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Salomon Flohr vs Aron Nimzowitsch
Bled (1931), Bled YUG, rd 2, Aug-24
Nimzo-Indian Defense: Classical. Milner-Barry Variation (E33)  ·  0-1
ANALYSIS [x]

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Kibitzer's Corner
Oct-04-10  Xeroxx: oh white messed that up badly.
Oct-04-10  Atking: Or Nimowitsch played it very well...
Oct-06-10  Xeroxx: You are right he did play well.

But white can hold a draw. (Its a quite tricky endgame for white though.)

Oct-06-10
Premium Chessgames Member
  whiteshark: <Xeroxx: ... <But white can hold a draw. (Its a quite tricky endgame for white though.)>>

Tricky endgame starts with <55.Bxb6>, right?


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Oct-06-10  Xeroxx: No that won't work. White already totally lost there.
Oct-06-10  Xeroxx: The general idea is that white should exchange the light square bishop for the knight. And get an opposite coloured ending where white can block the black pawns on the kingside with the dark bishop. Then it is an easy draw.

Also 35.f4 is way too ambitious. Maybe thats the key error since white can only hope for a draw at that point.

Oct-06-10  Atking: Xeroxx I agree on general termes (Try an opposite B ending even at the price of a pawn) but the position looks already difficult at move 35. Black planed Ng5 (d6-f7) and if White stops by h4 than Black has Kd6 for Ne5 and Be6. It's a torture. Maybe before. E.g 23.g4 eems to have more negative than positive point. Instead 23.f3 weaks g3 but White has the dark square B so the move makes sens 23...Qe7 24.Qe5 or 23...Qa8 24.Qd2 with your idea of BxN.
Oct-06-10
Premium Chessgames Member
  Sastre: <Xeroxx> How is White lost after <55.Bxb6 axb6 56.Kb5 Na7+ 57.Kxb6 Nc8+ 58.Kb7 c4 59.Kxc8 c3 60.a7 c2 61.a8=Q c1=Q+ 62.Kd8>? What is the winning line for Black after 55.Bxb6?
Oct-07-10
Premium Chessgames Member
  whiteshark: marginal note

I searched for <Bled> as file name on my computer, hoping to find a e-copy of the tournament book.

Results:

aside of zillions of enabled / disabled files,

bridge over troubled
PortableDevice
DoubleDigital
Albus Dumbledore

but no tournament book :(

Feb-03-12
Premium Chessgames Member
  Gypsy: <Sastre: ... How is White lost after <55.Bxb6 axb6 56.Kb5 Na7+ 57.Kxb6 Nc8+ 58.Kb7 c4 59.Kxc8 c3 60.a7 c2 61.a8=Q c1=Q+ 62.Kd8>?>

That is a very good question. I think this is a theoretical win for Black, but a difficult one. Let us take things from the top of the order:

(1) The suggested <57...Nc8+?> must be an error because it loses a key tempo. After eschewing the move, we get,

55.Bxb6! axb6 56.Kb5 Na7+ 57.Kxb6 <c4> 58.Kxa7 c3 ...

(2) At his point, <59.Kb7?> would be an error, as we will see shortly, but either <59.Kb6> or <59.Kb8> look playable. I am not sure which is better.

(3) After the K move, Black finishes the foot race a tempo up.

59...c2 60.a7 c1Q 61.a1Q...

(4) We can now see why <59.Kb7?> would have been a mistake: With White K on b7, Black would now been able to force an exchange of the queens (61...Qh1+) and transform the game into an easily won pawn endgame. With White K on either b6 or b8, however, it is not at all clear to me whether there is a sequence of checks that forces the desired Q swap.

(5) Therefore, it may be best for Black to keep White K cut off and immediately collect the h-pawn and put his trust into the Q+P vs Q endgame.

<61...Kxh6>

(6) Since (i) White K is cut off from the remaining pawn, and since (ii) this remaining pawn stands on the f-file, my endgame theory books claim that this Q ending is a forced win for Black.

(7) A couple of caveats: (a) There is nothing really easy about the winning process. (b) The theory book I rely on (Pachman's "Chess Endings for The Practical Player") predates table-bases.

Feb-03-12  RookFile: What's this? Nimzo won a game?

How did that happen?

Feb-03-12  Marmot PFL: There are many games like this by Nimzovich, where he successfully breaks Steinitz's "two bishops rule"-

<The great power of the two Bishops combined has already been alluded to. They are a little superior to Bishop and Knight and considerably stronger than two Knights. >

Maybe he bends the rule more than breaks it, he doesn't try to take on the Bishop pair with 2 Knights (at least not in any games that I know of offhand).

Similar games (restraint of the bishop pair) are still played today using Nimzovich's opening.

Nakamura vs Ponomariov, 2011

Feb-03-12  King Death: < RookFile: What's this? Nimzo won a game?

How did that happen?>

<CrowFilth>, maybe you explain how for us since you're so great. That would be a whole lot more useful than your spamming and trolling posts on every game of Nimzo's in the DB.

Feb-03-12  King Death: < Xeroxx: ...Also 35.f4 is way too ambitious. Maybe thats the key error since white can only hope for a draw at that point.>

In my opinion 35.f4 was the decisive mistake. Flohr had no chance of a win here and misjudged things when he tried to open the position up.

Apr-21-13  Everett: <Gypsy> Thank you kindly for the above work on this endgame.
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