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Laszlo Eperjesi vs Bela Perenyi
? (1980)
Benoni Defense: Classical Variation. Argentine Counterattack (A75)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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May-31-07  openingspecialist: I only looked at e6 and exchanging material on d6 either rook or pawn first but i saw e6 was much better and funnily enough i saw the line played before I looked at the solution. For those interested if e6 fxe6 then Qxg6+ and plan is N on g5 R or pawn on e6 and you can have my rook cause ill mate you too easily. Benoni is a line I don't know much about as i play nimzo-indian as black and i play king pawn as white. It didn't look too great from the start for black and the Queen and Knight retreat was almost instant death.
May-31-07  THE pawn: Seems hard at first, but you discard most options quickly, leaving only e6 as the logical plan.
May-31-07  azchess: my thought was along the line that e6 was possible b/c black's f-pawn was pinned by the threat of Qxg6, so let's put the N on g5 to make it a mate threat

29. e6 Nxb6
30. Ng5 Nxd5 (if fxe6 then 31. Qxg6+)
31. exf7+ Kg7
32. fxg8 (promote to N with +) Qxe8 (if K moved then Qxg6 with mate soon) 33. Rxe8 Rxe8
34. Nxd5
with two N and Q against R and B which should be overpowering for white

it seems the only kink in my line is black's 30. is there a better response than what I chose?

May-31-07  prinsallan: Well, I saw the first three moves. Tough one today.
May-31-07  greensfield: Got first <29.e6> move pretty much straight away. Then looked at line <31...fxe6 30.Qxg6+ Kh8 or ...Bg7>
May-31-07  erad1288: <azchess> 29. e6 Nxb6 30. Ng5 I believe gets met with ...f5! and now its not so easy to win. As a matter of fact, white will have to fight for a draw at that point.
May-31-07  Skylark: I got this. Seems like a textbook conversion of a positional advantage; white has a crushing spatial plus.
May-31-07  DP12: For me the line which made me go for it was 29.e6 N:b6 30 e:f7+ Kf7 31. Ng5+ Kf6 32. Ne4+ Kg7 33.Qc3+ Re5 34. a:b6 because at first I was thinking 34 f:e5 but then 34... N:d5 seemed pretty tricky.
May-31-07  spin: anyone want to throw 29...fxe6 30.Qxg6 in a computer? It doesn't look fun for black, but I don't see any immediate win...
May-31-07  eaglewing: How about 29. e6 Nxb6 30. exf7+ Kxf7 31. Ng5+ Qxg5 for defense? Advantage White for sure but maybe a bit more hope?

31. Ng5+ Qxg5 32. fg Nd7 with followup Ne5 to defend g6, if Re6 or Rf2+/Rf6. Q vs R+B and not yet a major intrusion by White around the Black King like in the game.

31. Ng5+ Qxg5 32. Rxe8 Rxe8 33.fg Nd7 similar, and an intrusion Qf2+/Qf6 is for the moment defended. Ne5 might not be played immediately depending on White's move. The question is, if some kind of fortress may be build, otherwise the advantage Q vs R+B (or R+N) should spell doom.

In the last variant Black might even opt for 31. Ng5+ Qxg5 32. Rxe8 Qf6 33. Rxb8 Nxd5 (Nxd5 Qd4+) giving the exchange for some initiative.

Or do you think the first variant is simply lost?

May-31-07
Premium Chessgames Member
  Gilmoy: Our ears perk up at Perenyi's name, as Judit Polgar has used his mad N-sac attack against Sicilian Najdorf to score some eye-popping wins, and she's now in the Candidates mix.

Saw 29.e6 and most of the complications, similar to <dzechiel>'s reasoning, except on 31.. Kg7 I figured -- Black is up an R, he'll gladly return an exchange to relieve pressure, so don't dangle an N on e -- 32.Re6 is instantly decisive, as it's untouchable by Nxe6+, and Black can't avoid Q(x)g6(+). Thus 31.. Kf6[] and now it's OK to dangle the other N to take sole possession of e. Then the Re6-Qg6 threat is on again, and it's strong enough to cost Black's Q.

