< Earlier Kibitzing · PAGE 1 OF 4 ·
|Aug-20-09|| ||mckmck: Rxb7 and then Qh6 is the move|
|Aug-20-09|| ||OBIT: No sweat...
First break Black's mating threat (i.e. Qxg2# if the queen goes to h6) by playing 27. Rxb7. After 27...Qxb7 28. Qh6 Rg8 29. Rf3, and Black has no answer to Qxh7+ followed by Rhe#.
|Aug-20-09|| ||Shyfe: A common attacking theme is the idea of this puzzle. Qh6 forces Rg8 to defend Qg7#. Then, after Qxh7+ Kxh7, a white rook can swing over to the h-file to checkmate. |
The bishop on d3 is in the way, so White must move it with a threat. Be4 fails to Qxe4 threatening Qg2#(I almost overlooked this). Thus, the solution is Ba6 which wins significant material. Black cannot take the Bishop or he gets mated (see above).
|Aug-20-09|| ||OBIT: Ha, not the move played. Now lemme figure out what trap I just fell for...|
|Aug-20-09|| ||Shyfe: 27.Rxb7 Qxb7 28.Qh6 rg8 27.Rf3 loses to 27...Rc1+ 28. Kf2 (Bf1 Rc3) Qb2+|
Now, Kg3 blocks the White's plan and Be2 is met with Rc3.
|Aug-20-09|| ||OBIT: <Shyfe>Yep, was just about to post that. Neat refutation.|
|Aug-20-09|| ||SamAtoms1980: I totally barked up the wrong tree.
It was a surprise to find out that 27 Bxg6 was not played. After 27 ... fxg6 28 Rh3, White threatens 29 Qxg6. If 28 ... Rg8, I was going to play 29 Rff3, intending Rfg3 and threatening 30 Rxh7+ Kxh7 31 Rh3#.
Never mind that after 27 Bxg6 Rg8, 0-1 is about as good a follow-up as any....
|Aug-20-09|| ||dzechiel: White to move (27?). Black is up a pawn. "Medium."|
Of course white would like to play 27 Qh6 in this position, but there are two problems:
1 - Black would simply play 27...Qxg2#, and
2 - Black could defend (at this point) with 27...Rg8
If the mate by black wasn't on the board AND the white bishop was on another square, then after 27 Qh6 Rg8 white could finish up with 28 Qxh7+ Kxh7 29 Rh3#.
So, the question is, what move can we make that solves both of these issues? We could try
attacking the queen. If black blundered and played 27...Qd6 we could pull off the combination mentioned above. But it's far more likely that the black queen will stay on the long diagonal with something like
now threatening to exchange queens. This doesn't look good for white at all. No, I think the key move must be something like...
27 Rxb7 Qxb7 28 Qh6 Rg8 29 Rf3
Now the only way to stop the mating combination is to give up the queen for the rook.
29...Qxf3 30 gxf3
getting queen and bishop for two rooks. This may be it, but I suspect that there's better play by white available. Even though white has picked up some material, it's a long hard slog to the finish from here.
Time to check and see how this played out.
Yup, Gligoric found the better move. <sigh>. I see the line that <Shyfe> posted busts my analysis wide open. I should have kept looking.
|Aug-20-09|| ||waustad: I fell for the same sorts of lines as most of the posters so far. I rejected f3 to prevent mate because it kept the rook from sliding over to the king side to finish the attack that I thought was there.|
|Aug-20-09|| ||TheBish: Gligoric vs Sveshnikov, 1986|
White to play (27.?) "Medium"
White is down a pawn, but that doesn't appear to be significant here. More importantly, White's queen is defending against a mate on g2, which rules out an immediate 27.Qh6??. I noticed that if White's bishop were somehow able to divert either the Black queen or bishop off the battery on the long diagonal, that would simultaneously open up the 3rd rank for the rook on b3 and allow 28. Qh6 Rg8 29. Qxh7+! Kxh7 30. Rh3#. Actually, such a move exists!
The only reason I found this move is by the above reasoning. Otherwise, who would ever think of it? Now, Black has only a few logical responses, but they all lose.
A) 27...Bxa6 28. Qh6 Rg8 29. Qxh7+! Kxh7 30. Rh3 mate.
B) 27...Qxa6 28. Qh6 Qxf1+ (a computer-type move to delay the end, otherwise this line is nearly identical to A) 29. Kxf1 Rc1+ 30. Kf2 Rg8 (additional checks are futile) 31. Qxh7+ Kxh7 32. Rh3#.
C) 27...Rb8 (or Rc7) 28. Bxb7 Rxb7 29. Qh6 Rg8 30. Qxh7+ Kxh7 31. Rh3#.
D) 27...Ba8 (forced, in evidence of the above lines) 28. Bxc8 Rxc8 and White will eventually win.
|Aug-20-09|| ||Manic: Funnily enough, I found 27.Ba6! after thinking I needed the Rb3 for the Qxh7+ trick and so did not want to give it up. Weird that I did not consider the idea of lifting the f3 rook instead, although it still loses.|
|Aug-20-09|| ||Jimfromprovidence: I thought I had it. 27 Rf3 Qc1+ 28 Bf1 Bxf3 29 Rxf3, below.
(seeing Qh6, Qxh7...Kxh7, then Rh3#)
click for larger view
But that line loses to 29...Rg8 or even better, 29...Rc3.
