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Alexander Kalantar vs Tigran V Petrosian
Erevan (1948)
Bogo-Indian Defense: Nimzowitsch Variation (E11)  ·  0-1

ANALYSIS [x]

FEN COPIED

Annotations by Peter Hugh Clarke.      [6 more games annotated by P H Clarke]

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Kibitzer's Corner
Jul-17-03  redherring: I dont know but I am left wondering if Petrosian knew the outcome of the game at move 17 thereabouts when he started liquidating. May be the weak pawn a e4 and the majority was obvious to him
Jul-18-03  drukenknight: oh stop. Yes it sometimes seem that these guys can work magic on the chess board but maybe that is just the nature of chess.

It does not seem that black will win with a passed f pawn since his B is the wrong color. (the queening square is different color)

what about white? cannot white create a passed pawn on the queen side? I dont know that it will win but at least it would be a way to counter act the passed pawn on the k side.

Look at 29...Bc8 this seems to lose a tempo, I thought the B was better on d7 where it can be used with ...a4 in order to stop the k side pawn.

Anyhow, what about 30 a3 in order to get things going on the k side?

Jul-19-03  redherring: On 30.a3 black might play ... a4. And then attack the c pawn with ... Ba6. May be that was the point of Bc8 after all. Black moves his B again only after White plays b3.
Sep-27-04  ArturoRivera: Zugswang?
Sep-28-04  crafty: 49. a4 ♔f4 50. ♔g1 ♔e3 51. ♔f1 f2   (eval -22.99; depth 14 ply; 25M nodes)
May-13-05  lentil: i think 20. f5?! may have been better; it boxes in the Black B and if B tries ..g6 he opens up lines for Ws Rooks
Nov-10-05
Premium Chessgames Member
  suenteus po 147: I don't think Petrosian knew the outcome of the game at move 17, but I would say that he was not at all surprised by the position he found himself at move 27.
Jun-03-07  fred lennox: excellent notes by peter clarke
Apr-12-09  blacksburg: nice demonstration of the <Buy One Get One> Indian Defense.

27...f5 seems counterintuitive to me, blocking the bishop. i probably wouldn't realize the strength of this move.

Jul-22-09
Premium Chessgames Member
  whiteshark: <37.Nf2!=>


click for larger view

Sep-23-09  xombie: I am revisiting this game after a few years, and I see it in a different light now, which may come from reading Nimzo's Chess Praxis, and some practical experience. Time and again, we see Petrosian (and Nimzo) creating outposts. Yet we all know how hard it is to attain this objective in practice. So it is clear that outposts have to be FORCED by restrictive tactics and pressure. In this case, it seems that 16. f4 was a positional blunder by white, and of course, black's preventive refutation is clear in retrospect with Peter Clarke's comments. I wonder what black would have done if not f4. Might have to do a good old think.
Oct-20-09  birthtimes: The decisive mistake in this game was White's 37th move. If 37. Nf2 Bc2 38. Kd2 Bb1 39. Kc1 Be4 40. Nxe4+ fxe4 41. Kd2 g4 then 42. Ke3 draws. Also, 37. Ne1 draws...
Aug-03-10  xombie: 27 ... f5 gets marked as ! without further comment. I've just had a brainwave regarding this move, which I shall share. It would of course be interesting to hear from the endgame experts here as to whether these are rather far fetched (but we know that these masters are capable of very good long-term thinking).

It appears that f5 is unsuitable since it blocks the B in the ending. However, there are two points that concern us. Firstly, black's e6 pawn is weak and could potentially come under attack from Ne4, should it land there (as was indicated). Secondly, while f5 blocks the c8-h3 diagonal, black's B still has other avenues (which is demonstrated later when the B moves to the h5-d1 diagonal. Thirdly, and this is very significant, the B finds a parking spot on e4 -which is a point that should have been obvious at the outset, extrapolating to the future course of the game.

With all these points taken together, I think f5 deserves more than a '!'. Positionally it is '!!'.

Dec-18-20
Premium Chessgames Member
  plang: 10 Re1 had been played in Pachman-Gligoric Prague 1946 (Black won); 10 Qc2 was new. 10 b3 followed by a3 and b4 looks more promising than what White played. The exchange on c5 was clearly in Black's favor.
Sep-03-21  K Any: 51...b3 is quicker.

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