From 16 to 22 Black was the aggresso^H^h^H^HWhite played a masterful rope-a-dope. Suddenly Perenyi channels Jim Marshall returning that fumble into his own end zone -- and ends up not only flat back, but *congested*. His K becomes his most developed piece -- like the old chestnut skit where the sergeant asks for a volunteer, and everybody except one guy takes a step backward ...

May-31-07  YouRang: I got as far as thinking: "29. e6 is probably the first move", and that "deflecting the f7 pawn to threaten Qxg6 would be nice", and "Hey, g5 looks like a great square for the knight". But I surely didn't see how to make these brilliant ideas sing together. :-(

Kinda hard for a Thursday. More like Thursday and a half. ;-)

I do like the final position, though, where white threatens the rook AND mate (Qe5#). It's very impressive if white saw this way back at move 29.

May-31-07  Richerby: <spin: anyone want to throw 29...fxe6 30.Qxg6 in a computer?>

Fritz 8 does very badly on this position. To 15 ply, it's scoring it as -1.00 (i.e., *black* ahead by a pawn). Oh, wait. I forgot to give white his ♘f3!

Let's try that again... 29... fxe6 30.♕xg6+ ♗g7 31.♘g5 +4.25 to 14 ply (my computer is old and slow and I have to go.)

May-31-07
Premium Chessgames Member
  kevin86: Too bad-I gave up on e6 because I didn't want to abandon the hold on f6. As it turns out,f6 is quite irrelevent as white takes over many more other squares.

The final move threatens the rook and 40 Qe5 mate. Nc6 guards both but falls to the devastating 40 e7+

May-31-07  newton296: tuff 1 for me . there are some many possible lines to check . Still I came up with the first 3 moves by reasoning that the if I could kill the f7 pawn then I get Qxg6+ for an easy win . I didnt see blacks desperate 31)...kf6!? fleeing forward not back . I guess it was easy to refute anyway so I figure I would have found the obvious ne4+ follow up. score it solve I say if u got the first 3 moves!
May-31-07
Premium Chessgames Member
  playground player: Just wondering: can't you play Ng5 before playing e6?
May-31-07  IMDONE4: I found everything up to the queen sac, and didnt think of going further.
May-31-07
Premium Chessgames Member
  patzer2: The deflection 29. e6! initiates a winning attack on Black's weakened castled position.
May-31-07  xroot: Newbie question: I don't understand 33...Qd7. Why can't he play Nxd5?
May-31-07
Premium Chessgames Member
  WannaBe: <xroot> 33...Nxd5 is bad, because white can play 44. Re6+ Kg7 (forced) 45. Qxg6 which I believe would be mate.
May-31-07  xroot: Oh, duh. That would leave h8 and Qh7 mate. Thanks.
Jun-01-07  Kneesocks: I got the first few moves. Sometimes its hard to figure things out after the moves for the loser are no longer forced. But I guess this is what the secret to getting better is all about.
Jun-01-07  azchess: <erad1288> Thanks for your comments. starting with
29. e6 Nxb6
30. Ng5
My response to 30... f5 would be 31. Qxg6+ Bg7 32. Qf7+ Kh8 33. e7

(a) 33... Rg8 34. Qxh5+ & mate soon
(b) 33... Rxe7 34. Rxe7 and the best black can hope for is white with Q and 2N's against black's R,N,B (c) 33... Qd7 34. Qxh5+ Kg8 35. Qh7#

am I missing something?

Jun-16-07  erad1288: <azcess> after 30... f5 there would be no Qxg6+ so black could ward off the attack.
Jun-16-07  erad1288: 30... f5 in your variation closes the b1h7 diagonal from the queen
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