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< Earlier Kibitzing · PAGE 4 OF 4 ·
Later Kibitzing> |
Aug-20-09
 | | ZUGZWANG67: Hm. Of course after 28. ...Rc5 W has 29.Qxc5. |
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| Aug-20-09 | | Jason Frost: <LIFE Master AJ> I think a human would be fairly likely to find 28. Rg3 over the board with something like more than 15 minutes to play. (Doesn't mean it's wrong to play 28. BxR) After quickly glancing at the position 28. Rh3 seems strong, but is somewhat threatless since white can't force Rg8 so 28. Rg3 appears to be the next move to look at. And after that the line is pretty forced and looks to be without much of a defense 28. Rg3 Qd5 (28...QxB 29. Qh6 Rg8 30. Qxh7+ Kxh7 31. Rh3#) 29. Qh6 Rg8 30. f5!! and Qhx7+, Rh3# mate can't be stopped |
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Aug-20-09
| | ZUGZWANG67: Thank you < ATHAMAS>. Indeed, 28. ...Rc3 seems sufficient. |
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| Aug-20-09 | | eric the Baptist: Yup, unless you have a pawn poised to queen, the rook and bishop are just about hopeless against that queen. |
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| Aug-20-09 | | squarepants: Be4 qxe4 rh3 does not work because of
be4 qxe4 rh3 qxg2+ |
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Aug-20-09
 | | Jimfromprovidence: <Althamus> <That's pretty instructional Jim, thanks. I forgot about the bishop on a8 for some reason? I saw the pin point but completely missed the subtle h3. That is beyond my grasp to be that exact 6 moves ahead unless I study position for an hour =P> Rybka found it. It took a while to figure out why it works, though. FWIW, another variation in that line is 32...Bxg2.
click for larger view
Here white must not go for the trap 33 Kxg2 because 33...d1Q 34 Rxd1 Qc2+ becomes a draw. Instead, 33 Qh6 keeps the mate on track. |
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| Aug-20-09 | | jsheedy: So many violent attempts to choose from, but they all seem to fail, so I'm going for 27. f5, exf5, 28. Bxf5, etc. If 27...e5?!, 28. fxg6, e4?, 29. g7+, Kg1, 30. Bxe4, Qxe4, 31. Rh3, pretty much forcing black to give up his queen to avoid Rh8+ followed by Qh6+ and mate. |
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| Aug-20-09 | | onesax: <David2009>, interesting little problem you posed there. I had a play around with that link, and I managed to "find" a draw by repetition - but I don't know if it really is a drawn position, or just Crafty unable to see progress :S After <27. Rxb7 Qxb7 28. Qh6 Rg8 29. Rf3 Qxf3> (this is me vs Crafty) 30. gxf3 Rc3 31. Be4 Rxa3 32. Kf1 Ra5 (threat Rh5) 33. Qh4 Ra2 34. f5 gxf 35. Bd3 and here Crafty takes the repetition Ra1-a2-a1-a2 while I just moved my king from f1 to f2 and back. Not really very instructive, but kinda fun :) |
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Aug-20-09
| | doubledrooks: I searched for ways to move the d3 bishop off the third rank to allow the b3 rook to swing over to h3. After considering 27. Be4, 27. Bxg6, and 27. Bb5, I found 27. Ba6, which wins. |
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| Aug-20-09 | | Patriot: I thought 27.Rxb7 Qxb7 28.Qh6 Rg8 29.Rf3 Rc1+ 30.Kf2 Qb2+ 31.Be2 was winning but as some pointed out 31...Rc3 refutes this. If each daily puzzle could be given a rating (like USCF or FIDE), I'm wondering what this would be? Any ideas <Life Master AJ>? |
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| Aug-20-09 | | onesax: <David2009>, another draw to your little puzzle, where white's back-rank threats *just* manage to stave off black's: <27. Rxb7 Qxb7 28. Qh6 Rg8 29. Rf3 Qxf3> 30. gxf3 Rc3 31. Be4 Rxa3 32. Kf2 Ra5 33. Qh4 Rh5 34. Qg3 a5 35. f5!? gxf 36. Qe5 Rhg5 37. f4 Rh5 38. Bc6 Rxh2+ 39. Kf1 d3 40. Bf3 Rc8 41. Kg1 Ra2 42. Bd1 Rg8+ 43. Kf1 Rh2 44. Bf3 and moves 40-44 are repeated over and over ... Position after 42. Bd1:
click for larger viewWhite's queen covers a1 and the c8-rook is tied to the defence of black's back rank. |
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| Aug-20-09 | | dzechiel: <Patriot: ... If each daily puzzle could be given a rating (like USCF or FIDE), I'm wondering what this would be?> You are not the first one to consider this issue.
