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Wolfgang Unzicker vs Vladimir Antoshin
Chigorin Memorial (1965), Sochi URS, rd 5, Sep-??
Spanish Game: Closed Variations. Breyer Defense (C95)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Sep-17-05  pawntificator: Perkins, he needs to check from the center so he can bring the dark squared bishop into the fight. If he plays Qh5, then instead of g6 black plays 26...Kf8 and he can hold off the threats...for instance, 27 Qxh7 Qc6 28 Qh8+ Kf7 29 Qh5+ Kg8 and black could win. Incidentally, I also thought the solution involved checking on h5 until I saw the solution. Then I saw the infallible logic of it. However, contrary to patzer's comments, I feel that after 27...Be7 28 Rxe7 Rxe7 29 Qe6 that black can hang on only the exchange down with 29...Qd8 and try to get his passed pawns across.
Sep-17-05  NBZ: I think Antoshin could have played on a little longer. After Rxf5 Rxc4 White is obviously much better but Black is not dead yet. The win is still some way off for White.
Sep-17-05  NBZ: pawntificator after 29. ... Qd8 30. Bxe7+ Qxe7 31. Qxc8+ wins
Sep-17-05  Catfriend: As I looked at the position, it was somehow (maybe because it was a chessgames.com puzzle:) ) obvious that the attack must break black's pawn defences. So, the first move found, it's a matter of checking several lines before noticing the double-diagonal attack by the queen and Bd6.

Next, I assumed the worst: no mate is going to be achieved. So, let's see what happens in a case of massive exchange - the rook is going to take Qb6. What after that? Oh, Nb2 is falling. At that stage, I knew I solved it:)

Sep-17-05
Premium Chessgames Member
  OhioChessFan: Found it, which is rare on Saturdays. Sure helped a lot to know it was a puzzle position and a decisive tactic was ready to be played.
Sep-17-05  Averageguy: I got everything to 27...Re7 but couldn't visualize any furthur, and decided to check up the solution.
Sep-17-05
Premium Chessgames Member
  al wazir: <NBZ: I think Antoshin could have played on a little longer. After Rxf5 Rxc4 White is obviously much better but Black is not dead yet. The win is still some way off for White.> You're singing from my hymnal.

My solution started the same way Unzicker did, then continued 28. Rxe7 Bxe7 29. Bxe7+ Kxe7 30. Re1+ Kf8 (30...Kf6 31. Re6+ wins the queen) 31. Qd7. Now if 31...Qb7 or Qc6, 32. Re8+ wins the queen. If 31...Qb8, then 32. Re7 with mate or the win of the queen to follow.

So white ends up with Q against R + N. Is that a win? Well, it is if Antoshin is the kind of player who resigns when he's an exchange down.

Sep-17-05  yossimimon: Hey guys, why do you think black didn't play Nxe4 at move #12?

He should have been up by a pawn then.

What may have been white response afterwards (if so)?

Thanks.

Sep-17-05  woodcreeker: 12...Nxe4? hangs a piece to 13. Nf5!, so 12...Nb6 threatened 13...Nxe4, hence 13. Bc2
Sep-17-05
Premium Chessgames Member
  jahhaj: <pawnficator, NBZ> After 27...♗e7 28.♖xe7 ♖xe7 29.♕e6 ♕d8 stronger than 30.♗xe7+ is 30.♖e1 with a big win of material, e.g. 30...♖c7 31.f6! gxf6 32.♕xf6+.
Sep-17-05
Premium Chessgames Member
  jahhaj: <al wazir> My analysis followed yours but unfortunately Black has stronger options on move 31, 31...♕d8 or 31...♖d8 are both winning for Black.
Sep-17-05
Premium Chessgames Member
  jahhaj: Didn't get this one, saw the main ideas but overlooked the strength of 27...♗e7 28.♖xe7 ♖xe7 29.♕e6. Instead I went down various inferior alternatives looking for a White win.

One I definitely would not have seen OTB, I don't have the vision to see the best moves from a position that is four or five moves on from the position on the board.

Sep-17-05  Koster: Bf7ch is obvious, and so are most of the other moves, but i missed Qe6 in the Be7 line, with threats to both queen and rook, and couldn't find a win. OTB i would have spent more time, but still likely have missed that.
Sep-17-05  NotABanker: Patzer2 - I like your Demolition of Pawn Structure game collection. Good job!
Sep-17-05  ckr: Only saw this much
25.Bxf7+ Kxf7 26.Qd5+ Kf8 27.Bd6+ and also look at starting with a rook exchange before the bishop sac. I also felt black would play 28....Be7 and could not see very clearly after that. Stuff that far ahead I need to use my opponnets time to keep ahead after some of the moves are played, possibly why I looked at the rook xchange first.
Sep-17-05  grook: Nice and delightful when u get to see the whole combo! Antoshin humbled....
Sep-17-05  fgh: Ok, I got it :-)
Sep-17-05
Premium Chessgames Member
  al wazir: <jahhaj: My analysis followed yours but unfortunately Black has stronger options on move 31, 31...Qd8 or 31...Rd8 are both winning for Black.>

Right. Unzicker war sicher.

Sep-17-05
Premium Chessgames Member
  kevin86: The pieces went off so fast,I thought someone used a vacuum cleaner on the chessboard. White's clever combination gains him the exchange.Antoshin must have felt being kicked in the shin (lol)
Sep-17-05  lopium: I got the two first moves.
Sep-17-05  PhantomKnight: This is my first post here. I didn't see the game continuation, but I did see the variations showed by patzer2.
Sep-17-05  ThomYorke: What about 26.♕h5+ ? It seems to be winning too
Sep-17-05
Premium Chessgames Member
  jahhaj: <ThomYorke> There's no win after 26.♕h5+, pawnficator has already answered this, see above.
Sep-17-05  EmperorAtahualpa: <al wazir: Unzicker war sicher.> LOL! Good one.

Anyway, nice puzzle....I got the first moves just by relying on instinct rather than pure logic, the rest was way beyond me. :)

Sep-17-05  dac1990: I would offer Fritz's services, but patzer2 seems to have it covered (with the post on page 1). Sweet combination.
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