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Jan Plachetka vs Lothar Zinn
Decin (1974)
Zukertort Opening: Sicilian Invitation (A04)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Given 73 times; par: 15 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 4 ·  Later Kibitzing>
Oct-18-12
Premium Chessgames Member
  FSR: I went to Raymond Keene's book Nimzowitsch/Larsen Attack for edification, and found this on page 27:

<Plachetka-Zinn, Decin 1974, continued [gives moves of game without comment] 12.Qh5!! 1-0>

That was enlightening.

Oct-18-12
Premium Chessgames Member
  FSR: Plachetka analyzes the game in Chess Informant 18/3. He gives:

<12.Qh5!! [12...gxh5 13.Rg3+ Kh8 14.Nf7#; 12...Nf6▢ 13.Ng4! (13.Qh6 d4! 14.Ng4 Nh5 15.Rxh5 f5! unclear) gxh5 14.Nxf6+ Kh8! (14...Kg7 15.Ne8+! Kh6 16.Bg7+ Kg6 17.Rg3+ Kf5 18.Rg5+ Ke4 19.Nc3#) 15.Rxh5 h6 16.Nxd5+ ] [check and capture signs added by me]>

Oct-18-12
Premium Chessgames Member
  whiteshark: <vukotic> That's nonsense. <11...Nxe5 12. fxe5 Be7> doesn't lose a piece.
Oct-18-12
Premium Chessgames Member
  whiteshark: <11...f6! > was a perfectly playable move.


click for larger view

White has nothing in that case.

Oct-18-12  Abdel Irada: <whiteshark>: Agreed. It is far more positionally consistent to play 11. ...f6, when White's rook lift begins to look na´ve and the bishop on b2 bites granite. White may be able to angle for positional pressure against the doubled c-pawns, as in some variations of the Benoni with colors reversed, but it seems unlikely because, whether he exchanges or retreats the knight, Black will play ...e5 and will soon gain a useful tempo against the rook, as for example after an exchange on e5 in which he recaptures with the knight.

Meanwhile, the sacrifice 12. Qh5 leads to nothing for White but a lost game after the simple 12. ...fxe5. If White recaptures on e5, Black recaptures with his bishop, and will soon play ...Nf6 to evict the queen.

There is really nothing wrong with Black's opening until he creates that fatal weakness on the long diagonal by playing 11. ...g6?

Oct-18-12
Premium Chessgames Member
  FSR: But take Plachetka's line 12...Nf6 13.Ng4! gxh5 14.Nxf6+ Kh8! 15.Rxh5 h6 16.Nxd5+. I was not happy with this line because of the mess created with 16...Be5!


click for larger view

Then 17.Rxe5?? cxd5 is 0-1. 17.Bxe5+ Qxe5 18.Rxe5 cxd5 should <eventually> win for White, who is two pawns up. But this will still take a long time, since White will have a hard time creating a passed pawn anywhere. I guess White should win after 17.Nxc7! Bxb2 18.Nxa8 Bxa1 19.c3 Kg7 20.Nc7 Rc8 21.Nxe6+ fxe6 22.Rxc5.


click for larger view

But I certainly wouldn't have resigned after White's 12th move.

Oct-18-12
Premium Chessgames Member
  FSR: <Abdel Irada: <whiteshark>: Agreed. It is far more positionally consistent to play 11. ...f6 . . . Meanwhile, the sacrifice 12. Qh5 leads to nothing for White but a lost game after the simple 12. ...fxe5.>

You really think 13.Qxh7+ Kf7 14.Qh5+ is a simple win for Black? I dissent. Obviously 14...Kg8 15.Qh7+ allows White to repeat if he so desires, and neither 14...g6 15.Qh7+ nor 14...Ke7 15.Qg5+ looks pleasant for Black.

Oct-18-12  Abdel Irada: <FSR>: I suspect psychology played a big part.

Black had played 11. ...g6? precisely to prevent 12. Qh5, and then White played it anyway, so he must have already been thrown back on his heels.

