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Roman Dzindzichashvili vs Ljubomir Ljubojevic
Interpolis 9th (1985), Tilburg NED, rd 1, Aug-28
Hungarian Opening: General (A00)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 4 ·  Later Kibitzing>
Jul-10-10  chesskidnate: omg is it 1(forgot starting pos. #). Nxa6 Nxa6 2.Kb5 Nb8 3.a6 winning
Jul-10-10  wladimirsky: 37. Nxa6. So I canīt understand why this is difficult. Not only is it not Saturday level, it is more like Tuesday level.

It must be that CG used a machines, not a human to rate this problemīs difficulty. Only that can explain the difficulty rating on this one. Or the human had not had coffee.

Jul-10-10  MaxxLange: ouch!
Jul-10-10  chesskidnate: ya I will admit the solution almost seems to jump out from the board
Jul-10-10
Premium Chessgames Member
  zenpharaohs: I got Nxa6 and immediately found others here agreeing with me that it seems easy. Maybe we missed a line for Black?
Jul-10-10  zooter: Surely this is too easy for a Saturday

After 37.Nxa6 Nxa6 38.Kb5 Nb8 39.a6 it's all over for black due to the c-pawn falling after the knight is given back for the a-pawn

Interestingly "Ljubojevic" didn't win this time as he's credited with the saying -- "I win when I'm white and with black I win because I'm Ljubojevic"

Jul-10-10
Premium Chessgames Member
  Phony Benoni: <zooter> That saying has probably been attributed to more Masters than any other. I've definitely heard it quoted from Chigorin and Bogolyubov as well. This is probably because, deep down, every Master believes it.

But getting back to the puzzle, I don't see the difficulty either. No stalemate possibilities, and no possible breakthroughs for Black on the kingside with king or pawns. His king can't get back in time to guard the c-pawn. The best he can do is make White capture it on c4, but that doesn't seem to make any difference.

Jul-10-10  drnooo: if Lubo said I win with white etc etc as in the previous comment, he ripped off Bogulubov , the fat man was the one who said it first, just as Chaplin was the first to wear Hitlers mustache.
Jul-10-10
Premium Chessgames Member
  Phony Benoni: Actually, I'm beginning to wonder if there's some sort of typo in the game score. After all, in this position why would Black play 36...Kg6?


click for larger view

That seems totally futile, even if White didn't have the easy win. However, if Black played the more logical-looking 36...Ke8 instead:


click for larger view

Now I think 37.Nxa6 probably still wins, but it would be a lot more difficult.

I shall watch the efforts of our resident geniuses with interest.

Jul-10-10  CHESSTTCAMPS: On first look, I had an immediate candidate for this N&P ending. Back has an extra pawn that is doubled and meaningless in this position (unlike yesterday's puzzle, where the doubled b4 pawn was all important). In view of the big advantage in king position and knight mobility, white can grab the a-pawn immediately and force a liquidation that leaves a won K&P ending.

37.Nxa6!

A) 37... Nxa6 38.Kb5 Nb8 39.a6 Nxa6 40.Kxa6 and white will grab black's c-pawn and promote his.

A.1) 39... c6+ 40.Kb6 Nd7+ 41.Kxc6 is no better for black.

B) 37... Nd7+ 38.Kc6 Nf6 39.Nxc7 Nxe4 40.a6 Nxc3 41.a7 wins.

I can't find any serious defensive chances for black. Time to check.

Jul-10-10
Premium Chessgames Member
  OBIT: In a puzzle position like this, the answer is always NxP. Heck, in this position it even looks fairly obvious, considering (a) how well posted the White king is (b) how close to promotion the White a-pawn is, and (c) how inept knights generally are at stopping passed pawns. After 37. Nxa6 Nxa6 38. Kc6, with Kb7 threatened, I don't think it is too early to resign.
Jul-10-10  gprice: <Phony Benoni:> I think


click for larger view

37. Nd3 requires black's king to stay
near f6.
Now 37... Nd7+ to save the pawn leads
to 38. Kc6 39.Kb7 40.Kxa6

Jul-10-10
Premium Chessgames Member
  Jimfromprovidence: I did not find this puzzle easy, because there is more to it than meets the eye.

After 37 Nxa6 Nxa6+ 38 Kb5 Nb8 39 a6 Nxa6 40 Kxa6 below, only a very experienced player should see a clear win for white.


click for larger view

Specifically, after 40...Kf6 41 Kb7 c5, below, it turns out that white has the opposition. For me, being able to apply that technique to that position is frankly beyond my current knowledge of the game.


click for larger view

Jul-10-10
Premium Chessgames Member
  dzechiel: White to move (37?). Material even. "Very Difficult."

