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Later Kibitzing> |
| Jul-31-09 | | LIFE Master AJ: To me, this was a rather simple puzzle. I spent all my time on 22.BxP/f7+, Kf8; (After the capture with the King, it looks like Black gets mauled.) 23.Rf1, Bf6; when it looks like White should sack on f6, but the exact way to do it wasn't so easy to see ... some of the lines you have to calculate 6-10 moves ahead. |
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| Jul-31-09 | | jsheedy: Tough one! I'm trying all kinds of clearance sacs: Rc7, Rxa6, Rxc8+, Rf6, and none of those seems to work. I'm opting for 22. Rd6, Bxd6, 23. Bc6+, Kf8, 24. Qxd6+, Qe7, 25. Qxb8 with material advantage and an attack. This had better be right, cuz I spent 20 minutes on it! |
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| Jul-31-09 | | David2009: Friday's puzzle F Handke vs K Bischoff, 2001 White tto play 22 ? Difficult White has a lead in development and needs to act: passive tactics are useless. Black is a Pawn up and is threatening to castle K, consolidate, continue the Q side attack, and win the end game and/or middle game. I did consider Qh5 briefly but this move is (a) much too slow (b) illegal. This leaves only 22 Bxf7+ Kxf7 23 Qd5+ Kf8 24 Qxe5. White has a pawn for a Bishop but Black's KR is out of play for some time and the WN can enter the fray via d4. Meanwhile the Pg7 is en prise and when it goes this will enable the BK and BR to be harried from different directions. This combination is easy to see, but Black has too many defensive possibilities for me to attempt to analyse them in detail. Perhaps this is why the puzzle is graded "difficult". Let's find
out.
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Not very good tactical analysis. White's position after Qxe5 is even better than I had visualised, because of the threat of Rc7 as well as everything else, and Rf1+ is deadly in
response to Kf8 as <OBIT>, <dzechiel>, <CHESSTTCAMPS>, <gofer> and no doubt others all point out. |
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| Jul-31-09 | | Patriot: Initial candidates: Rxc8+,Bxf7+
I quickly discarded Rxc8+ as a good candidate. Bxf7+ is far more interesting. 22.Bxf7+ Kxf7
Here I considered 23.Rf1+ and 23.Qd5+. Both look uncomfortable for black and so the choice was a little difficult. But after 23.Rf1+, 23...Bf6 or 23...Ke8 seem to be viable options without looking any deeper. However, 23.Qd5+ limits blacks options far more. 23...Ke8 looks like the only move that doesn't lose immediately. So I decided on 23.Qd5+. 23.Qd5+ Ke8
Here I looked at 24.Rf1 but decided the simple 24.Qxe5 grabs the second pawn for a piece and threatens 25.Rc7 and 25.Qxg7 with lots of compensation. This appears too much for black to handle. 24.Qxe5  |
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| Jul-31-09 | | jsheedy: Drat, wrong again! |
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| Jul-31-09 | | LIFE Master AJ: I am not sure the sack Nd5 was completely sound, its a little before 9 AM (here) ... time to fire up Fritz. |
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| Jul-31-09 | | desiobu: My first correct Friday puzzle! |
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| Jul-31-09 | | kevin86: I can usually get the first move or two,but looking for the most forceful opening move. My record gets hazy after the second move,however. Here,white forces the king into the open and then goes after the seventh rank-first by a pin,then by an attacking move. |
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Jul-31-09
 | | Jimfromprovidence: It would have been interesting to see what would have happened it black had played 24...Bg4 instead.
click for larger viewSure, white can play 25 Rc7 and win material right away. But there are traps as well, because black has back rank threats. 25 Rd2?? loses to 25...Qg2+ with mate to follow.
25 Rf1?!, below, leads to 25...Rb5 and black looks OK.
click for larger view25 Re1 seems to be the best move to keep all of white's threats intact. |
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| Jul-31-09 | | CHESSTTCAMPS: <Jimfromprovidence>
You always seem to find interesting sidelines that other people ignore. In fact, I intended to give this specific move a little more attention, but I ended up lumping it into my B.2 variation. <agb2002> gave more detail with <A.1.a) 24... Bg4 25.Rc7 Qxc7 26.Qxc7 Rd8 27.Rxd8+ Bxd8 28.Qxg7> Another idea here is 26... Rc8 27.Qb7 Kf7 to defend the threat of Re1 and hoping for 28.Re1 Rhe8 where black is still alive, but 29.Rf1+ Ke8 30.Re1 is deadly. |
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| Jul-31-09 | | Samagonka: The first 2 moves were quite logical to me but I wasn't quite sure about the continuation. Neither didn I expect black to throw in the towel that quick. |
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Jul-31-09
| | Jimfromprovidence: <CHESSTTCAMPS> <You always seem to find interesting sidelines that other people ignore.> Thanks. I appreciate your reviewing my posts. I missed the key move in the puzzle, 24 Qxe5, so I tried to find other angles to pursue. To add to my previous post, the Rybka freeware much prefers 25 Re1 to Rc7 after 24…Bg4. For example, if black tries to prevent Rc7 with 25…Rc8, white can counter with 26 Na5!
