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Gennadi Sosonko vs Anatoly Karpov
Waddinxveen (1979), Waddinxveen NED, rd 1, Jun-12
Catalan Opening: Closed Variation (E06)  ·  0-1


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Kibitzer's Corner
Jul-31-07  PivotalAnorak: 28...♗c8 !
Mar-25-08  Kwesi: 28 Bc8 - transcendent move.
Premium Chessgames Member
  whiteshark: Grandmaster Ronen Har-Zvi presented this game in a lecture: starts at around 29m00s

Position after <28.Nxc1>:

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Premium Chessgames Member
  Fusilli: Trying to see the winning method from the final position.


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44...f4+! 45.Kxf4 Bd2:

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Black threatens 46...Kc5 winning the knight, so:

46.Be4 (only move) Bf1:

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Now Black again threatens Kc5 winning. White needs to clear the e4 square for the king. The bishop cannot allow the black king to go to d5 (winning), so White can only move the bishop down the long diagonal:

47.Bb7 Bxh3 48.Ke4:

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And now, I believe 48...Bxe3 49.Kxe3 Bf5 wins, right? If 50.Be4 Bxe4 and Black wins the pawn ending. And if White commits his king to sustain the a2 pawn, then Black will win on the kingside, I think. (I am not looking at specific lines.)

Did I get it right? Did I miss anything simpler?

May-20-17  Saniyat24: A very attacking Karpov....must be one of his best games...Sosonko did not play badly at all, but Karpov's two bishops were too dangerous...!
May-21-19  Inocencio: Move #28 (Bc8) by Karpov was the key to his victory. He avoided the exchange in order to maintain his advantage of having two (2) bishops. In the ensuing endgame, move #28 proves to be fatal.
Premium Chessgames Member
  keypusher: <Fusilli> Unfortunately in your line after 44.Ne3 f4+ 45.Kxf4 Bd2 46.Be4 Bf1 Sonoko has 47.Bf5! clearing e4 for the king and protecting the pawn on h3.

Instead after 44.Ne3 either ...Bd4 or ...Kc5 seem to win pretty easily. For example, 44.Ne3 Bd4 45.Nc4 Bxc4 46.bxc4 a4! followed by ...b3 and either ...axb3 or a3 and Black gets a queen.

After 44....Kc5 your idea is definitely "on" after something like 45.Bc8: 45....f4+! 46.Kxf4 Bd2 wins the knight. If White plays 45.f4 to prevent this, then 45....Bb1 46.Bf3 Be1+ 47.Kg2 Kd4! 48.Nd5 Bxa2, etc.

This analysis is almost all SF10; I thought your idea was great.

Premium Chessgames Member
  Fusilli: <keypusher> Good catch, thanks. Reading my original post, I wrote < The bishop cannot allow the black king to go to d5 (winning)> but ...Kd5 would be an illegal move with the white knight on e3, so Bf5 is fine as you pointed out.
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