< Earlier Kibitzing · PAGE 3 OF 3 ·
|May-02-07|| ||Tactic101: Sorry about that. Must have incorrectly visualised the pieces. Silly me. :(|
|May-02-07|| ||Kings Indian: Easy, I'm too familiar with this tactic.|
|May-02-07|| ||Tactic101: Qh5 seems to be the answer. Threatening mate with Bg6+ and Qh7#. See <CRwyn>'s line to find out what white plays against Bg5 and Bh6. My last error was just another case of blindness, which, unfortunately, occurs occasionally often when solving puzzles.|
|May-02-07|| ||Whitehat1963: To me, this one was easier than both Monday's and Tuesday's puzzles.|
|May-02-07|| ||CheckWhat: Instead of 18...Bxf6, why not 18...g6. Sure you'll be a piece down, but the game will go on, you increase your chances of winning. 18...Bxf6 is a sure lose.|
|May-02-07|| ||YouRang: Pretty simple. Remove knight, take h pawn with bishop sac to open up queen & rook attack.|
The only complication is if black declines the sac w/ 19...Kh8. White can still continue with 20. Qh5, but now black has time for 20...Bg5 (preparing to block at h6).
White can add pressure to h6 with 21. Ng4, and after this there were too many variations swimming in my head to keep them all straight.
However, I did see that if the black bishop takes my rook with 21...Bxe3, then 22. Bd3+ Bh6 23. Nxh6 (diagram:black to move)
click for larger view
And now white threatens Nxf7++ (double check with mate to follow), so black will lose the queen, and the game shortly thereafter.
|May-02-07|| ||kevin86: Yesterday,we removed a knight for a quick checkmate;today we do it for a more subtle reason:to set up another sacrifice. The entrance of the queen and rook into black's game means defeat is right around the corner.|
Chess can be a scary game-black's position seems secure at move seventeen. By nineteen,it is in a shambles.
|May-02-07|| ||MiCrooks: As stated earlier, Bg5 not really a complication which is why Bogo resigned immediately. After Kh8 Qh5 Bg5 Bg6+ Bh6 Nf7+ either Rxf7 to avoid loss of the Queen and Bxf7 Black's King STILL is not all that safe (g4 g5 is threatened for instance) AND White is up two pawns AND an exchange!|
|May-02-07|| ||newton296: I thinking bogo , I got him if I can think this out. whites position is ideal for the final strike, ie Q at f3, rook already lifted to e3 and ready to support the queens mate threats, and a d3 bishop eyeing h7 plus and e5 knight to boot! basically its 18) bxh6 removing the knight's protection of h7 and then the bishop sak at h7 and white cant capture or mate in 3 after qh5+...kg8 rh3 mate next move. only other move kh8 is no good due too Qh5 threatning mate in 1 after bg6 + followed by qh7++|
|May-02-07|| ||newton296: correct microoks, black can resign even after kh8 but looks like u rangs continuations is much prettier as it gets black's q and wins easier. Nice find yourrang!|
|May-02-07|| ||newton296: blacks hemmed in bishop at c8 due to the ( qgd ) open reminds me of problems I had with my own locked up q side bishop when playing the french defense. Black here, as with the french in general has little control or defense of the kingside light squares and bogo gets thumped here as a result. In the french after taking similiar beatings I learned to play an early ...f5 to close of my kingside and block out white's prized (LsB). The other option is to fanagle an early trade getting rid of my q side bishop and then black's position looks rosy too!|
|May-02-07|| ||southeuro: textbook example: removal of defender... took me 2 seconds, should have taken only 1 :)|
|May-02-07|| ||imatos: <TrueBlue: 18. Bxf6 Bxf6 19. Bxh7+ Kh8 20. Qh5 Bg5 21. Bg6+ Bh6 22. Bxf7 Rcxf7 23. Nxf7+ Rxf7 24. Qxf7 Bxe3 25. fxe3|
is what I found. No mate, but winning eventually. My guess is that you need to have seen at least 21. .. Bh6 to claim full credit ...>
I agree! And while this wasn't particularly difficult, it wasn't trivial either. I would bet that most of the people who are bragging to have solved this puzzle withing seconds haven't seen that there is no possibility of either mate or queen capture after
19. xh7+ h8 20. h5 g5 21. g6+ h6.
