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|Aug-30-07|| ||kevin86: I answered this one rather easily. The first move gives black an offer he could not refuse. The rest of the puzzle is to set up a mate with queen and rook.|
The next move is of course 38 ♕g6#, that's why black resigned so abruptly.
|Aug-30-07|| ||znprdx: znprdx: 34. The assumed Bxg7 Kxg7[B] forced 35.Rf6 threatening Qh6+ >mate Stopped cold by ...Rh5 (on the way to 5 ply) Now 36. Rxe6 is not playable so only Qe4 seems plausible as the fog sets in....
34. Qg3 forces Qe7 but White can’t bring the Rook into play which leaves 35. Qb8+ Kh7 Still looking for clearing skies. |
Hmm back to my initial theme 34. Rf6! Rh5 35. Qg4 g5 36. Rxe6 Qf7 37.Qxc4 [N] ...Oh No Rxh6[B} is playable...what a futille attempt - so much for being creative - sometimes "boring" <? ahmadov:> is best.
By now OTB I’d have lost on time-HELP -Good grief the most obvious Qf6+ never occurred to me – how is that possible? The graceful rook shifting columns is dazzling – (the constant threats of both Qg6 or g7) I thought the knight would have time to come to the rescue.
|Aug-30-07|| ||znprdx: ZUGSZWANG – in the old days before increments after 37...Rxh2+ 38. KxR Qh5+ 39.Rh3 QxR+ 40.g2 or K)xQ Ne3 White might have lost on time worrying over a non-existant knight fork...that kind of garbage was a major reason for my giving up competetive Chess - aside from the fact I am a patzer :)|
|Aug-30-07|| ||zb2cr: Good job of analysis by <dzchiel>, <MostlyAverageJoe>, and <TheaN>. Mostly, I've replicated their collective analysis. |
The entire line took me about 3 minutes to work out.
I found that the sacrifice, if accepted, would lead to 35. Qf6+ and a Rook lift that would put Black in dire straits.
I decided that about the only line that allowed Black to decline was 34. ... Rf5. My analysis of the main line again mostly repeats what was already stated. However, to fill in a blank, if 35. Rxf5, Bxg7; 36. Qf6+, Kh7; 37. Rg5 works. Black can't stop the threatened mate by 37. ... Qh8 because of 38. Qg6# (as in the game), and 37. ... Qd7; 38. Qg6+, Kh8; 39. Qg8# (or, if you want to be cruel, 39. Rh5+, Qh7; 40. Qxh7+).
|Aug-30-07|| ||YouRang: I missed it (3/4 this week).
I got hung up on trying to manufacture an attack with 34. Qg4 Qe7 35. Bxg7! Qxg7 36. Qxe5+ Kh8 37. Qe8+ Kh7 38. Rf7 pinning queen. But it's not forced and other lines are doubtful.
My cursory glance at 34. Bxg7 didn't look promising. I should have looked closer. :-(
|Aug-30-07|| ||apple pi: 37...Qh8 LOL|
|Aug-30-07|| ||patzer2: Who says women can't do heavy construction work? Witness Sofia Polgar's demolition of pawn structure combination, starting with 34. Bxg7!!, as the solution to today's puzzle, as a case in point. |
After the followup moves 35. Qf6+! and 37. Rg3!, Black's exposed King position leaves him hopelessly lost.
|Aug-30-07|| ||fm avari viraf: After the middle game skirmishes, White has a winning advantage & so 34.Bxg7 [knocking down the little defender & exposing the Black King ] 34...Kxg7 35.Qf6+ Kh7 36.Rf3 & Black King is doomed.|
|Aug-30-07|| ||aazqua: Another trivial problem. Rook lifts should be a standard of anyone's arsenal. The fact that black has no forcing moves of her own give white the freedom to take an additional set up move in the sequence. All that construction work talk is a bunch of hoo ha; what was she doing pushing her queen around in the middle game? Lunch break at the site?|
|Aug-30-07|| ||Crowaholic: <not yet a patzer: If black does not move Qh8, then 38 Qg7#. So black moved Qh8 to prevent this, then realized that by blocking h8 black has given white 38 Qg6#, and thus, resigned.>|
No. 37. ..Qh8 is a positively horrible move. ..Qg8 would have stopped Qg7# without allowing Qg6#. In fact, White does not seem to be able to mate without promotion or a king march after ..Qg8.
