Capítulo 4. PARÁMETROS DEL ELECTRODO
4.4 Enlace estación convertidora – EPT
I
always lucky. From the examples demont is said that winner of the first prize is strated below, you will see that in the USSR Cup (the club team championship of the country) in 1 976 in Tbilisi our Burevestnik team was indeed lucky. But when you have by no means the most impressive line-up, competitive good fortune alone is not enough to win by an enormous margin (before the last round we were already T'h points ahead of our nearest rivals). Our success was largely secured by the friendly atmosphere reigning in our team , the benevolence and mutual help. An important role was also played by our superiority in the analysis of adjourned positions (although from the exam ples given below you would probably not say this) - when they were resumed the results of a good dozen games came as a pleasant surprise to us.On the evening before the adjournment day our leader Vasily Smyslov adjourned his game against Mikhail Tal in what was a dangerous position for him. At a team meeting he said that the following day he would need help with the analysis.
'Of course, of course, let's look at the position together, ' grandmaster Taimanov offered his services.
'Thank you , Mark Evgenevich , but I would like to work with Mark lzrailevich , ' S myslov replied .
Of course, it is flattering to have the reputation of being a good analyst, although at times it is slightly onerous - after all, my game was also adjourned . But the following morning Smyslov and I sat down to look at
his position. After three hours of exception
ally intensive work my head was l iterally splitting, but on the other hand it appeared that we had found a way to save the game.
Tal -Smyslov Tbilisi 1 976
Of course, it is unfavourable to play 42 g5?
.l::i.xh5 43 tt::lf6+ �g6 , and therefore Tal's sealed move was obvious.
42 tt::lxd6 cxd6
Now the capture of the b6-pawn allows Black to activate his king : 43 .l::i.xb6 �h6! 44 .l:!.xd6+ (44 f4!? exf4 45 .l:!.xd6+ also does not win ) 44 . . . �g5 45 f3 e4! with counterplay sufficient for a d raw, for example: 46 .l:!.g6+
'it>f4 47 fxe4 a4.
White must play more sharply.
43 .l::i.xd6!
We have a choice between 43 .. . b5 44 .l::!.a6 a4 and 43 .. . .l::i.b 1 . In both cases the opponent sends his king forward . The queenside
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Adventures on Adjournment Daypawns do not advance very quickly - during this time danger impends over the black king. The following variation is an instructive one, illustrating the typical ideas in the position and the difficulties facing Black.
43 .. J�tb1 44 'it>f3! (44 g5? .l:tg 1 is prematu re) 44 .. . a4 (44 . . . .l:tb4? 45 'it>g3 and 46 g5) 45 'it>e4 a3 46 .l:td7+ 'it>h6 (46 . . . 'it>g8 47 .l:ta7 .l:tb3 48 'it>f5 or 48 g5 is completely bad for Black) 47 \t>f5! (threatening 48 g5+ \t>xh5 49 .l:!.h7 mate) 47 .. . .l:!.g 1 48 .l:!.a7 .l:tg2 49 f4! exf4 which would enable him to block the pawns securely and set up a familiar drawn position with king on g5 and rook on c5. should be carried out. What, do you think, is this idea?
It turns out that Black should switch his rook to the 8th rank. Firstly, from here it covers the king - to checkmate it the opponent will have to bring forward his king and both pawns, and this demands time. Secondly, it may be possible to place the rook behind its own pawn and advance it, while giving up the other.
So, the general plan has been fou nd. It is merely necessary to firid the most accurate way of implementing it.
We considered 45 'it>f3 to be more accurate.
