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Karel Opocensky vs Aron Nimzowitsch
Marienbad (1925), Marianske Lazne CSR, rd 3, May-24
Nimzo-Indian Defense: Classical Variation (E32)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Jun-14-05  Warrush: Nimzo always wins
Jun-14-05  aw1988: No, not always. Nimzo was a good player, but failed to the likes of Lasker Capablanca and Alekhine.
Feb-18-07  ChessDude33: White didn't seem to plan very well, he had a nice queenside position but then decided to go for a kingside attack for no good reason.

After his atack failed he then goes back to the queenside only to be to be routed against nimzo's attack, nice game.

Feb-27-07  shalgo: <ChessDude33> I agree. And, more importantly, so does Pachman. He says that White is virtually winning by move 11 and that he should have continued with h3, Be3 and Na4 to prepare c5.
Aug-05-08  whitebeach: I don't think Opo was wrong to try for a kingside attack, I just think he executed it with weak moves and little energy.

First, instead of 19. Rfd1, he should have played Rfe1. And if then 19 . . .Rc7 20. h4 cxd5 as in the game, then 21. exd5.

In "My System" Nimzo says that if 21. exd5 then 21 . . . Nf6. Of course, in the game the rook was on d1. With it on e1, after 21 . . . Nf6 22. Ng5?!, pinning the Nf6 to the mate threat on h7.

If then, say, 22 . . . Qd7, then 23. Rxe5! is very promising. After 23 . . . dxe5 24. Bxe5 Nge8 (forced), white is down a rook for two pawns but has a monster attacking position, while black's pieces are either pinned or blocking one another in every direction.

White could of course immediately get a rook for a bishop, but that would be a terrible waste in this position. Simply 25. Re1 sets in play a host of threats (Bf5, Nf5, d6, h5), and black won't be able to meet them all.

Apr-07-12  bystander: My sillicon monster does not like 28)...fg5x. It gives al very long line, where queens are exchanged. 28)...fg5x? 29)hg5x, Lc8 30) ♘e5x (instead of 30 ♖c6), de5x 31)♗e5x, ♗g5x 32) ♖c8x ♗e3x 33)♖d8x, ♗f2x 34) ♔g2, ♖f8x 35) ♔f2. After this very long line my computer asses the remaining endgame as favourable for black. Any thoughts on this line/endgame? Instead of 28)..fg5x? the computer recommands 28)...b5.
Apr-07-12  bystander: According to my computer, after 39)...♘h6 the game is drawisch. 40) ab6x is regarded as a big mistake, giving black the decisive advantage. it's very hard to explain in my own words, why 40)ab6x? is such a terrible mistake? The suggestion of my computer is 40) Ne2 with more or less a draw. White attacks the night on h6 and 40)..Ng4 can now be met with check. 40)...ba5x won't hurt white much either, because of two strong passed pawns. After 14) Bc8 (to exchange a night on g4, it is drawisch too.
Mar-05-13  wachter123680: Opocensky lost at 31. probable by giving up his rook for no material advantage. a blunder? Nimzo even gives him back the favor 8 moves later!! And if Opo. 2. Bg5, take that knight which ended up holding out to the endgame. but its funny because that dark squared bishop was the gift trade in Nimzo's accepted rook for bishop trade on move 38. And.. opo. doesn't defend his queen at 41 where it was needed on back rank..? Also, Opo. was sacrificing for almost no positional advantage, and his pawn work on f, g, and h was insane and not merited by the loss of king safety.
Dec-11-23
Premium Chessgames Member
  kingscrusher: 37.Bc8 seems to be winning for White:

Karel Opocensky - Aron Nimzowitsch 0-1 3.0, Marienbad Marianske Lazne CSR 1925


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Analysis by Stockfish 16 - 2 cores only:

1. ± (1.53): 37...Ng5 38.Nh2 Bc7 39.Bg4 Qf4 40.Bc1 Kh7 41.Qe1 Qf6 42.Be3 d5 43.exd5 Nxh6 44.Qd2 Nxg4 45.Nxg4 Nf3+ 46.Kg2 Qe7 47.d6 Bxd6 White is clearly better

(Gavriel, 11.12.2023)

Whilst 37.Nxe5 seems a big mistake by contrast.

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