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Le Quang Liem vs Peter Leko
Dortmund Sparkassen (2010), Dortmund GER, rd 9, Jul-24
Semi-Slav Defense: Stoltz Variation (D45)  ·  1/2-1/2

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Jul-24-10
Premium Chessgames Member
  Peligroso Patzer: It is a little surprising to me that Lékó tried to win by steering play into a R+P vs. R endgame. As reflected in several comments I posted at Dortmund (2010), it seemed that if he could have obtained a pawnless R+B vs. R, that might have offered the best practical chance to win.
Jul-24-10
Premium Chessgames Member
  Peligroso Patzer: Another interesting practical try would have been in the position after 75. Kg3:


click for larger view

to sacrifice the exchange with 75. ... Bxf3 76. Rxb3 Bxe2 resulting in this position:


click for larger view

Apparently it is a theoretical draw, but I would think that the connected passers would give practical chances, especially since this is an endgame that is probably not studied very much.

Jul-24-10  Bridgeburner:

Good point, seeing as even without the pawns it's a theoretical draw.

Jul-24-10
Premium Chessgames Member
  Peligroso Patzer: <Bridgeburner: Good point, seeing as <even without the pawns> it's a theoretical draw.>

It is difficult to make sense of your comparison to a position <"without the pawns">, which is obviously a theoretical draw. The point of my comment was that with two connected passers, <the side with the Bishop> may have winning chances. For example, the following position, with Black to move, is a win (for Black):


click for larger view

Jul-25-10  Bridgeburner: <Peligroso Patzer>

I was agreeing with your point that Leko might have tried a different strategy, in this case saccing the exchange toward a B+2P v R ending.

If it's a theoretical draw without the pawns, then <I agree> that the ending with B+2P might have provided practical chances to win, even though it is still <apparently a theoretical draw>.

Jul-25-10
Premium Chessgames Member
  tamar: <Peligroso Patzer> The key to White's defense would appear to be access to f3 square in case of e3.

For example, Black can advance his pawns from your original diagram without much trouble, and then set up King and Bishop on the 4th rank


click for larger view

Here only Kf2 draws

Jul-25-10  Bridgeburner: <tamar>

There is now a LSB in your FEN.

Jul-25-10
Premium Chessgames Member
  tamar: <Bridgeburner> No mystery. Leko would have been left with a LSB in the game.

I tried to find the most favorable position Black could force after PP's suggestion 75...Bxf3 76 Rxb3 Bxe2

White must avoid the back rank with his King. But f2 appears to be the King's drawing square.

Jul-25-10  Bridgeburner: <tamar>

You're right. I was looking at the wrong diagram (the one immediately prior to my previous post).

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