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| Jul-01-07 | | Checker2: <dzechiel - 16 Ne5 Qe4 17 Rxb1 Qxb1+?>
Black has a better rook capture. 17 ... Qxh8# so the queen is doing the trapping rather than getting trapped!
I was liking Ne5 too until I noticed that. Trading queens doesn't really help the rook problem and leaves white with very little. Thanks for all the detailed posts. Not a bad week for me, this was the only one I totally missed. Thursday wasn't satisfying, and I gave up having found the sounder defense than the played line. |
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| Jul-01-07 | | charms: I think that Chandler calculated to, lets say, Bxf5 and decided that the compensation for the quality just MUST be good enough. |
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| Jul-01-07 | | tangobob: Wow, ingenious. The bishop-rook trade gets rid of the pesky bishop, but it also gives white a chance to mobilize the h1 rook (after the black bishop on b4 has to move to e7 to defend). It's one of those bold, uncovering moves that's easy to dismiss without real consideration (<dzechiel> didn't even list this as a candidate move, so I don't feel so bad!). |
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| Jul-01-07 | | xKinGKooLx: I thought that this was going to be the first week I would solve all seven puzzles. I had solved the previous six this week, but I didn't solve this one. I noticed that Black's queen was almost trapped, and the only squares it could go to were f6 and e4. So I thought the answer was 16.Ng5, with the idea of h4 and h5, pushing the queen away from guarding the bishop, and winning a piece. If 16. ...f6, then 17. Nxe6, and if 16. ...h6, then 17. Nxe6 again, with 17. ...fxe6, 18. Bxe6, and Black's king looks vunerable. I didn't think 16. Rxb1 led to anything. Very good puzzle. |
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| Jul-01-07 | | gnixon: <tangobob> The exchange sac comes out naturally when you notice the queen is trapped and under threat of Be3 and Bg5. The bishop must go, and if you consider Kg2 to double the rooks on it, it becomes clear you can change the order (Rxb1, Kg2) since the queen still can't escape. The last piece of the puzzle is that f5 (forced) leaves the e6 pawn pinned because of the king's exposed position. I thought this puzzle was much easier than the usual Sunday, but maybe I was just lucky to focus on the queen. |
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| Jul-01-07 | | Madman99X: Chessgames.com, not to nitpick, but move 22 should read Bb3+ :-) |
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| Jul-01-07 | | TrueBlue: ok, difficulty insane!
I have always been a little crazy, so maybe I have a shot. Black's only obvious weakness is the pinned king and must be exploited quick! So d5 springs out I believe white has good response in two cases:e.g.
16. d5 cxd5 17. Bb5+ Nc6 18. Ne5 is one line
16. d5 o-o 17. dxe6 is another
white seems to have small advantage in both.
Of course, if you are looking for deep analyzes, I am the wrong guy ... Happy CANADA day everybody!
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| Jul-01-07 | | erli: Is 18 f5 forced? It seems like bad move..... |
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Jul-01-07
 | | An Englishman: Good Afternoon: I got as far as Chandler's 19th move and decided that this was the line to play. There is a tempting but lesser continuation at the 18th move: 18.Ne5?!,Qf6; 19.Bg5,Qxg5; 20.Nxf7,Qf6; 21.Nxh8,Ke7; 22.a3,Ba5; 23.b4,Bb6; 24.Re1,Nd7 and the Knight seems to be in trouble. |
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| Jul-01-07 | | Checker2: Happy Canada Day, indeed!
<erli 18 ... f5?> Wouldpusher already answered this, eh. |
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Jul-01-07
 | | patzer2: With the decoy exchange sacrifice 16. Rxb1!! White begins a series of decoys and deflections to harass the Black Queen and expose the Black King to a withering attack. |
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| Jul-01-07 | | beginner64: The candidate moves are: Ne5, Kg2, Nh4, Rxb1.
Kg2 directly threatens Rxb1. In response, black could counterattack the bishop on f4 with Qf6. Be5 attacks the queen, enabling Rxb1. Now the question is, what have I missed, since that doesn't reach the "Insane" category by any chance.. Time to look. |
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| Jul-01-07 | | beginner64: Obviously, what I missed was:
