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Pavel Eljanov vs Yuri Aleksandrovich Kuzubov
Ukrainian Championship (2014), Lviv UKR, rd 6, Nov-16
Bogo-Indian Defense: Grünfeld Variation (E11)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-30-15  kubbybulin: 36...Be1 is quite the move. Chess is so fascinating. I looked at the position for a minute and knew what had to be played but I just couldn't get my mind around WHY it was correct. This is a temporal problem. The element of time is the most difficult aspect of chess for me to grasp. Rich game, forever beyond my grasp, forever teasing, forever taunting...
Dec-30-15  CHESSTTCAMPS: Black, temporarily down rook plus two pawns for a knight and queen, might be eager to grab white's queen for a bishop. But after 36... cxd3? 37.Nxc3, black's d-pawn is contained and a difficult fight remains. However, black can get an extra piece out of the transaction with a clever zwischenzug:

36... Be1+! 37.Kxe1 cxd3 and white can safely resign.

Dec-30-15  diagonalley: very instructive tuesday-ish puzzle
Dec-30-15
Premium Chessgames Member
  Gregor Samsa Mendel: OMG! <notyetagm> posted on this game

Eljanov vs Y Kuzubov, 2014

<TWICE> without using the <CHESS JARGON> term <ZWISCHENZUG> in his <TRADEMARK CAPS AND BRACKETS>!!!!

Dec-30-15
Premium Chessgames Member
  An Englishman: Good Evening: Slick little finish. The rest of the game has its interest, partly because this is the first time I've seen a Bogo-Indian transpose into a 1950s style classical KID with ...e5xd4.
Dec-30-15
Premium Chessgames Member
  patzer2: Took a minute or two to find 36...Be1+ for my Wednesday puzzle solution. This in-between move sets a pin which allows White only one minor piece for the exchange.

Taking the Queen right away with 36... cxd3? allows 37.Nxc3 f5 with two Knights for the Rook which puts the win in doubt.

White's game goes down hill with 24. f4?, allowing the win of a pawn with 24...Ngxe4 to . Instead, 24. Qd2 = holds it level.

Dec-30-15  Nick46: Yay, 3/3 so far this week.
Dec-30-15  stacase:   Sac the Bishop for a Queen and Knight? Looks like a good deal to me.  
Dec-30-15
Premium Chessgames Member
  agb2002: Black has a rook, a bishop and two pawns for a queen and two knights.

White threatens Qxc3, Qxc4, Nxc3 and Nxc4.

After the prosaic 36... cxd3 37.Nxc3 Rc8 38.Ned1 White seems to protect his weak spots reasonably well and threatens Ke3-Kxd3.

This, and the possibility of creating a skewer along the e-file, suggest 36... Be1+:

A) 37.Kxe1 cxd3 38.Kd2

A.1) 38... Re4 39.Kd3 Ra4 40.Nc2 b5 41.Kc3 Rc4+ (41... b4+ 42.Kb3 wins the rook) 41.Kd3 Rc5 42.Ne3 (42.Kd4 Rxc2) 42... Rc1 and the rook invades White's back rank.

A.2) 38... Rxe3 39.Kxe3 dxe2 40.Kxe2 b5 - + [P] reaches a won pawn ending.

B) 37.Kf1 cxd3 with the double threat dxe2 and Rxe3 ends up again with decisive material advantage.

C) 37.Kf3 cxd3 38.Nd4 Bxg3 wins decisive material (39.Kxg3 Rxe3+).

Dec-30-15  Sularus: 36. ... Be1+

If KxB:
37. KxB PxQ
38. N(2) any RxN+
etc

Dec-30-15
Premium Chessgames Member
  morfishine: <36...Be1+> leads to an exchange up won endgame

*****

Dec-30-15
Premium Chessgames Member
  Oxspawn: Only because it is a ‘position’ do I know not to play 36. …cxd3 immediately. I see that will lead to 37. Nxc3 and the black queenside pawns are ripe for plucking. There is only one other move that stops the queen escaping.