Black's doubled, isolated e-pawns, and the remote position of the black king will make the difference here.

The line I see goes:

37 Nxa6

Now black can either take the knight, or move his own knight. Other moves lose instantly. Let's look at the capture first.

37...Nxa6+ 38 Kb5

On the black knight.

38...Nb8

The only safe square.

39 a6

With the threat of 40 a7 and 41 a8=Q.

39...Nd7

Taking the pawn right away seems to lose faster, eg: 39...Nxa6 40 Kxa6 Kf2 41 Kb2 and the a-pawn will promote.

40 Kc6 Nb6

Should black play 40...Nb8+ then 41 Kb7 will transpose to lines above.

41 Kxc7

and, at best, black will have to give the knight up for the a-pawn, and at worse, he will be unable to stop the a-pawn from promoting.

OK, what about moving the knight instead? On...

37...Nd7+ 38 Kc6

Black already looks busted to me. He's lost the a-pawn, and the c-pawn will be right behind. Then white's a-pawn gets underway. Even trying for white's e-pawn with

38...Nf6 39 Nxc7 Nxe4 40 a6 Nxf2 41 a7 e4 42 a8=Q

and it's all over. I think this is it. Time to check.

=====

Spot on. If you don't see my posts for the next week or so, it's 'cause I'm in Hawaii with the family. We are taking a cruise from Oahu to Maui to Hawaii to Kauai then back to Oahu. I'll tell you all about it on my return.

Jul-10-10
Premium Chessgames Member
  OBIT: Well, I suppose I did that a little too quickly, missing the more efficient 38. Kb5, but 38. Kc6 also works. The main line looks like 38. Kc6 Kf7 39. Kb7 Nc5+ 40. Kxc7 Ke7 41. Kc6 Na6 (or 41...Nd7 42. a6 Nb8+ Kb7 43. Nxa6 Kxa6 and wins by promoting the c-pawn) 42. Kb6 Nb8 43. a6 and wins.
Jul-10-10
Premium Chessgames Member
  Phony Benoni: Ah! I knew our esteemed solvers would be able to find difficulties where none seemed to exist!

I have trouble with these puzzles because I'm too inclined to snap at a pretty idea without bothering to figure it out carefully. Usually works over the board, but I leave an awful lot of points lying around here.

Jul-10-10
Premium Chessgames Member
  OBIT: <Jim>The king and pawn ending after 41...c5 seems easy enough. White just eliminates the c-pawn, then pushes his passed c-pawn. A sample continuation is 42. Kc6 c4 43. Kc5 Ke7 44. Kxc4 Kd6 45. Kb5 Kc7 46. Kc5. If the c-pawn doesn't do Black in, the loss of all his kingside pawns will.
Jul-10-10  scormus: Oh, and I was so looking forward to another Najdorf :(

I'll stick my neck out here and go for 37 Nxa6 Nxa6+ 38 Kc6. Then B's only chance looks like 38 .... Kf7. So 39 Kb7 Nc5+ 40 Kxc7 and WK controls all the important squares e.g. 40 ... Ke7 41 Kc6 Nd7 42 a6 Nb8+ 43 Kb7 Nxa6 44 Kxa6 Kd6 45 Kb6 etc. The only player who might not win from here is ..... me

Now check

Jul-10-10
Premium Chessgames Member
  dzechiel: <Jimfromprovidence: ... after 40...Kf6 41 Kb7 c5, below, it turns out that white has the opposition. For me, being able to apply that technique to that position is frankly beyond my current knowledge of the game.>

Due to the doubled, isolated black e-pawns, I think this position is won for white even if the c-pawns were off the board, eg:


click for larger view

White's strategy is to run black out of moves and attack the black e-pawns. Something like...

42 Kc7 Ke7 43 Kc6 Ke8 44 Kd6 Kf7 45 Kd7

White getting the opposition.

45...h5

Black gets the opposition.

46 Kd6 Kf6 47 Kc6 Ke7 48 Kc7

White gets the opposition once again.

48...Kf7 49 Kd7 Kf6 50 Ke8

followed by 51 Ke7 and white gobbles up the e-pawns. Having the c-pawns on the board does not affect this line of attack (but it's probably easier to just go after the c-pawn to start with).

Jul-10-10  scormus: 1-0 immediately :O

I agree it looks easier than most Saturdays, so is there more than meets the eye or CG making it easy on us after last week?

