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Jul-26-09
 | | Domdaniel: Interesting game, too. I often play the Wade Variation (...Qb6, ...Bd7, ...Bb5) as black; but Korchnoi, after feinting in that direction, transposed back to the mainline with ...Nc6. Maybe my familiarity with these advance French positions - and the attacking power of white's LSB, if not exchanged off - helped me to see what was going on. |
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| Jul-26-09 | | agb2002: Black is a pawn ahead and threatens to take White's DSB. However, his castle has a number of weaknesses and most of his forces are on the other side of the board. The obvious 24.Bxb4 Qxb4 25.Bd3 seems to improve Black's chances after 25... Qd2. Another idea was 24.Bh5 to give the queen access to the king's side but after 24... Rxd2 25.Bxf7+ Rxf7 (25... Rh7(8) 26.Qh5#) 26.Qh5 Be8 27.Ng5 Rxf1+ she is lost. Therefore, 24.Bd3:
A) 24... Rxd2 25.Qh5
A.1) 25... Rxd3 26.Ng5 R(a-e)8 27.Qxf7+ Kh8 28.Qh5+ Kg8 29.Qh7#. A.2) 25... g6 26.Bxg6 fxg6 27.Qxg6+ Kh8 28.Ng5 + -.
A.3) 25... f5 26.Ng5 R(a-e)8 27.Qf7+ Kh8 28.Rf4 + -.
A.4) 25... R(a-e)8 26.Qxf7+ Kh7(8) 27.Qh5+ Kg8 28.Qh7#. B) 24... Bxd2 is similar to A.
C) 24... f5 25.exf6
C.1) 25... B(R)x2 26.Bh7+
C.1.a) 26... Kf7 27.Qh5+ g6 28.Qxg6#.
C.1.b) 26... Kh8 27.Qh5 Rxf6 28.Bg6+ Kg8 29.Rxf6 gxf6 30.Qh7+ Kf8 31.Qf7#. C.1.c) 26... Kxh7 27.Qh5+ Kg8 28.Ng5 Rxf6 (28... R(a-e)8 29.Qh7+ Kf8 30.Qh8#) 29.Rxf6 gxf6 30.Qf7+ Kh8 31.Qh7#. C.2) 25... e5 26.Bh7+
C.2.a) 26... Kf7 27.Qh5+ Ke6 (27... g6 28.Bxg6+ and mate next) 28.Qxe5+ Kf7 29.Ng5#; C.2.b) 26... Kh8 27.Qh5 Rxf6 (27... Bg4 28.Qxg4 Rxf6 29.Bxb4) 28.Rxf6 Qxf6 (28... gxf6 29.Bg6+ and mate in two) 29.Ng5 Rxd2 (29... Bxd2 30.Rc8+ Bxc8+ 31.Qe8+ Qf8 32.Qxf8#; 29... g6 30.Bxg6+ Kg7(8) 31.Qh7+ Kf8 32.Bxb4+ Rxb4 33.Qxd7) 30.Nf7+ Qxf7 31.Qxf7 Kxh7 32.Qxd7 + -. C.2.c) 26... Kxh7 27.Qh5+ Kg8 28.f7+ Rxf7 29.Qxf7+ Kh7(8) 30.Bxb4 Qxb4 (30... Bxh3 31.Qh5+ Kg8 32.Rf8#) 31.Qxd7 Qd2 32.Qxd5 + -. D) 24... g6 25.Bxb4 followed by Qg4, Rf6, Ng5, Rcf1.
