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| Mar-11-09 | | agb2002: <sfm: <agb2002: Five years since the March 11 attacks in Madrid. Many of us will never forget and will never forgive...> Or be forgiven? For each crying mother after Madrid 3-11 there are thousands in Iraq as a result of an onslaught, at the time supported by the government in Madrid, against the majority in UN.> Please enable your forum and I'll answer you there. |
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| Mar-11-09 | | solskytz: A second and a half to get the basic idea, 5-6 more seconds to see that no defense of the e8 rook will do and there's nothing else to do. Contrast this with yesterday, where I had to struggle for several minutes to see that 2. Qd8+ isn't only a nice check but a promise of short-term devastation |
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| Mar-11-09 | | jackpawn: I found it fairly quickly, the back rank mate possibility immediately jumped out at me. Then it was just a matter of determining how to take advantage. |
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| Mar-11-09 | | kevin86: A fabulous one-two punch of last rank threats. Against such diabolie,black must yield. ONE! 26...♖xd8 25 ♖xd8#
TWO! 27...♕xe7 28 ♕xe7 ♖xe7 29 ♖d8+ and mate next
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| Mar-11-09 | | YouRang: Pretty easy for a Wednesday. :-)
Seeing black's back-rank vulnerability, 26.Qd8 is easy to spot. Obviously, white need not fear 26...Rxd8 -- rather, black needs to be worried about 27.Qxe8#. With our DSB hitting f8, it seems that black must protect the pinned rook with his queen (i.e. 26...Qe6). But then this protection is cut off with 27.Be7!, threatening Qxe8#. Taking the bishop with 27...Qxe7 loses to 28.Qxe7 -- and the rook still can't take the queen! (28...Rxe7 29.Rd8+ ~#) A great example of how insidious back-rank vulnerabilities can be. Squares that look well-guarded aren't really guarded at all! |
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| Mar-11-09 | | actinia: is there any way to see this week's worth of puzzles? several people commented on yesterday's puzzle but I missed that one. |
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| Mar-11-09 | | JG27Pyth: The back rank theme came very quickly but I struggled to find that interference move with the Bishop. I did find Be7 in the end... but I probably lost on time first :( |
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| Mar-11-09 | | Patriot: <JG27Pyth: The back rank theme came very quickly but I struggled to find that interference move with the Bishop. I did find Be7 in the end... but I probably lost on time first :( > Time seems to be my biggest problem. Last night I played a rated USCF tournament and squeeked by with a draw against an 1800 (with only 2 seconds left) and later lost to a player around 1650 (close to my rating) in an EASILY winning position--my flag fell! Does anyone else have this problem and if so, what do you recommend? |
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Mar-11-09
 | | Jimfromprovidence: Black should have played 24...Bxe8 instead of Rxe8, providing his own bishop interference against a back-rank attack attempt. 
click for larger view Now 25 Qd2 is no good as black has 25...h6 or the even better 25...c5. 
click for larger view The bishop has to vacate the a3-f8 diagonal, allowing black's king access to the f8 square, if needed. |
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| Mar-11-09 | | illowl: At first glance I tried 26. Qd8 and had a moment of hesitation due to the reply 26...Qe6 wrapping it up. So i found the idea of 26. Be7 with quite impressive interference. Only then I've realized that the key is to connect these two moves in correct order. But it was quite easy: took me about 20 seconds, I think. |
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| Mar-11-09 | | cyclon: 27. Be7!!. |
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| Mar-11-09 | | Woody Wood Pusher: A microsecond solve. Easier than yesterday IMO. |
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| Mar-11-09 | | Samagonka: Piece of a pie. |
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| Mar-11-09 | | ZUGZWANG67: Okay. Strangely enough, I find the puzzles of this week harder than usual. Maybe is it just me, I don' t know. Anyway, the obvious 26.Qd8 is hard to miss, but Black has a defense, namely 26. ...Qe6, 26. ...Qe5, or 26. ...Qe4. But I think that 27.Be7, the move that caused me trouble finding, closes the deal, the interference being fatal for Black. That is because 27. ...Qxe7 28.Qxe7 wins the BQ. Time to check it out. (GULP!) |
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| Mar-11-09 | | ZUGZWANG67: This is it. Let' s see what others had to say. |
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| Mar-11-09 | | ZUGZWANG67: <CHESSTTCAMPS: <Although this puzzle was much easier to solve than yesterday's puzzle, it is actually more essential, illustrating key tools (use of interference and exploitation of back rank weakness) that must be in a tactician's bag of tricks.>> I do agree and moreover, I think that one should always try to find the appropriate tool in the tactician' s bag instead to find a move. For example, is there a possibility of a pin ? can I use interference ? back rank mate threat ? etc... Today, It took to long for me to find a move, namely, 27.Be7. Instead, I should have tried to find something in my bag. Good lesson for me !