User: agb2002 has put some effort into it, as well as
User: mostlyaveragejoe |
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| Aug-20-09 | | outplayer: I'm not improving or what? This week I haven't been able to solve a single puzzle until now. I suppose the levle of the puzzles is getting higher. |
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| Aug-20-09 | | wals: [Event "Sochi"]
[Site "Sochi"]
[Date "1986.??.??"]
[Round "8"]
[White "Svetozar Gligoric"]
[Black "Sveshnikov"]
[Result "1-0"]
[ECO "D47"]
[Annotator "Rybka 3 1-cpu (30m)"]
[PlyCount "113"]
D47: Semi-Slav: Meran System
1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c6 5. e3
Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. O-O b4 10. Ne4 Be7 11. a3 Nxe4 12.
Bxe4 Nf6 13. Bd3 bxa3 14. bxa3 O-O 15. Rb1 Qc7 16. e4 Rac8 17. e5 White
threatens to win material: e5xf6 Nd5 The knight likes it on d5 18. Ng5 Bxg5
(18... g6 19. Ne4 ) 19. Bxg5 c5 (19... Ba8 20. Qh5 h6 21. Rb3 ) 20. Qg4 (
20. Qh5 h6 ) 20... cxd4 (20... c4 21. Rfc1 Ba6 22. Be4 ) 21. Bf6 g6 22.
Qg5 Nxf6 23. exf6 Kh8 24. Rb3 (24. Rfc1 Qd7 25. Rxc8 Qxc8 (25... Rxc8 $2
26. Be4 d3 27. Qh6 )) 24... Qc6 25. f3 Ba6 ?? BLUNDER releasing the pressure
on the opponent (25... Qc7 this is the best way to fight back) 26.
f4 Bb7 27. Ba6 the logical end Ba8 (27... Bxa6 28. Qh6 Combination)
(27... Qxa6 28. Qh6 Combination) 28. Bxc8 (28. Rg3 d3 29. Qh6 Qc5+ 30.
Kh1 Bxg2+ 31. Rxg2 ) 28... Rxc8 29. Rfb1 d3 30. Rxd3 (30. Rb8 makes
sure everything is clear d2 31. Rxc8+ Qxc8 32. h4 ) 30... Qc2 (30... Kg8
31. Rbd1 h6 ) 31. Rdb3 Be4 (31... Qc7 32. f5 Deflection: g6 Qe5
) 32. Rb8 Qxb1+ 33. Rxb1 Bxb1 34. Qb5 Be4 (34... Ba2 doesn't do any good
35. Qd7 ) 35. Qd7 Rf8 36. Qxa7 h6 37. g4 (37. a4 makes it even easier
for White h5 ) 37... Kg8 (37... Kh7 doesn't get the bull off the ice 38.
a4 ) 38. Qe3 (38. a4 might be the shorter path Ra8 39. Qc5 Bb7 )
38... Bd5 39. f5 Kh7 (39... g5 does not help much 40. fxe6 Bxe6 41. a4 )
40. fxg6+ Kxg6 41. Qe5 (41. h4 seems even better Kh7 ) 41... Ra8 42. Qh5+
Kxf6 43. Qxh6+ Ke7 44. Qf4 Rc8 doesn't faze the opponent (44... Ke8 45.