That said, 37. ..Qg8 38. Qe7+ Kh8 39. Rxg8+ Kxg8 40. Qe8+ offers more than sufficient reason to resign.
|Aug-30-07|| ||Crowaholic: This was a rather tricky Tuesday. Bxg7 was subjectively simple, but Black has more options than it seems, because Jansa made several inferior moves. I didn't even find 34. ..Rf5! until I had my solution analyzed by a chess engine. I then analyzed this line without computer help (for exercise) and also arrived at the line which <whiteshark> named as a <technical win>. A highly instructive puzzle with a lot of hidden depth.|
|Aug-30-07|| ||xKinGKooLx: The first move was easy to find, the follow-up was a bit tricker. I found it after a few minutes of thought. The check from the Queen followed by the rook lift leaves Black helpless.|
|Aug-30-07|| ||YouRang: <Crowaholic: This was a rather tricky Tuesday. > Tuesday? :-)|
|Aug-30-07|| ||pandi: Not too hard for a Thursday. In fact, it was one of the first lines I considered.|
|Aug-30-07|| ||Monkey King: Ya, fairly easy.|
|Aug-30-07|| ||playground player: The Black King's shield has got to go; Bxg7 makes it so; And lest we fall to a back-rank mate, our own attack must not abate.|
|Aug-30-07|| ||zb2cr: <Crowaholic>,
You wrote, "In fact, White does not seem to be able to mate without promotion or a king march after ..Qg8." Well, yes, but with your line, or 38. Rxg8 (threatening Rh8#), Black loses his Rook and is down by Q vs. N and his defeat may be slow, but it's as sure as atomic decay.
|Aug-30-07|| ||Fourpointo: "Ah, my queen to h8 will stop him...dang it!"|
|Aug-30-07|| ||Crowaholic: <YouRang: Tuesday? :-)>|
Oh well, I got the first letter right. And the last four. :-)
To clarify, this was merely a Freudian mistake when I wrote the comment. I didn't expect the puzzle to be Tuesday difficulty.
<zb2cr: Black loses his Rook and is down by Q vs. N and his defeat may be slow, but it's as sure as atomic decay.>
Yes, White wins easily, but it's not mate in 1 like ..Qh8, so <not yet a patzer> is wrong about ..Qh8 being necessary to stop Qg7#. There is a better or let's say less horrible way to do that. I didn't want to suggest that Black has any reason to play on after ..Qg8, though, especially not against one of the Polgar sisters. :-)
|Aug-30-07|| ||efrain chavez: Old fashion me. Do not use computers. Can not find a winning line for white after
34 Bxg7, Kxg7, 35 Qf6+ Kh7, 36 Rf3 Nd6 !!
Now the black queen has f7 supported to meet treats to g6 and g7, and the h5 square is still covered by both queen and rook. I must be missing something.
|Aug-30-07|| ||YouRang: <Crowaholic> Next time you make this Freudian mistake, you might consider trying "Thusday". That way, the mistake is equally ambiguous. :-)|
|Aug-30-07|| ||MostlyAverageJoe: <efrain chavez: Can not find a winning line for white after 34 Bxg7, Kxg7, 35 Qf6+ Kh7, 36 Rf3 Nd6>|
Easy: 37. Rg3 <threaten Qg7#> Qf7 <as good as forced because of the threat> 38. Rh3+ Rh5 and now: QxQ+ NxQ RxR+, end up with rook and 3 pawns against knight and 2 pawns (with b6 pawn to be soon destroyed).
No computer used for the above (busy with GMT).
|Aug-30-07|| ||Some call me Tim: As to why Jansa had the temerity to play 37...Qh8: often times a player makes a move knowing it is lost and instantly resigns, out of frustration or spite. You have to resign when it is curtains, though. Giving another player a mate is deemed amateurish..."what, you didn't see this"?? Also do not forget eye contact. Polgar could well have looked at Jansa, who was probably not even looking at the board by now, with that "Really, you're not going to make me play this, are you?" look. In short, you had to be there.|
|Nov-07-07|| ||sallom89: i don't understand why a strong player like her would stop playing since 2002.|
|Nov-07-07|| ||SickedChess: <<sallom89:> i don't understand why a strong player like her would stop playing since 2002.>
When she move to Toronto even her husband GM Yona Kosashvili leave the chess scene.|
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