Then he probably performed the simple calculation that he lost after 12. ...gxh5, looked at the knight on e5 and the long diagonal pointing at his king, and simply threw up his hands (without even taking time to ask himself why he ate them in the first place) and resigned.

Oct-18-12  James D Flynn: Material is equal but Whites are pointing at the Black K-side whereas Blackare cut off by his own pawns. Given a chance Black can reduce that menace by exchanging on e5 Blocking the black square bishops diagonal : it is time to strike. 12.Qh5 gxh5(if Nf6 13.Ng4 Nxh5(if gxh5 14.Nxf6+ Kg7 15. Ne8+ Kg6(if Kh6 16.Bg7+ Kg6 17.Rg3+ Kf5 18.Rg5+ Ke4 19.Nc3#)16.Rg3+ Kh5 17.Ng7+ Ke4 d3#) 13.Nh6#
Oct-18-12
Premium Chessgames Member
  FSR: <Abdel Irada> Probably so. That sort of thing is why one should resist the temptation to immediately resign upon being hit with a nasty surprise. Things are not always as bad as they seem at first glance. Sometimes they really are that bad, but one gains nothing by rushing to resign.
Oct-18-12  kasputine: <FSR>
after 16 ... Be5, white plays
17 Bxe5 Qxe5
18 fxe5 cxd5
19 Rxh6 and with 3 pawns up, white should win easily.
Oct-18-12
Premium Chessgames Member
  Eggman: I got this instantly, of course ... because I've seen it before!

This game has been used as a puzzle / example in many books, and I believe yet other puzzles have been derived from it. I've seen it in 'The Complete Chess Workout' by Palliser, '1000 Checkmate Combinations' by Henkin (an all-time classic, BTW), and possibly some other tactical training books as well. Also, the game S. M. Gonzalez vs M. Fernandez Juan, Valencia 1995, features the same position but with colours reversed (and the defending side has the QRP on the third rank rather than the second), but that game doesn't seem to be in our database.

Oct-18-12
Premium Chessgames Member
  Eggman: By the way, FSR, in your line above after 12...Nf6 13.Ng4 gxh5 14.Nxf6+ Kh8 15.Rxh5 h6 16.Nxd5+ Be5


click for larger view

17.Bxe5+ Qxe5 how about 18.fxe5 (instead of 18.Rxe5) cxd5 19.Rxh6+ Kg7 20.Rh3, and then White is three pawns up instead of two?!

Oct-18-12  Razgriz: I did not get it at all. I feel dumb.
Oct-18-12  David2009: Plachetka vs L Zinn, 1974 White 12?

There is a spectacular King hunt starting 12.Qh5! Main vaiation: 12...Nf6 (if gxh5 13.Rg3#) 13.Ng4 gxh5 (if Nxg4 Qxh7#; if Nxh5 Nh6#) 14.Nxf6+ Kg2 15.Ne8+ Kg3 16.Rg3+ Kf5 (if Kh6 Bg7#) 17.Rg5+ (or 17.Ng7+) Ke4 18.Nc3#. Time to check:
====
Very respectful resignation! Puzzle position:


click for larger view

Come back Crafty EGT all is forgiven! Playing my line out as a variation on the Chessgames board is much less satisfying than the excitement of discovering if I have blundered (or not), etc.

Link (just in case the EGT ever comes back on air): http://www.chessvideos.tv/endgame-t.... Meanwhile - I need to read the kibitzes and find a computer analysis.

Oct-18-12  David2009: Plachetka vs L Zinn, 1974 postscript: Here's an analysis by Fritz 12 of the position at move 12:


click for larger view

1. (3.42): 12.Qh5 Nf6 13.Ng4 gxh5 14.Nxf6+ Kh8 15.Rxh5 h6 16.Nxd5+ Kh7 17.Nxc7 Bxc7 18.Rxc5 Bd7 19.Nc3 Kg6 20.Ne4 f5 21.Ng3

2. = (-0.03): 12.Nxd7 Qxd7 13.Bf6 Re8 14.Qg4 Be7 15.Bxe7 Qxe7 16.Qh4 Qxh4 17.Rxh4 e5 18.Nc3 Bf5 19.Na4 c4 20.bxc4 Bxc2 21.Nc3 d4

Trust this addresses <gofer>'s question. It is depressing how rapidly and accurately Fritz 12 analyses.

