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Vasyl Ivanchuk vs Liviu-Dieter Nisipeanu
Kings' Tournament (2012), Bucharest ROU, rd 1, Nov-07
Nimzo-Indian Defense: Classical Variation. Vitolinsh-Adorjan Gambit (E32)  ·  1-0

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Kibitzer's Corner
Nov-07-12
Premium Chessgames Member
  Stonehenge: Two games with 15. Bg3:

E Arlandi vs V Tukmakov, 2001

and http://www.365chess.com/game.php?gi...

Nov-08-12  kia0708: good play from Nisipeanu, but not good enough against the old horse Ivanchuk
Nov-08-12  kstokelyk: Very instructive to watch how 12. ... d6? allows 20. a4! and white is completely in control. The database doesn't have a single win for black with 12. ... d6
Nov-10-12  ounos: 20. a4! is sweet tactical point
Nov-10-12  ounos: <kstokelyk> I don't see the connection of 12. ...d6 and 20. a4 -- the latter was directly enabled by 19. ...Rab8, exposing the a6 pawn, and indirectly by the earlier Bc2
Dec-04-12  kstokelyk: To my novice eye it looks like the d6 pawn became the first exploitable weakness in black's position. After move 12 white immediately sets about attacking that pawn and forcing black into an awkward position defending it. All of black's moves look like they're trying to defend that pawn either indirectly or directly without resorting to the passive Ne8 like he finally had to. Even 19. ... Rab8 was part of defending the d6 pawn (and the c2 bishop) because of the threat of 20. Nc4. That was just the final error that allowed the a4 tactical shot. And lo and behold, the d6 pawn is finally muscled away from black on move 25, the climax of white's combination. The rest of it is certainly not easy but white is a solid passed pawn up.
Apr-15-14
Premium Chessgames Member
  sakredkow: Initially I'm surprised that 13..Bxf3 didn't happen and that Black in fact passed on several subsequent opportunities to disrupt White's kingside. Keep in mind I'm not a strong player.

I see that White could then use the half-open g-file as part of an attack on Black's king. I can also see that White's pieces look pretty active, so maybe that would weigh against the exchange.

What are the other considerations for the possible Bxf3 exchange? I would have been very afraid as White to leave my kingside busted open that way. How do you evaluate the position after 13...Bxf3. Not is it plus or minus but what are the major elements that help White (or Black) decide on positions like that?

TIA.

Nov-30-14  kstokelyk: Good question, <sakredkow>. I think a lot of online blitz players definitely would have gone 13...Bxf3.

It could be the fear of two bishops in a game that could open up more later. Or perhaps the desire to get a white knight on e4. Or perhaps the particular desire to get white's good bishop off the board, a task rendered unlikely by the BxN trade.

There are a lot of games in the database where black doesn't take that knight, so there must be some theoretical justification for it...anyone got one?

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