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Bartosz Socko vs Arkadij Naiditsch
Dresden Olympiad (2008), Dresden GER, rd 9, Nov-22
Gruenfeld Defense: Brinckmann Attack (D82)  ·  1/2-1/2

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Mar-04-11  consul: Yes <Cuew>, after snatching pawns black will win. I was looking for a neater advantage.
Mar-04-11  gofer: Compared to yesterday, this is a walk in the park!

<32 ... f4+>

33 Kh4 Be8+
34 Kh5 Rd5#

33 Kh2 g3+
34 Kg1 Nd3 winning as the both the rook and knight are immune!

(34 ... Rd5 looks good but is a draw 35 Kf1 Rh5 36 Ke1 Rh1+ 37 Bf1 Nd3+ 38 Ke2 Nxc1 39 Rxc1 etc)

35 Bxd3 e2+ 36 Rc5 Bxc5+ 37 Kh1 Rd1+ 38 Rxd1+ exd1=Q+ 39 Bf1 Qxf1# 35 Rxd2 exd3+ 37 Kf1 dxc1=Q+ 38 Bd1 Qxd1#
35 Kf1 Nxc1 36 Rxc1 Rxb2 winning easily

<33 Kxf4 Rxe2!>

(Kg3 Rd2 winning)

<34 Rxe2 Nd3+>
<35 Kg3 Nxc1> winning easily

<36 Re1 Nd2>
<37 Re2 f5>
<38 fxg4 f4+>
<39 Kf3 Bc7>
<40 Ke4 Nf2+>
<41 Kf3 Kg6>

Time to check...

Mar-04-11  tacticalmonster: 1) Black has was down an exchange for a knight and two pawns

2) Black has a passed e3 pawn and he wants to break the blockade of e2

3) The knight supports the advanced kingside pawns around White's weak King

4) Black's seventh rank rook attacks the e2 bishop and ties down the c1 rook to the defensive duty of c2 rook

5) Black's kingside has weakened b8-h2 diagonal and d8-h4 diagonals. If possible, Black also wants to open up the a7-g1 diagonal.

candidate: 32 f4+

a) 33 Kh4 Bd8+ 34 Kh5 Rd5#

b) 33 Kh2 g3+ 34 Kg1 Nd3! 35 Kf1 (35 Bxd3 e2+ 36 Kh1 Rd1+ 37 Rxd1 exd1=Q+ 38 Bf1 Qxf1#) Nxc1 36 Rxc1 Rxb2 Black is up three pawns with the initative

c) 33 Kxf4 Rxe2! 34 Rxe2 Nd3+ 35 Kg3 (35 Kxg4? Nxc1 36 Re1 e2! 37 Kg3 Be3 38 f4 Bd2 39 Rxc1 Bxc1 40 Kf2- Black is up a piece for a pawn) Nxc1 36 Rc2 Nxa2 37 Kxg4- Black has a won ending

Mar-04-11  tacticalmonster: Time spent: 15 min
Mar-04-11  morfishine: Had a hard time (1) deciding if Black was trying to win (2) or if Black was trying to draw and (3) fully grasping the macro spatial dynamics of the position. So, in full OTB mode, went with this:

32...Rxe2 33.Rxe2 f4+ 34.Kh2 g3+ 35.Kg1 f5 36.Rcc2 Ne4 37.fxe4 fxe4 38.Kf1 f3 39.gxf3 exf3 to get this Philidor-type position:


click for larger view

Is it right? Is it right?

No

Mar-04-11  Rama: Since white is nearly completely paralyzed I went for the quiet 33. ... Kg6, 34. ... Kg5, and now the f4+ push is supported.
Mar-04-11  truboy: just a starter ! any practice here ?
Mar-04-11  David2009: B Socko vs Naiditsch, 2008 Black 32...?

Black has two Pawns for the exchange, how to finish White off?

32...f4+ 33 Kh2 (if 33 Kh4 Bd8+ 34 Kh5 Rd5#) g3+ 35 Kg1 Rd5 threatening 36...Rh5 and 37...Rh1#. Giving back the exchange by 36 Bc4 Rh5 37 Rxf2 exf2+ 38 Kf1 Rh1+ 39 Ke2 Rxc1 40 Kd2 postpones the inevitable but loses. Time to check:
===
What a disaster! 0 points! The right first move for entirely wrong reasons! I didn't even notice 33 Kxf4 was legal, and my line breaks down with 35...Rd5?? (see below). The N fork combination after 33 Kxf4 is easy to see OTB, but that's not the point.


click for larger view

is the puzzle position colour reversed. Crafty End Game Trainer link: http://www.chessvideos.tv/endgame-t...

