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Laszlo Szabo vs Nikola Padevsky
IBM Amsterdam (1972), Amsterdam NED, rd 2, May-31
English Opening: Anglo-Indian Defense. King's Knight Variation (A15)  ·  1-0
ANALYSIS [x]

FEN COPIED

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sac: 19.Nf6+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Aug-11-06  Longbrow: <18...Be7 was the move to play.> Correct. The threat to Black should have been immediately recognized @ 18. Ne4. Especially, considering Black forced Whites move.
Aug-11-06  Chris1Clark: Can someone smarter than me help with why not at 23.Qf6. mate to follow on h8 nothing else can help black at this point as I see it. If Bg7 then Qxg7#. So please have a look someone. Black can throw the Knight away but that is pointless.
Aug-11-06  Runemaster: <Chris1Clark> I think you mean 24.Qf6 - see above discussion. Black defends with 24...Kh7 25.Qh8+ Kg6. As <Marco> analyses, 26.g4 leads to a win as well. <Chessgames> gives credit above for both solutions.
Aug-11-06  Marvol: <gawain: What if Black refuses the N? 19 ...Kh8 20 Qd3 threatening mate at h7. If now 20...g6 then 21 Ne8 (discovered check) to win the queen.>

But after 20...gxf6 the Q cannot move to g4 as in the main line so what happens then?

Aug-11-06  Marco65: <Chris1Clark> Guessing you mean 24.Qf6 and not 23.Qf6, I can count 7 posts about that variation, just read them.
Aug-11-06  Chris1Clark: Thank you all. Yes not very awake today it is friday.
Aug-11-06  nescio: <WannaBe: The site, listed as Amsterdam IBM, was this (event) sponsored by the computer company in '72?!>

Yes, between 1961 and 1986 IBM Corporation sponsored an annual international tournament in Amsterdam. You can find a list of winners at: http://www.geocities.com/SiliconVal...

Aug-11-06
Premium Chessgames Member
  MichaelJHuman: I got the first move, but I needed computer help to see that all lines for black fail.

For example:
19...Kh8
20. Rd7 (threatening queen) Qb8
21. Qh5 Kd8
22. g2xb7 Kxb7
23. Rxf7 (and mate becomes unavoidable)

Aug-11-06  EmperorAtahualpa: I guess I didn't solve it. I guessed correctly that 19.Nf6 would be the right move, and I also guessed a couple of follow-up moves correctly, but I didn't think that the bishop on g2 would also be involved! Very nice puzzle.
Aug-11-06  Parriotblue: After 25.Qxd7 can Black keep fighting with Nd8?
Aug-11-06  The17thPawn: <Marvol> Look at <patzer 2>'s line if black refuses the sac. I think you'll find its much more definitive.
Aug-11-06  pazmo7: I also get the first move right away actually (it s a surprise).. but stopped calculating at that point.. don't why...
Aug-11-06
Premium Chessgames Member
  MichaelJHuman: If 25. Qxd7 Nd8
then
26. Qg4+Kh7 27. Qf5+ Kg828. Qf6 Kh7 29. Qh8+ Kg6 30. g4 Ne6 31. Qf6+ Kh7 Qxf7+ Bg7 32. Qxb7

And back will lose another piece with white having an overwhelming advanatge.

Aug-11-06  Tariqov: Instead of the above solution i chose to play 24Qg4+ as suggested by <Boomie>, as after kh7 Rd7 Qxd7 Qxd7 the Bishop on b7 AND the f7 pawn is threatend (with mate).Is there a refutation?or is 24.Qg4+ better?

To really solve the puzzle you need to know what would happen if Black refused the knight, e.g 19Nf6+!Kh8 20.Rd7!Qc8 21.Qc2!gxf6 22.Rxf7Bg7 and 23.Bxf6 and white is clearly better,(another line without accepting the Knight is <patzer2>'s line) :)

Aug-11-06  Chess Classics: I guessed 19. Nf6 right, I just didn't calculate it all the way through. Oh well, until tommorrow.

Regards,
CC

Aug-11-06
Premium Chessgames Member
  kevin86: I got this one! The final move of course will be 28 ♕f6 which btw could have been played four moves earlier.
Aug-11-06
Premium Chessgames Member
  YouRang: Like yesterday, I got the main idea of the attack, but didn't find the convincing finish. 19. Nf6+ was kind of obvious: A forcing move that cracks open black's defense and clears the way of white's light-squares bishop.

20. Qg4+ and 21. Be4+ were also pretty obvious. But the follow-up (sac the bishop, bring down the rook, etc.) were ideas I considered, but never got the timing just right. I'll have to call it a non-solve. :-(

Aug-11-06
Premium Chessgames Member
  gawain: Whoops! Thanks <Marvol> 19 ...Kh8 20 Qd3 (leaving the N en prise) was a hallucination which I blame on being awake so late (on local time) that I was actually the first to see the puzzle. I won't do that again!

Of course the right follow-up is 20 Rd7 as pointed out by <Patzer>

Aug-11-06  dr.roho: i got it all the lines in which black takes the knight with his pawn but i didnt know what to do if black didnt take the knight. sttill i am pretty proud of myself for what i have accomplished
Aug-11-06  dakgootje: Got most of the moves, but missed Rd7... but hey, who cares, its an hour past midnight! Then your not expected to see that much in half a minute!?! Maybe i was lucky ;-)
Aug-11-06  LivBlockade: <kevin86: I got this one! The final move of course will be 28 f6 which btw could have been played four moves earlier.> An important point is that 'four moves later' Black is missing his Queen, so f7 is undefended if Black tries ...Kh7, so it really is checkmate.
Aug-11-06  aazqua: I don't get it. Is this supposed to be hard? Aren't all of these moves obvious??
Aug-12-06
Premium Chessgames Member
  MichaelJHuman: I don't think they are HARD. There was just a fair amount of lines to look at (I guess?)
Aug-12-06  Kingdom NL: Look like one of the games where black is "falling" into a sleep..and suddenly wakes up and realises the position is lost.
Oct-02-15  parisattack: Looks like a Leonid Stein power-play game!

Szabo one of the many fine Hungarian GMs with a hypermodern bent. His book of games is a little-known gem.

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