Oct-18-12
Premium Chessgames Member
  agb2002: I have found this position in several references. The last time on page 187 of Pachman's "Practica de las aperturas en el ajedrez". Looking forward tomorrow.
Oct-18-12  jancotianno: :( i certainly feel dumb today neglected 12. Qh5 due to 12... Nf6 because i completely forgot about the bishop on b2 thus allowing a fantastic move 13. Ng4! its amazing how often pieces can simply be forgotten about.
Oct-18-12
Premium Chessgames Member
  Eggman: <<i completely forgot about the bishop on b2 thus allowing a fantastic move 13. Ng4! its amazing how often pieces can simply be forgotten about.>>

When I tackle complicated puzzles I first memorize the position and then set it up on a board from memory. I think this is a good practice because you get in the habit of noting all the features of the position, including all the pieces that are ready to participate in an attack / combination.

Oct-18-12
Premium Chessgames Member
  keypusher: Partial credit, I guess, because I saw 12.Qh5 immediately, then realized that 12....Nf6 was the best defense, then after a little more cogitation saw 13.Ng4. But I didn't see FSR's 13....gxh5 14.Nxf6+ Kh8 15.Rxh5 h6 16.Nxd5+ Be5(!). Nor did I see the full mating line after 14....Kg7 15.Ne8+ Kg6 16.Rg3+ Kf5 17.Rg5+ Ke4 18.Nc3#.

<David2009>

<1. (3.42): 12.Qh5 Nf6 13.Ng4 gxh5 14.Nxf6+ Kh8 15.Rxh5 h6 16.Nxd5+ Kh7 17.Nxc7 Bxc7 18.Rxc5 Bd7 19.Nc3 Kg6 20.Ne4 f5 21.Ng3>

What does the engine say after 16....Be5?

Oct-18-12  Rama: Missing 12. Qh5! I saw that 12. Ng4 also threatened immediate mate which qualified it as a good move to me.

The response 12. ... e5, leads to some very cute tactics and is fun to play out. It may even be winning even though inferior.

Oct-18-12
Premium Chessgames Member
  al wazir: <Abdel Irada>: Sorry. I stopped reading after the first post that mentioned 13. Ng4 (Honza's) and missed yours, which analyzes the position exhaustively. (But maybe it wasn't there when I started typing.)
Oct-18-12
Premium Chessgames Member
  chrisowen: I had an inkling for knightg4 and decided this blocked off queens

route so ha deviate a ok 12.qh5 and threats are unstoppable bishop

knight rook queen all combine too thwart black g6 sealed his fate

having opened long diagonal allows h5.

Oct-18-12
Premium Chessgames Member
  chrisowen: Examining this further we see black has know defence to g4 after nf6

protecting h7 sample lines could go

<12.qh5 gxh5 13.rg3+ kh8 14.nxf7#>

<12.qh5 nf6 13.ng4 gxh5 14.nxf6+>

Suffer the indignity of taking ones queen curious my instincts tell

me (even e5 to block) long bishop range black drops a piece in f6 ever he in looses it right Bxh3 at white in regains the queen drops back to collect h3 or gxh3 piece up.

13...e5 14.nxf6+ again et tu brute am in lodged bone nf6 ...kg7

15.qg5 bxh3 16.fxe5 be7


click for larger view

A moral to the story again open lines plus the queen initiative won

through in exposing king to tactics in steady build up g6 a dote all

fluid in together h5 ave to be elongate

14...Kh8 15.Rxh5 h6 16.Nxd5+ you guard enter doubled check winning

the queen plus three pawns 16...kh7 17.nxc7 bxc7 18.rxc5

Oct-18-12  therevolver17: 12.Qh5 gxh5 13.Rg3+ Kh8 14.Nxf7#
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