Playing the ending out against Crafty EGT we have (in normal colours) 32...f4+ 33 Kh2 g3+ 35 Kg1 to reach


click for larger view

Black to play and win. The win has already been posted by by <gofer> and <Phony Benoni>, I need only add that my proposed 35...Rd5 loses because White can play 36 Kf1 Rh5 37 Bc4 with a flight square. You can explore the win using the colours-reversed link given earlier.

Mar-04-11  knight knight: Friday, black to play, 2P + N for R.

I think this position is more about the precarious white king position rather than promotion of the e-pawn. One move to exploit this is 32...Rd4, also preventing white's threat of 33. Rxd2 exd2 34. Rf1 which looks winning for white. Black now threatens 33...f4+ 34. Kh4 Bd8+ 35. Kh5 Rd5#, or 34. Kh2 g3+ 35. Kg1 Rd6 36. Kf1 Rh6 37. Ke1 Rh1+ 38. Bf1 Nd3+ winning. Some possible replies:

a) 33. Rc4 f4+ is essentially the same line

b) 33. Bc4 f4+ 34. Kh4 Bd8+ 35. Kh5 Rd6 36. Rxf2 f5! white has to give up all his material - 37. Be6 Rxe6 38. Rc7+ Bxc7 39. Kg5 exf2

c) 33. Bc4 f4+ 34. Kh2 g3+ 35. Kg1 Rxc4! 36. Rxc4 e2 now 37...Nd1+ is a huge threat. If 37. Re1 Nd3+, or 37. Re4 Nxe4+

d) 33. Bf1 f4+ 34. Kh2 g3+ 35. Kg1 Rd6 36. Bc4 Rh6 37. Rxf2 exf2+ 38. Kf1 Rh1+ 39. Ke2 Rxc1 winning

e) 33. f4 Rd6 threatening 34...Rh6 and 35... Ne4#/h1+. So perhaps 34. Bf1 but then 34...Ne4+ 35. Kh2 Rh6+ 36. Kg1 e2+ is decisive

Let's see what happened...

Mar-04-11  Marmot PFL: Didn't find this - was looking at Ba7-Bb8+, similar to the Bd4-e5+ in the game, but white always has a draw.
Mar-04-11  knight knight: Missed it!
Mar-04-11  DarthStapler: I didn't get it
Mar-04-11
Premium Chessgames Member
  kevin86: It is unclear how this one was to end,but it appears that black missed a win-kind of like a LeBron jump shot.
Mar-04-11
Premium Chessgames Member
  patzer2: Think I'll put 32...d4+!! the winning move not played in my combined operations collection, since it runs into a winning Knight Fork or discovered check threat after 32... f4+ 33 Kh2 g3+ 34 Kg1 Nd3 (as <Dr. J> observes in his post).
Mar-04-11  YouRang: The idea of <32...f4+> presented itself immediately.

What are white's options?

1. <33.Kxf4> is most obvious and it doesn't take long to see that the K is ripe for a knight fork if only we could get our knight to d3, which is guarded by the Be2. Naturally, this prompts <33...Rxe2 34.Rxe2> and now <34...Nd3+> leaving black clearly better having two pieces and some pawns for a rook.

2. <33.Kh4> and it doesn't take long to see that this walks into a mating net: <33...d8+ 34.Kh5 Rd5#>.

3. <33.Kh2> is IMO was the trickiest variation. We can squeeze the K into a box with <33...g3+ 34.Kg1>.


click for larger view

I see now (having checked my work with a computer) that black's best continuation is 34...Nd3!. But the best I could think of was 33...Rd8, with the idea of swinging the rook around via 35...Rh8 and 36...Rh1+.

Of course during that time, white can take some defensive measures to avoid mate. Nevertheless, I think black ends up with a clearly better position, even if the best continuation itself is not so clear.

Mar-04-11  wals: Analysis by Rybka 4 x64: d21 : 9 min :

1. (-3.34): 32...f4+ 33.Kxf4 Rxe2[] 34.Rxe2 Nd3+[] 35.Ke4 Nxc1[] 36.Re1 Nxa2 37.fxg4 Nb4[] 38.b3 Bc5 39.Kf3 Kg6 40.Rd1 b6 41.Rc1 Nc6 42.Rh1 Ne5+ 43.Ke2 Nxg4 44.Rh3 Ne5 45.Rh4 Kf5 46.Rh5+ Kf4 47.g3+

Mar-04-11
Premium Chessgames Member
  agb2002: Black has a knight and two pawns for a rook.

White threatens fxg4.

The risky position of the white king suggests a direct attack with 32... f4+ 33.Kh2 (33.Kh4 Bd8+ 34.Kh5 Rd5#) g3+ 34.Kg1 Nd3:

A) 35.Bxd3 e2+ followed by 36... Rd1+ wins.