click for larger viewBlack cannot play 26…Rxc6, because white has 27 Nxc6, attacking the queen and triple-attacking the pinned bishop. In the above diagrammed position, I’m not sure what black can do to survive. |
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| Jul-31-09 | | gpnema: This Is Ok |
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| Jul-31-09 | | TheSlid: I saw the first 2 moves quite quickly and concluded "and wins". Shows I was born a long time before computers could do the hard work! |
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Jul-31-09
 | | gawain: Saw the first two moves but did not see how to follow up. I think I considered everything *except* 24 Qxe5. The threat of 25 Rc7 is subtle but strong. That's the way these Difficult ones so often are. Easy to get started but hard to spot the death blow. |
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| Jul-31-09 | | DarthStapler: I at least considered the first 3 moves |
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| Jul-31-09 | | lzromeu: I do it.
It's a kind of premature resign in midle game.
The final battle would be very interesting: Q+K+R against 2*B+2*R (9+3+5 against 2*3,5+2*5 = 17), insn´t it. |
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| Jul-31-09 | | WhiteRook48: Rxa6?? |
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| Jul-31-09 | | wals: The following may be of help to those wanting help
[
[Site "Altenkirchen GER"]
[Date "2001.12.04"]
[Round "5"]
[White "Florian Handke"]
[Black "Klaus Bischoff"]
[Result "1-0"]
[ECO "B60"]
[WhiteElo "2407"]
[BlackElo "2541"]
[Annotator "Rybka 3 1-cpu (30m)"]
[PlyCount "49"]
{B60: Sicilian: Richter-Rauzer: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Qb6
8. Nb3 a6 9. f3 Qc7 10. O-O-O Rb8 11. Bd3 Be7 12. f4 b5 13. Rhe1 b4 14. Nd5
exd5 15. exd5 Nxd5 16. Be4 (16. Bxh7 Rxh7 17. Qxd5 Kf8 18. Bxe7+ Nxe7 19. Qxd6
Qxd6 20. Rxd6 Bf5 ) 16... Bxg5 17. Bxd5+ Be7 18. Re4 (18. Qe3 Nd8 19.
Nd4 ) 18... Ne5 19. fxe5 dxe5 20. Rc4 Qb6 21. Rc6 Qa7 22.(+4.56) Bxf7+ Double
attack: e5/f7 Kxf7 23. Qd5+ Ke8 24. Qxe5 Bd7 25. Rc7 1-0 |
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| Jul-31-09 | | johnlspouge: Friday (Difficult):
F Handke vs K Bischoff, 2001 (22.?) White to play and win.
Material: N for B+P. The Black Ke8 has 4 legal moves, 2 of them on the d-file x-rayed through the White Bd5 by the White battery Rd1 and Qd2 and the saving grace 22…O-O. The possibility of 23…O-O (a default in puzzles) means a decisive candidate must be forcing. The White Bd5 has a check Bd5xf7+ and (if the White Rc6 clears c6) a potential check Bd5-c6+. The position is therefore ripe for discovered attacks and clearances. The White Kc1 is secured from checks. Candidates (22.): Bxf7+, Re6, Rd6
22.Bxf7+ Kxf7 [else, meekly drop a P] 23.Qd5+
(1) 23…Ke8
24.Qxe5 (threatening 25.Rc7 26.Qxe7#, and if Black permits, 25.Qxb8 or 25.Rxc8+) The threat 25.Qxb8 burdens Qa7; the threat 25.Rxc8+, Rb8. The White Qe5 pins Be7, leaving the Black Bc8 to parry the threats, but lacking a base at Pf7, it cannot. White regains the B, remaining at least a P up. (2) 23…Kf8 24.Qxe5 (threatening as above)
Compared to Variation (1), Black has 1 additional defense: 24…Bf6 25.Rxf6+ (threatening 27.Rd8+)
25…gxf6 26.Qxf6+ (threatening 27.Rd8+)
Black cannot avoid mate. |
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| Aug-01-09 | | tivrfoa: why 18. ... Ne5? :/
. Nd8
. Be6
. f5 |
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| Aug-01-09 | | KastelFhlor: 23...Kf8 is a stronger defensive move |
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| Aug-02-09 | | LIFE Master AJ: Did anyone else look at the Nd5 here with a good computer program? What conclusions did you draw? (You may be brief, you don't have to post a lot of analysis, unless you just want to.) |
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Aug-02-09
 | | Chessical: <14.Nd5> is not a computer approved move, (they prefer moving the N to either e2 or a4), and both Fritz and Rybka suggest that after: <18... Bb7> 19. Rde1 O-O 20. Bxc6 Bh4 21. Bxb7 Bxe1 22. Qxe1 Qxb7 that Black is winning. |
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| Aug-02-09 | | LIFE Master AJ: <chessical>
Probably - in the old days, before computers - someone would have attached two exclams to that move. |
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Kibitzing
sac: 14.Nd5