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Borislav Ivkov vs Viktor Korchnoi
Chess Olympiad Final-A (1968), Lugano SUI, rd 8, Nov-01
Queen's Indian Defense: Classical. Traditional Variation Main Line (E19)  ·  0-1
ANALYSIS [x]

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Kibitzer's Corner
Feb-01-12  optimal play: Korchnoi's clever 27...f5 leads to 29...Ne4! winning the exchange, and after 36...Kh7 there's nothing White can do to prevent further loss of material. Ivkov presumably decided 28.exf5 was the least-worst option, however I wonder if he considered 28.Bxf5!? followed by 28...gxf5 29.Nxf5


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then if say 29...Qf6 maybe 30.Rxd6 gives White a better game? Or at least some interesting attacking possibilities?

Feb-01-12  ughaibu: Instead of Qf6, how about Qg5 and if white plays Rd6 Rd6 31.Rd6 then Be4 etc?
Feb-01-12  optimal play: Well then I suppose if after 31...Bxe4 probably 32.fxe4 Nxe4 33.Nxh6+ & White is two pawns up, or alternatively 31...Bxe4 32.Rg6+ Qxg6 33.Ne7+ or maybe even if after 29...Qg5 White instead plays 30.h4!? then maybe 30...Qh5 31.g4 Nxe4 with the prospect of interesting play?
Feb-02-12  ughaibu: I reckon I prefer black, in each of those cases.
Nov-03-12
Premium Chessgames Member
  Fusilli:


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21...e5!

Nuanced positional understanding. At first sight, one can see that this move weakens the d6 pawn. However, Korchnoi is accurately focusing on the weak e4-pawn and plans to follow up with ...f5. If, hypothetically, White tried to reposition his knight to d5 Black could easily send his to d4. After killing the d5 knight with the bishop, the Black knight would be way stronger than the White bishop.

Forceful dynamic play by Korchnoi.

May-07-15  A.T PhoneHome: 27...f5 is indeed brilliant. He needed to remove that pawn on e4 in order to play 28...Bxf3 which removes f3 pawn and finally enables 29...Ne4!

36...Kh7 is a nice finishing touch, trapping Knight and now Korchnoi is a whole Rook up!

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