Peace !
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| Mar-11-09 | | MiCrooks: This came to me immediately - so unlike the last two days I think this is at or even slightly below the appropriate level for this part of the week. Since the key Qd8 is a non-forcing move that doesn't involve a capture it is probably a little harder for a novice to see. What immediately pops out of the postiion is the back rank weakness for Black. That and the fact that f8 is covered by the Bishop. Combined it makes Qd8 and obvious choice as Black cannot simply retreat the Rook to f8. So Black covers with the Queen. I was looking at Qe6, in the game it was Qe4, it doesn't really matter. The "hard" move to find then is Be7 which interferes with the defense of the Rook. This is a hard move for a beginner especially as the square is covered by Black twice!! But the Rook is pinned and after Qxe7 Qxe7 Rxe7 is mate after Rd8. On second thought, I think this is nice Wednesday fare...I think it just seems a bit of a let down after the upgrades of Mon and Tues :)! |
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| Mar-11-09 | | fouard: To "Totalnewbie" and "Dr.J":
I agree the post from "dzechiel" is incorrect - not only does 28 Qxd7 NOT win a piece, but Rxd7 cleans house. |
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| Mar-11-09 | | ZUGZWANG67: <JG27Pyth: <The back rank theme came very quickly but I struggled to find that interference move with the Bishop. I did find Be7 in the end... but I probably lost on time first :( >> <Patriot: <Does anyone else have this problem and if so, what do you recommend?>> I do have the same problem. I take too much time finding such (27.Be7) move. But I think that I found something in <CHESSTTCAMPS> ' s post. He suggested that one needs what he calls 'the tactician' s bag' to find 29.Be7. And to this, I replied that instead of trying to find a move, it was more logic (and probably faster too!) to find the appropriate tool in one' s 'tactician bag', namely here, interference. For instance, it was yet obvious that after 26. ...Qex, the e-file played a vital role in Black' s defense. One' s question could have been something like: 'Is there any kind of interference to be used on that e-file?' And to such a question, the use of the B would have been kind of revelation, I think. Peace!
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| Mar-11-09 | | ZUGZWANG67: I meant 27.Be7 instead of 29.Be7 |
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| Mar-11-09 | | WhiteRook48: this was easy!! |
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| Mar-11-09 | | Zorts: Chessgames: Quite a few of these posts, and myself, said this one was easier than monday's and tuesday's; probably because of the beginner's-level book Bobby Fischer Teaches Chess which has tons of back rank mate examples. |
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| Mar-14-09 | | patzer2: For the Wednesday March 11, 2009 puzzle solution, White takes advantage of Black's weakened back rank with 26. Qd8!! and the followup 27. Be71  . |
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| Sep-06-12 | | whiteshark: <Sperrzug> I wonder why Tartakower named the diagram (after 25...Bc8) in his bio "<Storm over Asia>"? |
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| Sep-06-12 | | Tired Tim: <whiteshark: <Sperrzug> I wonder why Tartakower named the diagram (after 25...Bc8) in his bio "<Storm over Asia>"?> I don't know ... how about a possible reference to the Russian film of that name, where a principal character is swindled out of that which is rightfully his ... was Tartakower suggesting that black could / should have held this? |
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