Not quite satisfied with line D but it's enough for me. |
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| Jul-26-09 | | wals: The following may help those seeking help.Event "Drammen International Chess Festival"]
[Site "Drammen NOR"]
[Date "2004.12.30"]
[Round "4"]
[White "Alexey Shirov"]
[Black "Viktor Korchnoi"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2726"]
[BlackElo "2601"]
[Annotator "Rybka 3 1-cpu (30m)"]
[PlyCount "49"]
{C02: French: Advance Variation 20. Nh3 (20. Rc1 Ra3 21. Bh5 Nc6 ) 20... Nc2 21. Bd2 Na3 ♗lack threatens to win material: ♘a3xb1 22. Rc1 Rb2 23. b4 (23. Bh5) 23... Bxb4 24.(+ 3.48 ) Bd3 g6 25. Qg4 1-0 |
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Jul-26-09
 | | sackman: I got this one, perhaps because like Domdaniel I play the French as black. Thank you to those of you who took the time to post such comprehensive analysis! Nice trap by Shirov but surprising that someone as experienced as Korchnoi did not "feel" that a kingside so devoid of pieces was not asking for trouble. |
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Jul-26-09
| | OBIT: <David2009>After 24. Bd3 Bb5 25. Bxb4 Rxb4 26. Bh7+ Kxh7 27. Qh5+ Kg8 28. Ng5 Bd3 29. Nxf7 Bf5! looks like the best defense to me. Then if 30. Rxf5 exf5 31. Ng5 Qh6 ("Hey, where did she come from?!") wins for Black. Or, 30. Ng5 Rb1 appears to hold; for example 31. Rxb1 (31. Rxf5?? Rxc1+) Nxb1 32. Rxf5 Rxf5 33. Qh7+ Kf8 34. Qh8+ Ke7 35. Qxg7+ Kd8 and Black squirms out. IMHO 29. Rxf7 is best, which I analyzed above. It looks like a forced mate to me. By the way, I think <gofer's> approach (omitting 25. Bxb4) also works, so long as he transposes back to this line at some point by playing Bxb4. In other words, playing Bxb4 right away isn't critical, but it has to be played eventually, else the Black bishop can help out in the defense. |
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| Jul-26-09 | | gofer: Apologies <OBIT> for not seeing the point of 24 ...Bd5. <David2009> thanks for putting me straight... So are there any obvious holes with the line as suggested? 24. Bd3 Bb5
25. Bh7+ Kxh7
26. Qh5+ Kg8
27. Ng5 Bd3
Well 28 Rxf7 seems to kill this pretty quickly! White is threatening 29 Rxf8+ Kxf8 30 Qf7# so black has one move to find an answer... 28 Rxf7 ...
28 ... Rxf7 29 Qxf7+ Kh8 30 Qe8+ mating
28 ... Qd8 29 Rxg7+ Kxg7 30 Nxe6+! Kg8 31 Qg4+! Kf7 (forced) 32 Nxd8+ 32 ... Ke7 33 Qe6+ Kxd8 34 Rc8#
32 ... Ke8 33 Qe6+ Be7 34 Nf7! Nc2/Rc2/Bc2(Rxf7 Rc8#) 35 Nd6+ Kd8 36 Qc8#
32 ... Rxd8 33 e6+
33 ... Ke7 34 Rc7+ Rd7 35 Rxd7+ Kf8 36 Qg7+ Ke8 37 Qf7# 33 ... Kf8 34 e7+ Kxe7 35 Rc7+ Rd7 36 Rxd7+ Kf8 37 Qg7+ Ke8 38 Qf7# 33 ... Ke8 34 Qg8 Ke7 35 Rc7+ Kd6 36 Qxd8+ Kxe6 37 Qe7+ Kf5 38 Qe5+ Kg6 39 Rg7+ Kh6 40 Qg5# 33 ... Kf6 34 Bxb4 Rxb4 35 Qxh4+ winning the rook...
:-) |
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| Jul-26-09 | | gofer: <OBIT> just read your earlier post, sorry about the duplicate and inferior analysis, you are right! After 32 Nxd8+ Rxd8, if I played 33 Bxb4 Rxb4 instead of 33 e6+, then 34 Rc7+ gives mate as you say and is definitely more correct! :-) |
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Jul-26-09
| | OBIT: In your analysis, after 32. Nxd8+, I'm just playing 32...Rxd8. Then if 33. Rc7+, Black has 33...Be7 - that's the reason to get rid of this bishop earlier. (There may still be a win here - I haven't looked at this position too carefully - but an earlier bishop exchange seems to simplify matters.) * * * * *
Ah, I see you beat me to the response! :) |
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| Jul-26-09 | | BOSTER: Hello,everybody!
Chessgames.com Stuff thanks for creating this wonderful site , for great opportunity to gain deeper insight into chess.
I hope to catch here our thoughts how we find out the puzzle's solution.
About today's puzzle.
Most black forces are on Queen's side , they can not reach very fast own "fortress", which the pawn's structure is destroyed.
First idea is to attack h7 square, which starts an attack against the abandoned black King.
