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Heinz Baumgartner vs Viktor Korchnoi
2nd ECC round of 32 (1978), Biel SUI, May-??
Zukertort Opening: Sicilian Invitation (A04)  ·  0-1



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Kibitzer's Corner
Jan-24-11  luzhin: After 17...b5! White's position falls apart with amazing speed. A key point is that if 23.Qd2 then Rxc1+ 24.Qxc1 Nd3+.
Premium Chessgames Member
  perfidious: The position with Korchnoi to move before 17....b5 would make an interesting POTD, not to mention prior to 21....Rbxb5.

White had to acquiesce in the retreat of the bishop at move 21, unpleasant though his position would then be.

Premium Chessgames Member
  al wazir: 23. Qe3, defending the ♗, had to be better than the move white played.
Apr-04-19  Boomie: I would have played 17. Nxf6+ exf6 18. O-O. It probably loses too, but it will take a lot longer.
Premium Chessgames Member
  FSR: 21...Rbxb5! 22.Rxb5 (22.cxb5 Rxc1+) Rxc4 23.Qd1 Rxc1 24.Qxc1 Nd3+ wins.
Premium Chessgames Member
  agb2002: Black has two knights for the bishop pair and a pawn.

The white king remains uncastled and the bishop on c1 is defenseless. These details suggest Nxd5 and Rbxb5. In the case of 21... Rbxb5 22.Rxb5 (22.cxb5 Rxc1+ wins) 22... Rxc4:

A) 23.Qa1(d2,e3) Rxc1+ wins decisive material (24.Qxc1 Nd3+).

B) 23.Qb2 Nd3+ wins.

C) 23.Qd1 Rxc1 as in A.

D) 23.Qa7 Rxc1+ 24.Kd2 Rc7 looks winning. For example, 25.Rb8 Rxa7 26.Rxd8+ Kg7, followed by Rxa2 or Nxd5, wins decisive material.

Apr-04-19  Walter Glattke: Black also wins with 23.-Rxa1 24.Rb8 Qxb8 25.Qxb8+ Kg7 26.h3 Rh2 27.a4 Nxc4 giving a knight for a-pawn and playing -h5.
Apr-04-19  Cybe: 21. Bc6 instead of 21. c4? seems to be the best continuation for White.
Apr-04-19  saturn2: Got 21..Nxd5 and 21..Rxb5

<al wazir> 23. Qe3 Rxc1+ 24. Qxc1 Nd3+

Apr-04-19  malt: Have 21...Rb:b5 22.R:b5 R:c4
Where to place the Queen ?, as

23.Qe3 R:c1+ 24.Q:c1 Nd3+

Apr-04-19  Dazazz: al wazir: 23. Qe3, defending the ♗, had to be better than the move white played.

If 23. Qe3 then 23. ... Rxc1 24. Qxc1, Nd3+

Premium Chessgames Member
  wood n tempo: Very nice. I got 21...Rbxb5 22.Rxb5 Rxc4, but failed to see the nice retort 23.Qa7.
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  perfidious: <wood n tempo>, it is the possibility of that very retort which elevates this to a midweek POTD, and which would relegate it to a Tuesday puzzle if the black king were on g7.
Premium Chessgames Member

click for larger view

Analysis by Houdini 4 <d 24 dpa done

1. = (-0.01): 16.Rb2> Bxd5 17.cxd5 Ne5 18.Qd4 b5 19.0-0 Qa5 20.Rc2 Nc4 21.Bg5 Na3 22.Rcc1 Qb6 23.Be3 Qxd4 24.Bxd4 Rc7 25.g4 Rbc8 26.Kg2 Nd7 27.f4 Nf6 28.Kf3 Nc4 29.Bxc4 Rxc4 30.g5 Nd7

2. = / + (-0.35): 16.Rb1 Ne5 17.0-0 Nxc4 18.Bxc4 Rxc4 19.Nxf6+ exf6 20.Rd1 Rc6 21.a4 b5 22.axb5 axb5 23.Qd4 Rc4 24.Qe3 Rbc8 25.Bd2 R4c5 26.Qd4 R8c6 27.Bf4 Rc4 28.Qd2 Rxc3 29.Rxb5 Bb3 30.Ra1 Rc2 31.Qd4 Bc4 32.Rb7

Apr-04-19  ChessHigherCat: Black's Rc7 maneuver to counter the threat of Rb8 pinning the queen is pretty slick, but unless I'm missing something black can simply give the Q for two rooks and still have a big advantage:

24...Rxh1 25. Rb8 Qxb8 26. Qxb8+ Kg7

leads to this position (-4.96):

click for larger view

Apr-04-19  saturn2: <ChessHigherCat...can simply give the Q for two rooks and still have a big advantage:> Just wanted to write the same. 23 Qc7 is not the super trick.

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