Tal was concerned about the reply 45 . . . a3, but in this case Black loses: 46 c.t>g2 .Ua 1 47
g5 b4 48 g6+! (not 48 �a7+? Wg8 49 g6 Iic1 50 h6 l:!.c8) 48 .. . Wh6 49 .l:!.a7 with the decisive th reats of 50 l:th7+ or 50 g7 'it>h7 51 h6 and 52 l'la8 . Therefore Smyslov would so that it was not easy for Smyslov to make a choice. He realised perfectly well that, in
Adventures on Adjournment Day
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99 This was how we intended to switch the rookto the 8th rank. True, in this way the position of the white king is improved , although the e5-pawn remains invul nerable. We rejected
47 ... J:!.c8 ! , because we considered that Black was lost in the position arising after 48 'it>xe5 .l:!.b8 49 g5 b4 50 .U.a7+ 'it>g8 51 �a4 b3 52 l1a 1 b2 53 l:!.b1 .
Not long before the resumption Vasily Vasilievich came up to me.
'You know, ' he said , 'it would appear that White's three pawns do not win . '
'That can't b e s o ! ' I said in su rprise, a n d I tried to refute his conclusion , but without success. Here is the key position .
1 . . . l:tb3+ 2 'it>d4 ( 2 'it>d2 .U.b4 3 f5 .i:i.b5)
2 . . . J:.b4+ 3 Wc3 l:txf4 4 l:txb2 .U.h4! with a
draw.
The discovery made by Smyslov is instruc
tive and pretty, and I th ink that it is of considerable importance for the theory of rook endings. But we no longer had time to verify it thoroughly.
{Many years later grandmaster Carsten
Muller nevertheless found a winning plan for
White. He suggested 2 '>t>e4 l:!.b4+ 3 �f5 l:!.b5+ 4 '>t>e6 (4 �g4 l:i.b4 is hopeless)
4 . . . 1:!b6+ 5 �d5 l:!.b5+ 6 �c6 l:!.b4 7 f5 tlg4 8
h6+ rtlh7 9 l:!.xb2 l:i.xg5 10 l:!.f2 etc. If Black
waits: 7 . .. .U.b8 8 h6+ �h 7, the most accurate
is 9 Wd5! (but not 9 �c5? .U.g8!) 9 ... l:!.b4 10
�e5 (because of zugzwang Black is forced to allow the king into the lower half of the board) 10 ... l:!.b5+ 1 1 �f4 l:!.b4+ 12 �g3 f!.b5 13 '>t>g4 .i:i.b3 14 �h4 with a decisive zugzwang.]
To the grandmaster's question, which plan of defence it would be better to choose, in reply I merely shrugged my shoulders.
Without waiting for advice, he said that he would think about it once more at the board . And he made h i s choice in favour of the main variation, which we had planned from the very start. Alas, it was here that a mistake had crept i n .
4 8 'it>f5 49 'lt>g5
50 h6!
.l:!f4+
l:i.f8
Here it all became clear to Smyslov. I n our analysis we had somewhere given a check on a?, after which there is no win . In sharp endings such as this, every tempo is precious - White leaves the king on h7, in order to advance his pawn to g6 with check.
50 . . . b4
51 l:txa4?
An unexpected amnesty at the very last moment. White could have won by 51 �h5!
b3 52 g5 l:tb8 53 g6+ 'it>h8 54 h7 'it>g7 (54 .. . b2 55 'it>h6) 55 l:ta7+ Wf6 56 g7.
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Adventures on Adjournment Day51 ...
52 .l:.a7+
.l::tb8
It is now pointless to play 52 �h5 b3 53 g5 b2 54 g6+ 'it>h8!.
Draw.
52 . . . 'it>h8 53l:ta2
54.l:.b2 55 'it>f4
b3 e4 'it>h7
That same day I too resumed by game (also a sharp endgame with passed pawns for both sides). It was adjourned before Smys
lov's game, and so I had managed to look at it, although , obviously, I no longer had time to check the variations.
V. Kozlov - D voretsky Tbilisi 1 976
Analysis showed that, amazingly enoug h , the position was a forced draw.
41l:txd1!
The sealed move.
41 ...