24. Bd3 if Rxd2 or Bxd2
25. Bh7+ Kxh7
26. Qh5+ Kg8
27. Ng5 and white wins.
I did not count all variations with g6 or other defense, but it is obvious that all white pieces,including Rc1 can take part in the battle against unprotected black King. |
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| Jul-27-09 | | TheBish: Shirov vs Korchnoi, 2004 White to play (24.?) "Insane"
With all but one of Black's pieces on the kingside, the only candidate move I came up with was one that threatened a quick mate. 24. Bd3!! ignores the attack on the d2 bishop, since 24...Rxd2 25. Bh7+ (decoy to gain a tempo) Kxh7 (or 25...Kh8 26. Qh5 Rc8 27. Bg6+ Kg8 28. Qh7+ Kf8 29. Rxf7+ Ke8 30. Qg8+ Bf8 31. Qxf8#) 26. Qh5+ Kg8 27. Ng5 Rc8 28. Qxf7+ Kh8 29. Qh5+ Kg8 30. Qh7 mate. Black's best defense is either 24...g6 or 24...f5, but White has a strong attack in either case. A) 24...g6 25. Qg6 Be8 (Black can't stand 25...Rxd2 26. Bxg6 fxg6 27. Qxg6+ Kh8 28. Ng5 and mate follows shortly) 26. Bxb4 and now: A1) 26...Qxb4 27. Rf6 Kg7 (or 27...Qe7 28. Rcf1 followed by 29. Bxg6) 28. Rc7! threatening 29. Qxg6+, and if 28...Kg8 30. Bxg6 fxg6 31. Rxg6+ mates. A2) 26...Rxb4 27. Rc8!, with the threat of 28. Rxe8 Rxe8 29. Bxg6, breaking through. If 27...Rb1+ 28. Ng1! Qb3 29. Bxg6 fxg6 30. Rxe8 Rxf6 31. exf6+ Kxf6 32. Rxe6+ mates quickly. B) 24...f5 25. exf6 opens more lines to the king, e.g. 25...Rxd2 26. Qg4 Rf7 27. Bg6! and now: B1) 27...Rxf6 28. Rxf6 gxf6 29. Qh5 Kf8 30. Qh7 Be8 31. Qh8+ Ke7 32. Qxe8+ Kd6 33. Rc8 Rd1+ 34. Ng1 Qb5 35. Qf8+ Kd7 36. Qd8 mate. B2) 27...gxf6 28. Bxf7+ Kxf7 29. Rxf6+! Kxf6 30. Rf1+ Ke8 31. Qg8+ Ke7 32. Qf8 mate. B3) 27...Bf8 28. Qh5 and quick mate to follow. |
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| Jul-28-09 | | openingspecialist: <CG.com> my fritz10 database says this game finished a couple of moves later than shown in the game. It says the game continued:
25. ... Kg7 26. Bxb4 Qxb4 27. Nf4 1-0 |
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| Apr-30-17 | | Fish55: I agree with the 2009 commentators that it is not that difficult to spot 24.Bd3 with the idea of 24...Rxd2 (or 24...g6 25. Qg4) 25. Qh5, Rxd3 26.Ng5 with mate to follow. |
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| Apr-30-17 | | diagonalley: ok, so this was billed as "insane" (?!) ... ergo, i started looking for spectacular (if improbable) moves which could lead to extended complications... (sigh)... life's too short for that kind of exercise :-( |
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| Apr-30-17 | | Walter Glattke: The moon said 28.Ng5 is  but one can Play 28.Rxf8+ Bxf8 29.Ng5 mating, so
28.Ng5 get mate, too.
D)My Variation is
24.Bd3 g6 25.Qg4 Kg7 26.Bxb4 Qxb4 27.Ng5 Be8 28.Rc7 Qd2 29.Nxe6+ Kg8 30.Bxg6 Qxg2+ 31.Qxg2 Rxg2
32.Kxg2 fxe6 33.Bh7+ Kh8 34.Rxf8#
or 32.-fxg6 33.Rg7+ Kh8 34.Rxf8#
Thanks to the moon kibitzer and all
the others with their previous analyses. |
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Apr-30-17
 | | An Englishman: Good Evening: Checking the commentary, turns out that I also solved this puzzle back in 2009. Still an astounding resource for White. |
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| Apr-30-17 | | kungfufighter888: ok failed cant get the 1st white move |
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| Apr-30-17 | | Walter Glattke: I think, Chess Games will see
24.Rxf7 Rxf7 25.Bh5 Rxd2 26.Qg4 e.g.