In fact, things get somewhat complicated at this point, and I'm sure that even a master-level player would need some serious thinking on the 18th move to be absolutely sure that White will come out with a decisive material advantage after 22. xf7+ or 22. xf7 in this variation.
As usual, some people are bragging about guessing the first move without the analysis necessary to back up the solution.
|May-02-07|| ||thedoyle: took me about ten seconds to solve|
|May-02-07|| ||playground player: I solved the puzzle, all right--but only provided Black doesn't decline the Bishop sac. I saw Black's Kh8 instead of Kxh7 pretty quickly, and it does indeed complicate the situation. Too bad Bogoljubov didn't see it!|
|May-02-07|| ||fm avari viraf: It's a standard pattern attack first sacrificing the Bishop & if Black accepts he will be mated soon otherwise he will have to give his Bishop & Queen to prolong the agony. But if Black declines the sac he will still be in soup as <YouRang> analysis shows.|
|May-02-07|| ||YouRang: Considering the line: 18. Bxf6 Bxf6 19. Bxh7+ Kh8 20. Qh5 Bg5...|
To be honest, the 21. Ng4 idea only occurred to me because I didn't see 21. Bg6 (which also looks winning).
For the sake of completeness, I just spent some more time looking at the 21. Ng4 line. Earlier, I considered the reply 21...Bxe3, but it appears that taking the rook might not not be black's best choice. Better is the immediate 21...Bh6. Then, 22. Nxh6, and we have this interesting position (diagram:black to move)
click for larger view
If 22...Kxh7, then 23. Nxf7+ and black's queen is lost.
If 22...gxh6, then 23. Qxh6 (threat: Bg6+ and Qh7#) f5 24. Bxf5+ Kg8 25. Rg3+ Kf7 26. Rg7+ and white will chew up material and mate soon.
If 22...Qd5, then 23. Nf5! exf5 24. Bg6+ Kg8 25. Qh7#
If 22. g6 (probably black's best choice), then 23. Nxf7+! R8xf7 24. Bxg6+ Rh7 25. Bxh7 Rxh7 26. Qe5+, and white is up the exchange and 3 pawns, not to mention black's king is totally exposed with white's heavy pieces closing in.
|May-02-07|| ||YouRang: Funny thing is, black is probably better off just taking the sac after all: 19...Kxh7 20. Qh5+ Kg8 21. Rg3 (threatening Qh8#).|
And now black returns the bishop sac with 21...Bh4 22. Rxh4 Qxh4 23. Qxh4 Rxc3. Sure, black has effectively lost a queen for rook trade. But at least the immediate mate threats are gone, the pawns are even (5 apiece) and black's king isn't running around naked.
Of course, white should still win handily.
|May-02-07|| ||Calculon: <Calling this opening the Botvinnik variation seems a little strange. Botvinnik was three years old when this game was played.>
<He was that good, that young. At three, Botvinnik was winning blindfold simuls against 40+ opponents. At two, he had celebrated brilliancies over Nimzovich and Alekhine. In utero, he could draw against the top players in Europe. He was so good that in anticipation of his advent variations were named for him even before he was conceived.>
Actually, this opening was named after Melvin S. Botvinnik, an elevator operator from North Egremont Massachusetts. He developed it while playing against hotel pages on his daily coffee breaks.|
|May-02-07|| ||YouRang: Funnier: <CheckWhat> probably had black's best defense: After 18. Bxf6, don't recapture at all! Play 18...g6 and proceed (merely) down a piece.|
|May-02-07|| ||Dick Brain: I don't think there is any need to have analyzed 19...Kh8 in this puzzle.|
|May-02-07|| ||Dr.Lecter: Actually, I missed this. I was looking for something more, well, complicated.|
|May-02-07|| ||Skylark: People are allowed to choose names such as <Dick Brain>??|
Anyway after The ... Bg5 followed by ... Bh6, black will be losing enough material to safely resign. This puzzle did seem somewhat like a textbook example of an assault from the front with a queen and rook.
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