before Black's ...c6 the d file was only underpressure, wnereas alter this move It is clearly weakened. It would have been better to forgo ...c6 and to instead have played 9...Nc6. For instance, the continuation might be 10.h3 (in order to be able to play 11 .Nf3 without the fear of the reply 11...Ng4), 10...Nd4l? 11.N13I (but not 11.Bxd4 oxd4 12.Rxd4 Ng4l), 11...Nxe2+ or 1t ...Nxf3 and White stands better after either recapture.

Nevertheless, 9...Nc6 was the correct move, but after 10.h3, Black must continue with 10...Be6. For example 10.h3 Be611.Nf3h612.Rhd1 a6. In this position White has unquestionably full possession of the d-file. Since, however, neither an invasion of the 7th rank by Rd7 nor the establishment of an outpost by Nd5 lies within the realm of possibility, the value of the file would seem to be problematic. White's e-pawn is in need of protection and this circumstance has a considerable crippling effect. Black has two courses open for consideration: (a) to play at once ...Rfd8, with the idea of the double exchange on d8 followed by Nxe5 and ...Nxe4 though this variation must be prepared for by ...Kh7 or ...g5 in order to safeguard the h-pawn against the Be3. (b) the slow maneuver ...Rfc8, followed by K-f8-e8, and finally the challenge of the Rooks by ...Rd8. The fact that this last line of play is possible is significant proof of the small amount of activity of White on the d-file.

10.a4

Apparently compromising, in reality, well thought out, for first b5, which would bp an indirect and therefore unwelcorr.a attack on the pawn at e4, must be prevented, and second. Black's Queenside is to be besieged. We feel ourselves justified in pursuing this ambitious plan since now that 9...c6 has been played our positional advantage in the center is unquestionable and should have a real effect even on the wings; a proposition which may be thus formulated: a superior position in the center justifies a thrust on an extreme flank.

10...Ng411.Bxg4 Bxg412.Nge2 Nd7

In unusual situations ordinary moves are, it would seem, seldom suitable. The proper system of development here was ...Na6, ...Rfe8, and ...Bf8. The weakness at d6 would then have been covered and the position would have been perfectly tenable.

13.Rhd1 Nb6 14.b3 Bf6 I5.f3 Be6 16.a5 Nc8 17.Na4

It is now clear that the suggested development by 12...Na6 would have wasted less time than that in the text (Nd7-b6-c8). White now has a strong position on the Queenside and threatens to get a grip on the enemy with Nc5. We see that 10.a4! was valuable as an attacking move.

An excellent parry. If 18.axb6 axb6 19.Bxb6 (19.Nxb6 Nxb6 20.Bxb6 Bg5) naturally comes 19...Bg5.

18.Rd3bxa5

Sad. The right move was 18...R68 and Black's position still had life in it.

19.RC3 Ne7 20.Rc5 Rfb8 21.Nec3

The a-pawn won't run away.

One Knight makes room for the other.

24...Rab7 25.Rxa6 Nc8 26.NXC8 Rxc8 27.NC5 Rbc7 28.Rd6

Now at last the point seized which Black weakened by his 9th move; but its occupation had always been in the air.

In the notes to this game we have become acquainted with the resources at the disposal of the defender ol a file. Since a knowledge of these is of the greatest practical value in the conduct of a game, we give another game which will be found instructive in the same

Gams 10

Nimzowitsch-Dr. Tarrasch

Breslau. 1925

Playable, but 3...e6 seems better. 3...e6 4.d4 cxd4 5.Nxd4 Bb4 or even 3...Nc6. For example 3...Nc6 4.04 cxd4 5.Nxd4 g6, and now White could, it is true, by means of 6.e4, slowly try to tie up his opponent, but this attempt could be adequately parried by 6...Bg7 7.Be3 Ng4! (Breyer's move) 8.Qxg4 Nxd4 9.Qd1! Ne6! (suggested by Nimzowitsch). The position reached after 9...Ne6! is fairly rich in resources for Black. Development might contioue witlj ...Qa5 ...0-0 followed by ...f5 ...b6 and ...Bb7. The student should examine for himself these lines of play.

4.cxd5 Nxd5 5.d4 cxd4

6.Qxd4 e6 7.e3 (see next Diagram)

A very cautious move, on which I decided because I recognized the more enterprising continuations 7.e4 and

7.Nxd5 exd5 8.e4, as leading to little for

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