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|May-23-09|| ||CHESSTTCAMPS: In this unusual position with both uncastled kings trapped in the center, white has a big advantage with both rooks deployed on open lines directed the white king, whereas black has the QR trapped out of play and the queen is also shielded from the defense of the king by white's e-pawn. Therefore, white should strike quickly at the traditional weak point f7, to create an entry point for the queen:|
A quick find, but it takes to time to find a feasible defense. It's certainly not the following:
A. 22...Rxf7 23.Qe6+ Ne7 (both alternatives allow an immediate mate) 24.Qd7+ Kf8 25.Qd8+ Rxd8 26.Rxd8#
So the only feasible defense to prevent mate starting with Qe6+ is to put the knight on e7 and defend it with the queen on c5 or g5. White's plan is to separate the black queen from the defense of the knight. Hence the following lines:
B. 22...Ne7 23.Qe6! (the Rf7 is still taboo because of Qd7+ followed by mate in two.)
B.1 23...Qc5 24.Rd6! Qg5 (24...Qxd6 25.Rxf8+ loses quickly as does Qb4+ 25.Nc3 and black runs out of useful checks) 25.g3! b6 (there is no good defense) 26.h4 and black can resign.
B.2 23...Qg5 24.g3 (threatening h4) g6 (creating a luft and threatening Rxf7) 25.Rxh7 Rd8 (forced) 26.Rxd8+ Kxd8 27.Qd6+ Ke8 28.Qb8+ wins.
C. 22...Qg5 23.Qe6+ Ne7 transposes to B.2.
I think that's it - time to check.
|May-23-09|| ||alshatranji: What about 22.Rd5? No one else seems to have considered this move.|
|May-23-09|| ||remolino: What is the purpose of 22.Rd5 ?|
|May-23-09|| ||Utopian2020: 23. Qe6 provides white a 6 point advantage, where as 23. Rd3 allows white only a 2 point advantage. That counts as having messed up in my humble opinion.|
|May-23-09|| ||kevin86: A sad story:white makes a brilliant winning move,but soon after fritters it away his ad.|
|May-23-09|| ||mmmsplay10: 40. Rb3 Ka6
click for larger view
may have a chance of changing the ending result from a draw to a white win...
if white can avoid all the checks
|May-23-09|| ||CHESSTTCAMPS: <remolino:> wrote <Agree with <ounos>, 24. g3 is simply out of reach for most of us, ...>|
To me this is a logical continuation. Black's queen is the obstacle preventing Qxe7#, so white wants to remove it from the protection of the knight. Because white's pieces are posted for other purposes, why not use a pawn (i.e. g3 then h4) for the task?
|May-23-09|| ||Marmot PFL: Although there are many variations it seemed easier to play than some earlier this week. The 1st 2 moves were easy enough to spot and black gets mated if he plays Rxf7.|
|May-23-09|| ||DarthStapler: I got the first move and black's reply, and I considered the second move. Pretty good for a Saturday if I do say so myself|
|May-23-09|| ||johnlspouge: < <CHESSTTCAMPS> wrote: <remolino:> wrote <Agree with <ounos>, 24. g3 is simply out of reach for most of us, ...>|
To me this is a logical continuation. [snip] >
To echo <CHESSTTCAMPS>' post in standard tactical terminology (forgive me, Phil), Black's Qg5 is burdened with preventing Qxe7#. White wants to overburden Qg5, so g3 then h4 does the job.
Overloading an already burdened piece is a common tactical motif, but it requires a player incorporate the identification of burdened pieces into his routine analysis. <CHESSTTCAMPS> identifies burdens routinely, where others might not.
|May-23-09|| ||CHESSTTCAMPS: In my initial post, the line that took me a while to work out was B.2, because I was fixated on the idea of 26.h4 (instead of the simpler Rxh7 which I noticed, but first thought could be defended by Rd8) Qc5 leading to the following diagram:|
click for larger view
Here I saw 27.Rxf8+ Kxf8 28.Qf6+ Kg8 (not Ke8 29.Qh8+) 29.Rd6 Re8 and I couldn't find a coup de grace. However, Chessmaster found the simple 29.Rc1 and white wins the Ne7 and should win the game if careful.
An interesting sideline.
|May-23-09|| ||MiCrooks: I found the shot within a few seconds and worked out that taking it leads to a quick mate. I didn't really look at other defences so didn't come up with Ne7 Rd3. Over the board if he played Ne7 I'm not sure what I would have played...I would think in the game line that Qxd3 Qxd3 Rxf7 might be somewhat unclear.|
|May-23-09|| ||MiCrooks: Ah...I misread the note...Rd3 is actually a blunder. Qe6 wins handily. It renews the mate threat on Rxf7 and opens a new one with Qxe7. After Qg5 defending e7, White's quite g3 threatening h4 is crushing. Best play is for Black to sack his Queen to avoid getting mated.|
|May-23-09|| ||MiCrooks: Oh and duh, Qxd3 doesn't work because of Rxf8+ but Qxe2+ Kxe2 Rxf7 would still be better than what Black gets after Qe6.|
|May-23-09|| ||zzzzzzzzzzzz: That was too easy.|
|May-23-09|| ||agb2002: Black is a pawn ahead, the queen ties up the some pieces around the white king and threatens 22... Nb6 23.Qc2 (23.Rd(f)3 Nxc4 24.Rxe3 Nxe3) Nd7, improving the position. However, White's heavy pieces aim at the black king, for example, if e6 were available for the white queen then 22.Qe6+ Ne7 23.Qd7#. This suggests 22.Rxf7:|
A) 22... Rxf7 23.Qe6+ Ne7 (23... Re7 24.Qg8#; 23... Kf8 24.Rd8#) 24.Qd7+ Kf8 25.Qd8+ Rxd8 26.Rxd8#.
