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Vugar Gashimov vs Ruslan Ponomariov
World Cup (2011), Khanty-Mansiysk RUS, rd 5, Sep-10
Spanish Game: Berlin Defense. l'Hermet Variation Berlin Wall Defense (C67)  ·  0-1


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Kibitzer's Corner
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Premium Chessgames Member
  wordfunph: 99...Kb1 is the quickest way to win, why he played for 99...Kc1?
Sep-10-11  leprechaunz: its a matter of timing or zugzwang how to put his knight on a3 so that his king can get out on a1
Sep-10-11  leprechaunz: if pono cant get the timing, its a draw, white king on c1 and c2
Sep-10-11  jakaiden: Gashimov is shaking his head no!!!
Premium Chessgames Member
  Gregor Samsa Mendel: It's over.
Premium Chessgames Member
  twinlark: Gashimov is going to be appalled by how comprehensively he misplayed the endgame, just to rub insult into the injury of losing.
Sep-10-11  stoolepigeon: Game Over. That sucks for Vugar....such a showing and lose it close to a draw and finishing in the top or even winning it all.
Sep-10-11  leprechaunz: pono got the timing, congratz
Premium Chessgames Member
  wordfunph: 0-1 and lost my $200 chessbucks :(
Premium Chessgames Member
  YouRang: It is kind of a delicate position. Black's K can't just charge in and take the B until the white K is kept at distance and on the right colored square. For example, the following position is a draw:

click for larger view

The white K can just jump between c2 and c1 (i.e. one light square and one dark square), allowing only the black N to move. But it must jump from light squares to dark squares, and it can never be on the color it needs to be on to kick the white K away!

Premium Chessgames Member
  Gilmoy: Q: How does a Knight stop a K from shuffling Kc1-Kc2?

A: Nd3! zugzwang

Premium Chessgames Member
  whiteshark: Oh noooo, what a pity for my friend. Very sad. :((
Sep-10-11  leprechaunz: thats why pono did not take the bishop immediately, he needs timing
Premium Chessgames Member
  Administrator: Thanks to everyone for watching and commenting on today's games. We will bring you the first two games of the Ivanchuk-Radjabov tiebreak tomorrow at 5:am USA/Eastern time. Hope that you can join us then.
Premium Chessgames Member
  YouRang: In my diagram above, I should have mentioned that this position was a draw <with black to move>.
Premium Chessgames Member
  YouRang: A little puzzle related to this endgame:

White to move, but where -- c1 or c2?

click for larger view

Answer: c1!

White wants to put his K on the same colored square that the black N is on. It will be that way for the rest of the game as white toggles between c1(dark) and c2(light) and the knight hops from dark to light.

The N can put the K in check, but this just pushes the K from c1 to c2, or from c2 to c1. Then the poor N, unable to stay put or triangulate, must hop away, allowing the K to return to where it was.

Sep-10-11  Winsome Knight: Nice one <YouRang>. Really Instructive.
Sep-10-11  Akavall: Instructive position indeed. It is interesting that a couple of days ago I was flipping through Averbakh's endgame manual, and came across this position. I liked the logic of it, but wondered about the practical usefulness of this. It is nice to know that this is actually quite useful knowledge as this exact theme just showed in a GM game.
Sep-10-11  Akavall: Another position where K + N + P can't win against a lone king is:

click for larger view

White can't make any progress, since the king can't come close to the pawn, say, if the King goes to b6 it is a stalemate. Therefore the knight has to protect the pawn, and white is stuck. All black has to do is move the king between a8 and b7.

Sep-10-11  sevenseaman: A clever win. Pono is a wizard!
Sep-10-11  JamesT Kirk: 20.Nf5!? / Nf5!!
Sep-13-11  27xx: Could Black win if White played 100.Ke1 instead of 100.Kd3?
Sep-13-11  TugasKamagong: So this is what they call the Horwitz Manoeuvre. As GM Dr. Karsten Müller says, Ponomariov certainly knew the classical winning technique.

Sep-13-11  27xx: According to GM Dr. Karsten Müller:
100.Ke1 Nc5 101.Ke2 Kb1 102.Kd2 Nb3 and Black win

But what if White play 102.Kd1 instead of 102.Kd2?

102.Kd1 Kxa1 103.Kc1 --> draw
102.Kd1 Nb3 103.Bh8 --> draw

I still believe that White could hold if play exactly.

Premium Chessgames Member
  Fusilli: <<27xx>: According to GM Dr. Karsten Müller: 100.Ke1 Nc5 101.Ke2 Kb1 102.Kd2 Nb3 and Black win

But what if White play 102.Kd1 instead of 102.Kd2?>

Pal Benko answers your question in the January 2012 issue of Chess Life:

click for larger view

100.Ke1 Nc5 101.Ke2 Kb1 102.Kd1 Na4 103.Kd2 Nb2 104.Kc3 Kxa1 105.Kc2 Nd3 wins. (Just as in the actual game.)

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