B) 35.Rxd2 exd2+ wins.

C) 35.Kf1 Nxc1 36.Rxc1 Rxb2 and Black should win the endgame by pushing the queen side pawns supported by the king.

Mar-04-11  cyclon: 32. -f4+ 33. Kh2 (Kxf4 Rxe2 34.Rxe2 Nd3+/Kh4 Bd8+ 34.Kh5 Rd5X)-g3+ 34.Kg1 Rd6 seems difficult for White; for example if Bishop moves - let's say to b5 - then 35.-Rh6 36.Rxf2 exf2+ 37.Kf1 Rh1+ winning a Rook.
Mar-04-11  stst: The problem of today's puz is that, all lines lead to some unclear complications. RxR, or f4+, or Rd8, or Nh1+, or RxB, or even Bc7+, each got its virtue and weakness.

Since f4+ is immediately met with KxP, it might be good first to go Rd4, but then W can go Rc4 trying to chase down for an exchange.

As some said, it's a walk in the Park, and the actual game ended in a draw. Though the general feel is Bk got some advantage.

Wonder if anybody got the engine's analysis?
What does Fritz say on this?

Could the Editor give something more definite next time?? << I know, then it wouldn't be that "difficult", eh?? >>

Mar-04-11  BOSTER: Here couple lines is a good example of a king being forced into hostile territory. Line1 32...f4+ if 33.Kh4 Bd8+ 34. Kh5 Rd5#
Line2. 32...f4+ if 33. Kxf4 Rxe2 34. Rxe2 Nd3+
35 Kxg4 Nxc1 36. Re1 e2 37.Rxc1 Bf2 and next e1=Q with win. Line3,when white king returned in his camp.
32....f4+ if 33.Kh2 g3+ 34. Kg1 Nd3 35.Bxd3 e2 36.Rc5 Rd1+ 37.Rxd1 Bxc5+ 38.Kh1 exd1=Q+
and mate after Bf1 Qxf1#.
I want to add. It looks like <CG> has changed something, because <Daily Puzzle> became more interesting, the variety is more obvious, and not so predictable.
Mar-04-11  TheBish: B Socko vs Naiditsch, 2008

Black to move (32...?) "Difficult"

Material is even (Black has knight and two pawns for White's second rook). It's important to find a forcing move here, as one of Black's attackers (Rd2) is about to be traded, which won't help Black's winning chances. The knight check in the corner does nothing, but the pawn check looks very strong, and in fact works wonders!

32...f4+! 33. Kh2

Also 33. Kxf4 Rxe2! 34. Rxe2 Nd3+ 35. Kxg4 Nxc1 36. Rc2 Nxa2 is winning for Black, as is 33. Kh4? Bd8+ 34. Kh5 Rd5#.

33...g3+ 34. Kg1

Originaly here I wanted to set up a mating net, shifting the rook over to the h-file via Rd6 or Rd5, but if 34...Rd6 35. Kf1 Rh6 36. Bb5 and there is no mate.

34...Nd3!

This move is crushing, as White has no good defense to the threat of 35...Nxc1. Neither rook can move without loss of material (35. Rxd2 exd2+ uncorks the bishop to powerful effect, as does 35. Bxd3 e3+ 36. Kh1 Rd1+ 37. Rxd1 exd1=Q+ 38. Bf1 Qxf1#), and the best White has is 35. Kf1 Nxc1 36. Rxc1 Rxb2, when Black is several pawns up with a crushing position.

Mar-04-11  M.Hassan: "Difficult" Black to play 32....?
A check in f4 by Black is tempting and obvious:

32...........f4+

Two lines may happen after this:
Line (A):
33.Kxf4 Rxf2
34.Rxf2 Nd3+
35.Kxg4 Nxc1
36.Re1 e2
37.Rxc1 Bf2
38.f4 e1=Q
39.Rxe1 Bxe1
Black has now a Bishop and 3 pawns 4 pawns of White. Black should win.

Line (B):
33.Kh2 g3+
34.Kg1 Rxe2
35.Rxe2 Nd3
36.R1c2 Nb4
37.Rc4 Nxa2
38.Rxf4
I think in this line, Black can not do much and IMO, White has the upper hand. Let's check see how the game continued
---------------
Miles different!!!. Though I think my line was not bad was it?

Mar-04-11  M.Hassan: One point: The puzzle move starts at move 32...?. The game finishes at move 51. It is a game to be played and hardly a puzzle.
Mar-04-11  WhiteRook48: I chose 32...f4+ but followed up with the wrong second move
Mar-05-11  fokers13: hm in the position posted by lostinspace i found a combination which i found to be quite interesting a4 Rxc1(Kf4?is impossible due to Nd3+)Ba4 Rc2 Bd2!!winning
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