16. Kg2 Be4 (a simple retreat).
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| Jul-01-07 | | simsan: <fezzik> by move 23 white actually has several good options. My computer actually prefers 23.Nd2 (eval +9.xx)
.. suggesting the line:
23. Nd2 Nd7 24. Qf3+ Nf6 25.Bxf6 Bxd2 26. Be5+ Ke8 27. Bxc7 winning the queen (and m8 will quickly follow). |
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Jul-01-07
 | | fm avari viraf: In spite of its intrique possibilities, I could sense that Black's Queen seems to be jeopardy & so my first try was 15.Ne5 if Qf6 then 16.Qe3 threatening Bg5! Now, 15...Qe4 then 16.Rxb1 Qxb1+ 17.Kg2 & the Black Queen will be running for her life. I'm happy that I was on the right track as Chandler. Happy Canada Day to all & will someone throw some light on it? |
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Jul-01-07
 | | dzechiel: <Checker2 <dzechiel - 16 Ne5 Qe4 17 Rxb1 Qxb1+?> Black has a better rook capture. 17 ... Qxh8# so the queen is doing the trapping rather than getting trapped!> Yikes! I can't believe I overlooked that! This did seem too easy. Thanks for the correction. |
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| Jul-01-07 | | IMDONE4: I wonder if Ian was in time trouble or something, because generally you don't play into force mate, then resign before your opponent moves. |
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| Jul-01-07 | | Crowaholic: My first candidate move is 16. Bb5!?
After 16. ..cxb5 17. Rc8+ Kd7? 18. Rxh8, White should win on material grounds. 18. ..Bd3 fails to Ne5+ and whereever the king goes, Nxg6 is now a check, so while Black loses his queen, White keeps his queen. Problem #1: After 17. ..Ke7 18. Rc7+ Kd8 19. Ne5 Qe4! 20. Nxf7+ Ke8 21. Qxe4 Bxe4, I don't see any White advantage, e.g. 22. Nxh8 Bxh1 23. Rc8+ Kd7 24. Rxb8 Rxb8 25. Bxb8 So Bb5 does not seem to be the move, or not yet.
Next candidate is 16. Rxb1, doesn't seem to be much use, but I have a hard time finding other forcing moves. Let's see. 16. Rxb1 Qxb1+ 17. Kg2 (seems less passive than Ne1) and now this does have a nice property: The black queen is absolutely forced to go back to g6. Peril lurks on every other reachable square. So 17 ..Qg6 Maybe we can exploit on this theme. Attacking the Q with the knight seems to be no use, though. But 18. Bd3 and now 18. ..Qf6 19. Bg5 and the Q is "checkmated". Then again, Black has 18. ..f5 Now 19. Bxf5 Qf7 20. Ng5 and it seems like things are getting tough for Black, but I'm too tired to calculate all the relevant lines. Taking a peek... Hmm. Black played 19. ..Qf6. Now 20. Bg5 Qf8 21. Bxe6 looks very strong, intuitively. Now White is attacking both K and Q, and the passive Black rooks and knight are no help. All this for the equivalent of a single pawn (B + P vs R). Taking another peek... Well, almost except that Black played 20. ..Qf7 followed by 21. ..Qc7. I'm too tired to even fully understand the rest of the solution, let alone finding the best moves on my own. All I can say by glancing over the remaining moves is that Black seems to be very much on the defensive by now. And Black resigned because of 26. Qxe7+ Qxe7 27. Rxe7# - very nice mating set-up by Chandler! |
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| Jul-01-07 | | Jake Robertson: Awesome Puzzle
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| Jul-01-07 | | LIFE Master AJ: It WAS a great puzzle!
I found the key move in a short amount of time, but did it in a weird way. I wanted to play Nh4, but Black had the defense of ...Qe4. This lead me to want to get rid of the Black Bishop on b1 ASAP. So I played Rxb1! But then after ...QxR/b1+; Kg2, I notice that Nh4 is useless ... or at least, not so great. But that's OK, because now I think I am on the right track now. (I like the capture on b1 because it gains a tempo, which is important because the Black King is still in the center. [The Morphy Principle.] I also notice (now) I have both 18.a3, and 18.Bd3. (At first, I cannot decide which one is better.) I finally choose 18.Bd3, because it is more direct ... my biggest weakness is getting too tricky ... at least, as concerns these puzzles. BTW, 18...f5 is 100% forced. (As far as a human thinks, anyway.) Otherwise 18.Bd3, Qf6?; 19.Bg5, and the Black Queen is lost. (Which is what I was trying to do in the first place, trap the lady.) |
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| Jul-02-07 | | whatthefat: It's frightening to admit, but I used almost exactly the same method of analysis on this problem as <LMAJ>. |
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Jul-02-07
 | | kevin86: Awesome! How quickly and deeply the white bishops penetrate the black position. White's passive rook was far less valuable than black's active bishop and thus was expendable. |
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| Jul-02-07 | | LIFE Master AJ: <whatthefat>
Great minds work alike?!?
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| Jul-02-07 | | whatthefat: Hmm.. Indeed. :) |
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| Jan-15-09 | | LIFE Master AJ: "Why did Black resign?" (IM)
Like, are you kidding me? (Splat on e7.) |
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sac: 16.Rxb1