B) 22... Ne7 23.Rxf8+ (23.Qe6 Qg5) Kxf8 24.Rd3 Qg5 (to defend the knight) 25.Rf3+ (25.Nf4 Qe5 26.Ne6+ Ke8) Ke8 26.Qf7+ Kd7 (26... Kd8 27.Qf8+ and 28.Qxa8) 27.Rd3+ Kc7 28.Nf4 Qf6 29.Ne6+
B.1) 29... Kc8 30.Rd8#.
B.2) 29... Kb8 30.Qe8+ Ka7 (30... Nc8 31.Rd8) 31.Qd7 followed by Rb3 and Nc5.
B.3) 29... Kb6 30.Rb3+ Ka7 (30... Ka6 31.Nc5+ Ka7 32.Rxb7#) 31.Nc5
B.3.a) 31... Qxf7 32.Rxb7#.
B.3.b) 31... b6 32.Rxb6 Rd8 (32... Rb8 33.Ra6#; 32... Kxb6 Nd7+) 33.Ra6+ Kb8 34.Qb3+ Kc7 35.Ne6+.
B.3.c) 31... b5 32.Qc4 followed by 33.axb5 (32... b4 33.Qa6+ Kb8 34.Qb7#).
B.3.d) 31... Rb8 32.Qc4 (threatening 33.Rxb7+ Rxb7 34.Qa6+ Kb8 35.Qxb7#) b5 33.axb5.
C) 22... Qh6 23.Rxf8+ Kxf8 24.Rd8+ Ke7 25.Qg8 (threatening 26.Rxc8, 26.Qf8+ Ke6 27.Nd(f)4+ Ke5 28.Qf5# and 26.Qf8+ Ke6 27.Qf5+ Ke7 28.Rd7+ Ke8 29.Qf7#)
C.1) 25... Qg6 26.Qf8+ Ke6 27.Nf4+ + -.
C.2) 25... Qf6 26.Qe8#.
I'm not very satisfied with line B, although the final attack looks decisive, but it's time to post, check and play my children.
|May-23-09|| ||agb2002: I saw 23.Qe6 Qg5 24.g3 but probably didn't pay too much attention to it because it didn't look very forcing.|
In any case, I have the impression that 23.Rxf8+ also wins.
|May-23-09|| ||beenthere240: <mmmsplay10> Could also change the game into a white loss. I'd hate to hand the initiative over to black in a position like that with an unprotected rook on b3. I can see not only the risk of getting mated by black but dropping the piece as well.|
|May-23-09|| ||butilikefur: Hi <Alshatranji>. After 22. Rd5 exd5 23. Qb5+ Kd8 24. Qxd5+ Kc7 25. Rf3 Qb6 (25...Qh6 26. Rc3+ Kb8 27. Rb3) 26. Rc3+ Kb8 27. Rb3 Qa6 28. Nd4 is winning. But if Black replies with 22...Ne7 then 23. Rd3 Qb6 and White has the same advantage as on the 22nd move.|
|May-23-09|| ||WhiteRook48: the only reason I thought of 22. Rxf7 is that the normal theme is to hang pieces weirdly|
|May-23-09|| ||Wayne Power: In the game, after 35 .. Kxe5, White just needs to play 36 Qc7+ . Eg 36.. Kd5 26 Rd3+ Kc5 27 Rc3+ Kd5 28 Qd7+ and either mates or skewers the Black queen in a few moves.|
|May-24-09|| ||gofer: I rather like...
22 Rxf7 ...
22 ... Rxf3 allows Qe6+ mating
22 ... Qg5 allows Rxb7 removing all blacks chances of defending his king
22 ... Ne7
23 Rd3 Qg5
24 Rxf8 Kxf8
25 Rf3+ Ke8
26 Qf7+ Kd7
27 Rd3+ Kc7
28 Nf4 ... (looking for a nice royal fork)
28 ... Qf6 (but Kb8 is okay too)
29 Ne6+ Kb8 (safer than Kb6)
30 Qxf6 gxf6
31 Rd7 with a one end game...
|May-24-09|| ||gofer: I think I prefer my version...
28 Nf4 keeps the pressure on the King and doesn't allow any counterattacks for the black queen and black immediately looses their Knight!
|May-24-09|| ||5hrsolver: The annotation on move 23 is beautiful.
I had the right idea but missed the solution because i lost a tempo by playing 23.Rd3. I thought I was gaining a tempo by this move but no.
23.Qe6 Qg5 24.g3 and black has no time to play 24..h5 to prevent 25.h4
in the annotation
Бе ? 23.Qe6! Qg5 (23...Qc5 24.Rd6 Qg5 25.g3! with the idea of h4 ) 24.g3! g6 (24...b6 25.e5 with the idea of h4 ) 25.Rxh7 Rd8 26.Rxd8+ Kxd8 27.Qd6+ Ke8 27.Qb8+
I would only add that instead of 27.Qb8+ I would play 27.Nf4 with the intention of 28.Rxe7+ Qxe7 29.Qxe7 Kxe7 30.Nxg6+ simplifying to a won pawn ending.
|Jun-01-09|| ||patzer2: For the Saturday, May 23, 2009 puzzle solution, White should have won with the demolition attack 22. Rxf7!! However, he missed the winning follow-up 23. Qe6! .|
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