<Phony Benoni> I am too lazy to play it through first but I was thinking all along how much more difficult it would be for W if the BK was nearer the action. After 36 ... Ke8 I'm not sure if the game move wins. I'll be interested to see what the others say

Jul-10-10  amathus: Phony Benoni:Now I think 37.Nxa6 probably still wins, but it would be a lot more difficult.

If 36..Ke8 the idea of 37Nxa6 I dont think it works. I thought in this case the crazy 37 Nd5 exd5 38.Kxd5 Nd7 39.Ke6 and the king intrudes to harvest the weak black pawns in the king side...

Jul-10-10
Premium Chessgames Member
  al wazir: Did anybody looking at this problem *not* see the answer? White's objective was clear (promote a ♙) and there was an obvious approach to reaching it (sac a ♘ to create a passer, then use the ♔ to drive away black's ♘). There were no sucker moves to trap the unwary, no long, debatable continuations requiring elaborate analysis like yesterday's problem. And then black resigned after one move.

This was a gift.

Jul-10-10
Premium Chessgames Member
  Once: <Once> upon a time, if you will forgive the pun, there were three little pigs...

And if that had been all, there would have been no story. Because every story needs conflict, danger, a challenge to the status quo, an enemy. Step forward, the nasty toothsome Mr Wolf, who sometimes travels under the alias of Mr Wooluff.

BOO! HISS!

Mr Wooluff is simultaneously higher up the food chain than the three pigs (because he is their natural predator) and lower down the evolutionary ladder (because he is still a hunter-gatherer whilst they have developed agrarian technologies).

In other words, Mr Wooluff wants to eat the three little pigs...

BOO! HISS!

Don't worry, boys and girls, because the three little pigs have a cunning plan. They have consulted building regulations, made the requisite planning applications and intend to build a row of wooluff-proof dwellings.

HURRAY!

Today's POTD is about three fortresses - one built of granite, one built of wood and one made of straw. And why did black play the mysterious 36...Kg6?

The fortress made of granite is the white pawn foursome of e4, f2, g3, h2. If you squint hard enough, the f, g and h pawns even look a little like a house. Well they do to me, but as you know I am a little weird. No matter how hard the black king and h pawn try to huff and puff, they won't blow this one down. There are no entry points for the black king and h5-h4 just gets black nowhere. The h pawn will either have to exchange on g3, when white would recapture and keep the fortress intact, or run into h3, when again the fortress is impregnable. The building inspector pronounces this fortress as sound.

The fortress made of wood is black's cunning plan to protect the weak e5 pawn. He played 36...Kg6 so that if white attacks e5 with 37. Nd3 he can defend it with 37...Kf6. Then after both sides make a pawn move the white knight or white king have to retreat and black can repeat the position. He doesn't play 36...Kf6 to protect the pawn straight away, as then white would play Nd3 and it is black who has to waste moves. Clever little pig!

But the house made of straw is black's fortress in the top left-hand corner of the board. The black Nb8 plus pawns on a6, c7, e6 and e5 create a barrier of squares that the white king cannot enter.

At first glance, it sounds good and we have one smug little porker waving through the window at Mr Wooluff. But this fortress only works if everyone stands absolutely stock still. If anyone moves, the whole edifice falls to the ground. The buildings inspector is making a tut-tut sound and scribbling lots of notes on his clipboard.

And the rest you know. 37. Nxa6 is the huff and puff which will bring the house down. 37. Nc6 doesn't do the trick as black plays 37...Nd7+ and the white king has to give way. But as soon as 37. Nxa6 forces the Nb8 to move the defences are shattered and the white king invades. It's bacon butties for breakfast, sausage for lunch and pork casserole for supper. Yum yum.

One final thought. After 37...Nxa6 my preference would be to play Kc6, Kb7 and Kxc7 before pushing the a pawn. Other kibitzers have prefered the more direct Kb5 and a6 route. But for me, I'd rather see the c pawn gone sooner rather than later so that black has fewer tricks.

Jul-10-10
Premium Chessgames Member
  Once: <al wazir: Did anybody looking at this problem *not* see the answer?>

So far, no! But I wonder...

In POTD mode we are conditioned to look for sacrifices and that makes 37. Nxa6 pretty easy to spot.

But in the real world, the world outside the matrix, sacs don't work anywhere near as often. In the real world, Neo can't fly, Trinity can't run up walls and Morpheus' sunglasses would fall off his nose.

And in the real world how many of us would be afraid to throw away our last piece and would try 37. Nc6 instead?

I would like to think that OTB I would play 37. Nxa6. But in the heat of battle with the tock clicking, I wouldn't lay money on it.

For my money, this was an easier puzzle for us to solve than it would have been OTB for the players.

Jul-10-10  randyjohnson: woow find in 10 second!!! :)
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