42 f6
tt:lxd1 .l:.a8
After 42 . . . tt:le3+ 43 .ixe3 dxe3 44 'it>f3 lla8 45 tt:lb3 .Ua3 46 tt:lc1 b3 47 tt:lxb3 llxb3 48 g6 .if8 49 tt:lxe5 Black is unable to convert his extra rook.
43 tt:lb3
If 43 g6 I was intending 43 . . . hxg5 44 hxg6 .l::txa 1 45 .ih6 .l::ta7! 46 f7 .l:.xf7 47 gxf7 b3. 1t later transpired that after 48 tt:lxe5 b2 49 tt:lc4! b 1 1i' 50 tt:lxd6 White does not lose, for example, 50 . . . 1i'a2+ 5 1 'it>g3 (51 'it>h3?
'iie6+ and 52 . . .'iVxh6) 5 1 . . .'iVf2+ 52 'it>h3 (52 'it>g4? tt:le3+) 52 . . .'ii'f3+ 53 'it>h4 'ii'f6+ 54 'it>h5. Apart from 45 .ih6, also possible is 45 tt:lh6 l:ta7 46 g7+ .Uxg7 47 fxg7+ 'it>xg7 48 tt:lf5+ 'it>g6 (48 . . . 'it>f6 49 tt:lxd6 b3 50 tt:le4+
'it>f5 5 1 .ib4 b2 52 tt:ld2) 49 tt:lxd6 b3 50 lt:Jc4 b2 5 1 tt:lxb2 tt:lxb2 52 'it>f3 tt:lxd3 53 'it>e4 or 52 .. . 'it>f5 53 'it>e2 .
43 ...
44 g6 45 hx g6 46 tt:lxe5!
l:ta3 hx g6
.itS
The simplest way to d raw. 46 tt:lc1 b3 47 tt:lxb3 :txb3 48 .ih6 tt:le3+ 49 .ixe3 dxe3 50 'it>f3 was also possible. I merely wanted to check whether my opponent might mix up
the move order by choosing 46 .ih6?. In this case after 46 .. . tt:le3+ 47 .ixe3 (47 tt:lxe3 .ixh6 48 tt:lf5 .if8 49 g7+ .ixg7 50 fxg7+
�h7 5 1 tt:lc5 b3) 47 . . . dxe3 48 tt:lc1 Black does not play 48 .. . b3? , but 48 . . . .U.c3!.
46... .l:tx b3
47 tt:lf7+
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1 0 1I was expecting 4 7 i..h6 �b2+ 4 8 'it h 3 (after
48 'it>g3 there is the u npleasant reply
48 ... �d6!, and if 49 lt::lg4, then 49 .. . �g2+! 50
�xg2 i.xf4) 48 . . . I:i.f2 49 i..xf8 .l:.xf6 50 .iL.xb4 with a drawn endgame. I n my analysis the move made by White in the game was not even made on the board , since I thought that after 47. . .<i£tg8 48 lt::lh6+ the exchange on h6 followed by playing the rook to f2 would retain Black's extra pawn. And when my opponent nevertheless went in for th is variation , I instantly (a typical mistake!) made the moves that I had planned before
hand.
You always have to reckon with the possibil
ity of 'holes' in your preparatory analysis -after all , not all its details will have been worked out with identical thoroughness.
Perhaps there was no point i n again checking all the previously prepared varia
tions, but at least I should have taken a fresh
look at the position, to avoid any bad oversight.
47 . . . 'it>g8
48lt::lh6+ i..xh6??
48 .. . <i£th8 was essential, with a d raw. The move i n the game should have lost after the interposition of 49 f7+!.
49 .iL.xh6??
50�g3
Now it is Black who wins.
�b2+
l:tf2
51 f7+ Ilxf7
52 gxf7+ <i£txf7 53 i..c1 <i£te6!
54 'it f3 lt::lc3!
55 'it12 b3
White resigned .
As you can see, tournament fortune was indeed on our side!
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Artur Yusupov