Better luck tomorrow.
|Aug-20-09|| ||goldenbear: I saw Ba6 in about 10 seconds. I tried Bb5, that didn't work, has to be Ba6. I thought White would play 29.Rg3 though.|
|Aug-20-09|| ||mpl: The idea 27. xb7 xb7 28. h6 g8 29. f3 xh7, h3 mate doesn't work, due to black's counterplay with rook and queen on two open lines, e.g. 29... c1+ 20. f1 c3, so 27. a6! is the much better move two free the third rank for the rook and deflecting the bishop. But unfortunately Gligoric missed, after 27... a8, the move 28. g3, which follows the initial idea of h6, xh7, h3#. Black must give a lot material to avoid this mate threat.|
|Aug-20-09|| ||Jimfromprovidence: I found one nugget, though, with confirmation from Rybka freeware.|
This is a fine derivative puzzle that requires precise move order and some subtle moves. Move 30. White to play and mate.
click for larger view
Solution to follow if not solved.
|Aug-20-09|| ||BlackWaive: Well, I did notice that 27. Ba6 won the exchange (as 27...Ba8 is forced), but I went the extra mile to find|
27. Rxb7 Qxb7 28. Qh6 Rg8 29. Rf3
with the threat of 29...Rg8 30. Qxh7+ Kxh7 31. Rh3# or else 30. Qg7#. Unfortunately, it appears that 29...Rc1+! is a refutation, as noted by previous kibitzers. I'm certainly glad that I didn't play this OTB...
|Aug-20-09|| ||Once: Sherlock Holmes used to say something like "when you have eliminated the impossible, whatever remains - however improbable - must be the truth." Finding today's solution is a case of eliminating the moves that don't work.|
27. Qh6 Qxg2# Oops.
27. Rxb7 Qxb7 28. Qh6 Rg8 and white is going nowhere. Similarly with 28. Rf3 Rc1+
27. Bxg6 fg and black defends against fhe mates on g7 and h7 with Rf7.
27. Bb5 and now black has either Qd5 or Qc2 with far too much activity.
We need a move which hits black with a threat and preferably disrupts the Bb7/Qc6 battery and frees up the third rank for the Rb3. And after interrogating many suspects, we happen across 27. Ba6! Now on either 27...Qxa6 or 27....Bxa6 we play 28. Qh6 with unstoppable mate.
27. Ba6 leaves black with an unpleasant choice - allow mate, give up the bishop or give up the exchange.
Incidentally, Fritz prefers 27...Qxg2+ for black, giving up the bishop for the g pawn, but with a queen swap thrown in too. May be obbjectively the best move, but as black I would prefer to keep the queens on for a grim defence. The more pieces on the board, the less the material imbalance.
I suppose the moral of today's puzzle is to check, check and check our tactics. Puzzles can lull us into a false sense of security. Apart from spoilers, puzzles contain a tactic that works. So if you spot a neat looking tactic in a puzzle, there is a good chance that it will work.
But in the real world, this rule doesn't apply. If you spot a neat looking tactic, there is a good chance that it won't work. I have lost far too many games by "hope chess" - playing a fancy looking move that I hope will work, but really has a nasty hole (usually right at the end).
As my hair drops out and what is left turns grey, I am turning from an eternal optimist to an occasional pessimist. Instead of thinking "I am sure it will work", I usually think "now where is the embarrassing refutation that will blow me away this time?"
So I got today's puzzle by being an old git...
|Aug-20-09|| ||ozmikey: Oddly enough I got this one much more easily than yesterday's. Probably because the idea of deflecting either the B or the Q from the battery on the a8-h1 diagonal, so as to allow the standard combination beginning with Qh6 etc., was so clearly indicated.|
|Aug-20-09|| ||zooter: Material is even (almost) and white can try
27.Qh6?? (threatening 28.Qg7#) but loses to 27...Qxh2#
So, we need to find out ways to get rid of the pesky queen/bishop diagonal. How about
27.Rxb7 Qxb7 28.Qh6 Rg8 (only move) 29.Rf3 (threatening 30.Qxh7+ Kxh7 31.Rh3#)...and now I thought
29...Rc1+ 30.Bf1 and black has no more spite checks, but 30...Rc3 seems to hold...
I've been looking at this and still don't see the finish...will peek as i'm in a hurry
|Aug-20-09|| ||zooter: aha, right ideas (sac queen on h7 and do a corridor mate) but wrong implementation.|
27.Ba6 never struck me as both the bishop and queen can take the bishop for free, but then black loses the g2 mate threat and allows white 28.Qh6 with mate to follow
|Aug-20-09|| ||zooter: extra note: I was trying hard to get 27.Bd5, Bb5 and even Bc5 to work, but never struck me that 27.Ba6 is also a candidate...|
|Aug-20-09|| ||obender71: It taked me a while to find the right place for the bishop. The time to awaken a bit, just lifted from the bed ... zzz|
|Aug-20-09|| ||banjo: hello
okay , i had
but now i wanted to play
and i still think this wins easily
but , nobody mentioned it
am i wrong ? thanx
|Aug-20-09|| ||banjo: well , i see
black has 29. - Qe8
to stop the mate .
didn't consider that he
goes off his mate threat .
i definitley shoudn't post anymore
|Aug-20-09|| ||jkundzik: It seems that white could play better: 28.Rg3! Qc5 (28...Rcd8? 29.Qh6 Rg8 30.Qxh7 Kxh7 31.Rh3#) 29.Qh6 Rg8 (29...d3+! 30.Kh1 Bxg2+ 31.Kxg2 Qd5+ 32.Rgf3 Rg8 33.Bxc8 ) 30.Rh3 d3+ 31.Kh1 Qh5 32.Rxh5 |
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