Qg3 ) 45. g5 (45. h4 keeps an even firmer grip f5 ) 45... Rc4 46.
Qf6+ Ke8 (46... Kf8 47. Qh8+ Ke7 48. h3 ) 47. h3 Rc2 (47... Ra4 48. Qb2 Kf8
49. Kf2 ) 48. h4 Rg2+ (48... Ra2 doesn't change anything anymore 49. Qc3
Kf8 50. Kf1 ) 49. Kf1 Rg3 (49... Rh2 cannot change destiny 50. Qd4 )
50. Qh8+ Kd7 (50... Ke7 does not save the day 51. Qd4 Ke8 52. a4 Rf3+ 53. Ke1
) 51. a4 Ra3 (51... Rg4 doesn't improve anything 52. a5 Ra4 53. Qf8 Rf4+
54. Ke1 Re4+ 55. Kd2 Rd4+ 56. Ke2 Re4+ 57. Kd3 ) 52. Qf8 (52. Qd4 and
White can already relax Rf3+ 53. Ke1 Rh3 ) 52... Ra1+ (52... Rf3+ is not
much help 53. Ke2 Rf5 54. a5 ) 53. Kf2 e5 54. Qc5 Bh1 (54... Ke6
otherwise it's curtains at once 55. a5 Ra2+ 56. Ke3 Rh2 57. Qc8+ Ke7 ) 55.
Qxe5 Rxa4 (55... Rd1 56. h5 Rd5 57. Qf4 ) 56. h5 Bc6 (56... Ra2+ doesn't
get the cat off the tree 57. Kg1 Bb7 58. h6 ) 57. h6 (57. h6 Ra2+ 58. Kf1
) 1-0
The above may be of interest to those seeking help. |
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| Aug-20-09 | | minasina: Does 28....Qd5 work for 28.Rg3? |
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Aug-20-09
 | | Wayne Power: What's wrong with 17 Rf3 by White?
eg 17...Qc1+ 18 Bf1 Bxf3 19 Rxf3 d3 20 Qh6 Rg8 21 Qxh7+ Kxh7 22 Rh3#. |
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| Aug-20-09 | | WhiteRook48: 27 Rxb7 was my move. |
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| Aug-20-09 | | patzer2: For today's Thursday puzzle solution, Gilgoric's 27. Ba6! is a winning clearance move which creates a surprise double attack, threatening to win decisive material on the Queenside or mate on the Kingside. See the posts by <LifeMasterAJ> with Gilgoric's Informant analysis (page 2 of kibitzing) and <TheBish> (Page 1 of kibitzing) for a good detailed explanation and analysis. |
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| Aug-20-09 | | jheiner: 27.White to play.
White is a P down. Both sides have the light B's and heavy pieces. Black is threatening mate on g2 if the White Q moves off the g-file. The dark squares around the Black K are weak. Look for forcing combinations. Candidate moves: 27.Rxb7, 27.Bxg6
Keys ideas to this position
Rxb7 removes the mate threat, but White eventually needs the Rb3 rook to to attack the K along the 3rd rank. With the mate threat on g2, the White Q can't move off the g-file unless there are immediate checks.
Bxg6 is the destructive sacrifice. For Black, Rg8 buys time against several attacking ideas. I tried a LOT of combinations with Rxb7, Bxg6 candidates to try to get this to work. Won't post the many variations I tried but the main ideas are above. White is just one piece short each time of breaking through the castled K position. After a (much too) long time I was about to give up, then decided to treat this with no time limit. And still couldn't make it work. White just doesn't have enough firepower. Then I saw the h-pawn and thought...what if...
27.h4 Ba6!
27.Bxg6 (hxg6 28.Qh6+ Kg8 29.Qg7#) fxg6
28.h4...