36. …Be1+
Now if the king takes the bishop, then after
37. cxd3, white can only save one of the knights leaving white with a knight and five pawns against rook and seven pawns. If white plays
37. Kf1 then after cxd3
the king has to take the bishop or black can play
38. d2 and one of the black pawns must surely queen

Over the board I would surely have played 36. cxd3 and lived to regret it.

Dec-30-15
Premium Chessgames Member
  Willber G: <stst: ... maneurvers (always a hard word to spell correctly!)>

Indeed:
manoeuvres (UK English)
maneuvers (US English)

Dec-30-15  dfcx: black has R + N against Q + 2N and can take the queen in next move. But after 36...cxd3 37.Nxc3 it's difficult to win.

Instead black should play
36...Be1+! 37.Kxe1 cxd3 wins another knight in the next move.

If white refuses the bishop black keeps the bishop and get the queen anyway.

Dec-30-15  Chess Dad: This is a good example of zwischenzug.

It was, from White's perspective, an easy queen exchange, after which he'd take Black's bishop and be up 2N vs R.

But Black didn't play the expected move.

On the other hand, I don't see a better move for White on 36. 36. Qxc3 leads to 36... Rxe3 37. Qxd3 Rxd3 and Black still has the R+2P vs N advantage.

So, is it still really zwischenzug if your opponent sees it coming, but is simply powerless to stop it?

Dec-30-15
Premium Chessgames Member
  kevin86: Black finds a way to sac a dead bishop and regain a knight in the process...kamikaze chess at its finest.
Dec-30-15
Premium Chessgames Member
  maxi: This combination is an example of a zwischenzug-counter-zwischenzug. Black plays 35...BxB to win a piece after 36.QxB RxN, so White plays the zwischenzug 36.QxQ and if 36...cxQ 37.NxB. But then Black plays the counter-zwischenzug 36...Be1+ which nevertheless wins a piece.
Dec-30-15
Premium Chessgames Member
  Longview: I really like the way that Kuzubov played his position in the end. It was a confusing game to follow with suggestion that Black changed his plan (moving his Knight back and forth) and lost a tempo that put him down the exchange we see at the outset of the puzzle. A much more difficult view would have been to start the question a couple of moves back. Nonetheless, I am pleased to say I saw it but really appreciate the contribution to the commentary by <abg2002> and <An Englishman> among many.
Dec-30-15
Premium Chessgames Member
  Jimfromprovidence: Here's a reasonable continuation after 36...Be1+: 37 Kxe1 cxd3 38 Kd2 dxe2 39 Kxe2.


click for larger view

Black's pawn structure is so good he can afford to sacrifice his rook for the knight as in 39...Rxe3 40 Kxe3 b5 and comfortably win as white's king cannot adequately cover both sides of the board.


click for larger view

Dec-30-15  scholes: Did black saw 36 ..Be1+ when he played 24 .. Nxe4, because otherwise he is very close to loosing
Dec-30-15
Premium Chessgames Member
  maxi: <scholes> After his nice 24.Nge4 I don't see how White can be in danger of losing. He is exchanging two pieces for R and Pawn, more or less even, but he is leaving all of White piece in disarray.
Dec-30-15  stst: < Willber G: <stst: ... maneurvers (always a hard word to spell correctly!)> Indeed:
manoeuvres (UK English)
maneuvers (US English)
>

Thanks Spelling Champ!!

<Now I got it: neu as in Fr/Deu, ver is straight Am, add o if Br. Of course, man is man!!>

Dec-30-15  Herma48852: Much easier that this Mon and Tue puzzle.

36. .. Be1+
37. Kxe1 cxd3
38. Kd2 [Nd3 Rxe3] dxe2

and Black is up exchange

Dec-30-15  dfcx: White missed the last chance to save game at move 35, after

35.Kf3 Bxc3 36.Qxd3 cxd3 37.Nxc3 the game is about even.

Jan-04-16
Premium Chessgames Member
  perfidious: <gsm> <that can't be!!!>
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