26.-Qd8 27.Bg6 Nb5 28.Ng5 Rf5 29.Qh7+ Kf8 30.Nxe6, so white can "seinen Gegner
zurechtstellen", move the chin of the boxer in wishful position before the Uppercut. |
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| Apr-30-17 | | agb2002: Recycled. |
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| Apr-30-17 | | Big Pawn: Wow, I got this one pretty easily. Bd3 looks so natural and the Qg4 follow up too. Nice to get a Sunday puzzle once in a while. |
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| Apr-30-17 | | mel gibson: I didn't see this one.
The computer says:
24. Bd3 (24. Bd3 (♗e2-d3 g7-g6 ♗d2xb4
♕b6xb4 ♕d1-g4 ♕b4-d2 ♘h3-f4 ♘a3-c4 ♘f4xg6 ♕d2xg2+ ♕g4xg2 ♖b2xg2 ♘g6xf8
♔g8xf8 ♔h1xg2 ♘c4xe3+ ♔g2-h3 ♘e3xf1 ♗d3xf1 ♗d7-a4 ♔h3xh4 b7-b5 ♖c1-b1
♔f8-g7 ♗f1xb5 ♗a4-c2 ♖b1-g1+ ♔g7-h6 ♔h4-g4 ♗c2-g6 ♖g1-c1) +6.70/16 96) score for white +6.70 depth 16.
Black Correctly resigned at move 25 as
the computer says:
25. Qg4 Be8 (♗d7-e8 ♕g4xh4
♗b4-e7 ♕h4xe7 ♖b2-c2 ♗d2-b4 ♕b6xb4 ♕e7xb4 f7-f5 ♗d3xc2 ♘a3xc2 ♖c1xc2 ♗e8-c6
♘h3-f4 ♖f8-e8 ♘f4xg6 ♔g8-f7 ♘g6-f4 ♔f7-g8 ♖f1-a1 ♔g8-f7 ♖a1-a7 ♔f7-g8
♔h1-g1) -17.32/14 107
score for black -17.32 depth 14 |
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| Apr-30-17 | | patzer2: Not too difficult for a Sunday puzzle. With 24. Bd3 g6 25. Qg4 , the basic idea is position and aim your attacking weapons at the Black King and see if he can survive. Turns out the second player can't survive 24. Bd3 g6 25. Qg4 , as Black resigns in lieu of 25...Be8 26. Ng5 Kg7 27. Qxh4 Rh8 28. Rxf7+ Bxf7 29. Qf2 Be8 30. Qf6+ Kg8 31. Bxg6 Rh6 32. Bf7+ Kf8
33. Qxh6+ Ke7 34. Qf6+ Kd7 35. Bxe6+ Qxe6 36. Qxe6+ Kd8 37. Rc8# (Deep Fritz 15 @ 20 depth per move.) Earlier Black can improve over 21...Na3 with the more active 21... Bb5 when play might continue 22. Rf2 Bxe2 23. Rxe2 Qa6 24. Bc3 Nb4 25. Bxb4 Bxb4 26. Rc2 Rxc2 27. Qxc2 Qc6 28. Rc1 Rc8 29. Qxc6 bxc6 30. Rc2 Ra8  to = (-0.36 @ 22 depth, Deep Fritz 15) |
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| Apr-30-17 | | morfishine: <6...Bb5> is best, if one wants to solve the problem of Black's WSB Why else would one play <5...Bd7> in the first place ? To follow up by blocking it in again with <6...Nc6> ??? lol
***** |
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| Apr-30-17 | | leRevenant: I like <diagonalley:> 's comment. Yes, CG really wrong-footed us here, with a touch of instantaneous as opposed to drawn out insanity. |
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| Apr-30-17 | | King.Arthur.Brazil: Friends, everytime is more uneasy to me to visit our Chess forum due to my own obligations, that includes my family -and now rarely I have time to sit and study a game. Today was one of this rare occasions where I see the position, didn't see any move better than simple Bd3. Pick the move and the reply was g6 and I chose Qg4 immediately without any deep thinking, naturally. Then when I see that again this is the move and had no black reply, that I understand what I had done. I'm happy to find the answer of this game so quickly. |
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Apr-30-17
| | ajk68: Nice pickup by white to see that Bxb4 removes a critical defender. A subtle imbalance with huge tactical implications. |
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