Black can try to trade Q
28...Qd5 29.f5
28...Qxg2+! 29.Qxg2 Bxg2 30.Kxg2
So even the h-pawn idea fails because Black can force the Q trade. Now I was really stuck. Basically because Black always has the forced trade on g2 (along with a lot of other nasty counterplay) it just makes the puzzle wickedly hard. With that in mind, I circled back to the original idea of Rxb7. I think that considering the forced Q trade is key to this puzzle. 27.Rxb7 Qxb7
Now White has 28.h4, f5, Bxg6, Qh6
28.Qh6 Rg8 (most forcing line)
The possibility here of 29.Qxh7+ Kxh7 and some kind of Rh3# is most attractive. But White has given up that wonderful Rb3 to shut down the counterplay of the forced trade on g2. Is there ANY way to remove the mate threat on g2 other than Rxb7? Yes! And there it is finally. That was worth all the struggle. The missing candidate move. 27.Ba6!!
If Black trades 27...Qxg2+ 28.Qxg2 Bxg2 29.Kxg2 and White is up a piece for a pawn. But this is Blacks best try.
27...Bxa6 (or Qxa6)
28.Qh6 Rg8 29.Qxh7+ Kxh7 30.Rh3#
I'm sure that this is correct. Time to check the game and the kibitzing. Thanks for hanging in on this one, and as always hope the extra mental process helps others. |
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| Aug-20-09 | | talfan: I've got that, pretty beautiful deflection from black mating treat while clearing the third rank for the rook. |
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| Aug-20-09 | | patzer2: One interesting aspect of this game is the difference in the position at White's 25th and 27th turns. Don't have a Chess program handy today, but I'm assuming that the reason 25. Ba6 isn't as strong as 27. Ba6! is that after 25. Ba6 the reply 25...Qd5! defends the position. This is because the White Queen is unprotected and the threatened 28. Bxb7 is met with 28...QxQ  . On the other hand, after 27. Ba6! the reply 27...Qd5 is met with 28. Bxb7  , when Black is busted after 28...QxQ 29. f4xg5 . |
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| Aug-21-09 | | LIFE Master AJ: <Jimfromprovidence> Good stuff! Thanks for taking the time to so carefully post and explain it, step-by-step. |
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| Aug-22-09 | | onesax: <David 2009> <Or can anyone hold Crafty in this ending? http://www.chessvideos.tv/endgame-t...; I've done it! After much trial and error, the WIN after <27. Rxb7 Qxb7 28. Qh6 Rg8 29. Rf3 Qxf3> (against Crafty): 30. gxf3 Rc3 31. Be4 Rxa3 32. Kf2 Ra5 33. Qh4 Rh5 34. Qg3 a5 35. Kg2 Rb5 36. Kh3 a4 37. Qf2 a3 38. Qxd4 Rb3
click for larger view
(now Crafty gets lost for ideas while White marches his king up!)
39. Qa4 Rgb8 40. Kg4 Kg8 41. Kg5 Rc3 42. h4 Rd8 43. h5 Rdc8 44. hxg hxg
click for larger view
45. Bxg6! fxg6 46. Kxg6 R3c7 47. Qxa3 Rd7 48. Qa6 Rcd8 49. Qxe6+ Kf8
click for larger view
50. Qh3 Kg8 51. f7+ Rxf7 52. Qe6 and white wins a rook due to the pin (Crafty thinks his best here is Rd6 and immediately loses the rook) and white is then up Q+2P for R, which I found a little laborious but a simple win. |
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| Aug-31-09 | | LIFE Master AJ: <Onesax> Interesting analysis, but your link does not work. |
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| Sep-21-09 | | minasina: <LIFE Master AJ: <Onesax> Interesting analysis, but your link does not work.> That link doesn't work because it's not his link but a copied link from post sent by <David 2009>. The problem with copying ChessGames kibitzes is that if the URL is very long, it will be displayed truncated (with "..." at the end). If the link is original, clicking on the link will take you to correct address, but if you click on a copied truncated link that will take you nowhere. http://www.chessvideos.tv/endgame-t... |
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