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David Bronstein vs Zarkov (Computer)
Aegon (1992), Den Haag, rd 5
King's Indian Defense: Normal Variation. Rare Defenses (E90)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Oct-15-05  snowie1: Nope, mistit. I found 39.h6..Ne8 40.Bf5..gxf5 41.Nxf5..Qd8 (e8?) 42.Ng7..Nxg7 43.hxg7..Bxg7 44.Qxh7.... but the question becomes...will black take the N? allowing the h-pawn to move into g? If so, I won another way.
Oct-15-05
Premium Chessgames Member
  chessgames.com: GannonKnight, true, 9 out of 10 players would probably play hxg6 there anyhow, but not many would play Qxh7+!! You should read Daily Puzzle F.A.Q. "The goal is to find the best move, or sequence of moves, in the given position." On days like this, it's the sequence of moves (hxg6, Qxh7+, etc.) which is the solution, not merely the initial move.
Oct-15-05  Goumindong: Why doesnt Bronstien play 28. hxg6.

Or possibly earlier. To me, i cant see black getting out of this position. Unless black checks(which black cannot do). He is mated with any progresion involving taking the pawn, moving the knight to f6(28..Nf6 29.gxh7..nxh7 30. Qxh7++ or 28..Nf6 29.gxh7..kg7 30. Qh6++) or advancing the h pawn (28..h6 29. Qxh6..Nf6 30.gxf6...anything 31. Qh7++)

What am i missing?

Oct-15-05  Goumindong: nevermind f6
Oct-15-05  likestofork: To fans of The Sopranos: When Johnny Sack promises Tony S that he "will rain a s***-storm down on you and your family like you have never f***in' seen" if Tony doesn't hand over his cousin, move 39 and afterwards of this game provide a fairly accurate rendering of what the proverbial 's-storm' would look like.
Oct-15-05  Saruman: I saw up to move 44, and I think I would have found the rest OTB. I don't understand how this can be a difficult puzzle Qxh7+ is so obvious! After 40.-Kf7 I could not find a conclusive series of moves, however white is clearly better.
Oct-15-05
Premium Chessgames Member
  OhioChessFan: <Saruman>, Qxh7 wasn't obvious to me. The first move is a no brainer. However, I tried to clear the h file by moving the Bishop to f5 or e6. Nxf5 or e6 allows the Black Queen to protect h6 is the fly in the ointment on any Bishop move.
Oct-15-05  Averageguy: I got everything up yo 41.Nh5. Then I looked at 42.Rxh5+ gxh5 43.Rxh5+ Kg7 44.Nf5+ Kg6 45.Rh6#or 43...Kg6 44.Rh6+ Kg7 45.Nf5#, in both variations missing that the black rook covers f5.
Oct-15-05  Averageguy: <After 48...Rxg8 49. Rxg7+ Rxg7, white is up a rook, knight and two pawns. But why didn't Bronstein play 46. Rxe7+ Kd8 47. Bxg8 ? The bishop at h8 is doomed, so that way white would be up a rook, bishop, knight and two pawns.>Lol, sometimes you get a positoin where so many of your opponents pieces are hanging you don't know in what order to take them! I think in the end that white emerges up a rook and a knight after 48...Rxg8 49.Rxg8 Qxh7 50.Nf8+, like notsodeepthought said.
Oct-15-05  erikcu: Since I have no worthy comments about this demolition finish, I will post this off of Roger Ebert's website (movie reviewer). Some reason today's puzzle seemed to be the antithesis of this idea, and made me think of it.

Checkmate Reflex
To quickly establish the hero (or villain) as a true (but erratic) genius, he will play a game of chess early the movie, and quickly trash his opponent with a surprise mate-in-one. See Jeff Goldblum in "Independence Day." IVAR LABERG, Oslo, Norway

Oct-15-05  snowie1: h6 wins in any case. Black is squeezed off the map at this point. Ne8 and neither of the Ns can enter the game again. Now it's a matter of what sac is most effective to break up that quadrant of the board {cartesian remark.) lol.
Oct-15-05  DutchDunce: Yay, I finally got one of the puzzles! I just figure the answer is always 'sac the Queen'. And sometimes it's right.
Oct-15-05
Premium Chessgames Member
  kevin86: A strange finish;white sacs his queen,and though black's queen was there for the taking,white turns it down... then he traps the queen again!
Oct-15-05  BipolarChessorder: I saw 40. Qxh7+! but then I figured black had best decline the Queen with 40...Kf7. What next for white? perhaps 41. Qxg6+!? Kxg6 (forced, otherwise 42. Be6+ and 43. Rxh8 mate) and then what? 42. Bf5+ Nxf5 43. ef+ Rxf5 44. Nxf5 Kxf5 and I can't see any forced win. Anybody?
Oct-15-05  Hemmeireoid5: This game is so instructional! There are a number of strategic themes throughout. I will try to post them here in an attempt to help myself understand the whole thing when I come back to reviewing the game at a later date. Please can someone correct me if I havent understood/left out something. Thanks.
Oct-15-05  Chess Addict: The computer thrashes for a couple of moves before it resigned.
Oct-15-05  Hemmeireoid5: 5 h3. Stops the black knight/bishop from jumping in at g4 and prepares g4 for a later date. Not always a good idea in an opening what with moving your pawns in front of the king etc. But Bronstein hasn't castled yet and has other plans for his king.

7. D5 closes the centre. As someone said above computers are/were notorious for being bad in closed positions shuffling their pieces back and forth with no concrete plan (what eventually happens in the game) hems in Blacks Bishop on g7 for the remainder of the game.

10 Bb1. keeps the all important white Bishop. It will be needed in the end. Although it appears that Bronstein has hemmed in his own Rook on a1 he will be able to play a3 shortly (unavoidable) and return his bishop to its rightful place on d3 without losing a tempo. On d3 it may look like a Bad bishop trapped behind its own pawns but from there it will be able to switch the play later with deadly effect (all part of his plan).

14. Nd2! The centre was closed on move 7 so Bronstein has time to regroup his knight and Bishop. Although it costs 5 moves it is ok because the computer will not be able to open up the position. As the computer will not be able to open the posiiton then I shall take the time to improve mine. I want my knight on g3 to support a possible pawn push on h5. If at all possible my rooks should be on g1 and h1 to help with the push. But for now I shall readjust my knight in keeping with the needs of the position and my plan.

Oct-15-05  Hemmeireoid5: 19. Kd2 well not going to castle the position is closed. in the middle my king is ok and I need to join my rooks.

20. f3. Lets protect g4 as I might be thinking of playing h4 still got plenty of time to do so and my queen might want to come to g2 or h2 to help with my kingside pawn push

34. Bishop to f1!! swith the play,. My Bishop wasnt doing anything on the blocked b1-h7 diagonal so ive found a better diagonal. In keeping with my plan as far back as move 10. The d6 square looks very appetising for my Bishop and maybe/certainly there is a discovered check threat if I open the h file.

35 Nc3. Just keep everything closed on the queenside. Not ready to give up any counterplay nor to open the position just yet.

Oct-15-05  Hemmeireoid5: 38. Rbh1. There it is folks. I've seen the sacrifice and I'm ready to open the position. Bringing my last available piece into the attack before i I do.

So there is my tuppence. Why Bronstein didnt play 48. Rxe7+ I will never know. Sur the computer doddererd about a little on a couple of moves but for Me Bronstein had a clear plan throughout the entire game and he followed it through till the end. Does anyone know if I can find this gamed annotated by someone who knows??

Thanks for reading. All comments welcome.

Oct-15-05  Lion83: Got this one up till move 46 where I would have played Rxd7+ instead of Bronsteins Bxg8.

Does anyone know what happens if Black declines the Queen sac. One line I looked at was 41 Bf5 gxf 42 Nxf5 Qd8 (Qd7 43 Nxg7 Bxg7 44 Qxg7+ Kxg7 45 Rg7+ etc) 43 g6+ and 44 Nxg7 not sure if I got that one right though haven't checked it with computer yet. Anyway that seems better than accepting when Black was just killed.

Oct-16-05
Premium Chessgames Member
  Richard Taylor: I saw the initial moves - I had (as played) 39. h:g6 f:g6 40. Qh7+!! K:h7 41.Be6 Nh5 42.R:h5+ g:h5 43. N:h5 g:h5 44, Rh5+ winning I didn't look at 42...Rg8 but 43. Nf6+ seems tome to win quicker 43... Kg7 44 Rh7+ Kf8 45. R:h8

then if 1) Ne6 46. R:g8+ Kf7 47. Rh7+ Ng7 Rh:g7#

or 2) Q:e6 46. R:g8+ Ke7 47. Rh7+ and mates

or 3) Q:f6 46. g:f6 N:e6 47. d:e6 g5 48. B:g5 and mate by 48. Bh6 or R:g8 cant be stoppped

or 4) RxR 46. R:h8+ Kg7 47. Rh7+ Kf8 48. Nd7+ an White wins easily

or 5) Qg7 46. B:g8

I must concede I didnt calculate all this!! But I did think - what happens if after the Q sac 40 Q:h7 Black plays Kf7 then I thought Bronstein might have considered:

41. Qg6+!!?? which won as far as I could see without moving pscs around on a board -

I saw - K:g6 42. Nf5 N:f5 43. B:f5+ R:f5 44. Rh6+! Kf7 45. e:f5 when I thought White was going to win but White can (also) sac the Queen twice -it just looked interesting.

I could see this far (and a few ideas of forcing a Q) -I see now eg 45...Rg8 46. g6+ but 45...Bg7 and there are all sorts of interesting variations in fact the second Q sac is very interesting as after Kxg6 42. Nf5 Qd8 43 Bf4 or 42. ...R:f5 43. Bf5+ Kf7 44. g6+ Kf6 45. Rh5 N:h5 46 R:h5 Re8 47. Bg5+ with interesting complexities

Oct-16-05
Premium Chessgames Member
  Richard Taylor: < BipolarChessorder: I saw 40. Qxh7+! but then I figured black had best decline the Queen with 40...Kf7. What next for white? perhaps 41. Qxg6+!? Kxg6 (forced, otherwise 42. Be6+ and 43. Rxh8 mate) and then what? 42. Bf5+ Nxf5 43. ef+ Rxf5 44. Nxf5 Kxf5 and I can't see any forced win. Anybody > I also - I just saw comment by you on this - see my analysis above - I think it is an interesting sac -and may win.
Oct-16-05  Caissanist: <Richard Taylor><Bipolar Chessorder>: after 40.Qxh7+ Kf7 it looks to me like white can win with 41.Nf5. After 41...gxf5 42. exf5 Ke8 43 f6 wins at least a piece. 41...Qd8 42.Nxg7 also wins decisive material.
Oct-16-05
Premium Chessgames Member
  Richard Taylor: < Caissanist: <Richard Taylor><Bipolar Chessorder>: after 40.Qxh7+ Kf7 it looks to me like white can win with 41.Nf5. After 41...gxf5 42. exf5 Ke8 43 f6 wins at least a piece. 41...Qd8 42.Nxg7 also wins decisive material. > I could see Nf5 was winning but I was fascinated by the second Q sac -but thanks.
Nov-13-09  WhiteRook48: Qxh7+ would immediately be obvious to attacking players
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