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Very Hot Topic (More than 25 Replies) Colorado Defence 1.e4 Nc6 2.Nf3 f5!? (Read 29312 times)
Djy
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #27 - 05/10/11 at 13:11:59
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There's some variation on french's site 'Le chevalier d'odin'
But i 've found time to look at this!
http://nimzovinec.free.fr/spip.php?article37
  

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Michael Ayton
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #26 - 03/26/11 at 13:01:38
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Thanks Stefan -- I knew the point wasn't just some slow c3+Bc2 idea ...

In the 4 Bb5 line, I actually noticed last night that an engine was giving 6 ...Nf6 7 0-0 Nd7 -- but surely just 8 Bf4 is 'orrible for Black?!
  
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Stefan Buecker
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #25 - 03/26/11 at 12:06:20
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MarkG wrote on 03/24/11 at 18:08:18:
I was about to post that simple development (maybe just 7.Nc3) keeps a distinct edge for white when I saw Stefan's post. 7.Ba4! is indeed a nice idea.

7.Nc3 is basically the same as 7.Ba4, no? The point is 7...a6 8.Ba4 b5 9.Nxb5! axb5 10.Bxb5 etc. I only preferred the quiet 7.Ba4, because it is more amusing and stresses Black's problem: lack of moves. What Black wants to play is Qd6, but after 7.Ba4 Qd6 8.b3! or 7.Nc3 Qd6 8.Bf4 he is in trouble. Not so after, say, 7.Bg5 Qd6.

For example: 7.Ba4 a6 8.Nc3 Rb8 9.Bg5 Qd6 10.f4 b5 11.Bb3 White threatens a2-a4 (and much else), e.g. 11...Nxe5 12.fxe5 Qb6 13.0-0 c5 14.dxc5 Qxc5+ 15.Kh1 +/-.

In comparison, 4.Bb5 Qd6 5.d4 Bxf5 6.Ne5 Nf6, intending Nd7, seems less powerful. Note that after 7.b3, Black has 7...Qb4+, when it becomes clear that the bishop stands better on a4.
  
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Michael Ayton
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #24 - 03/26/11 at 10:14:37
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Well, my own 'stunning' motivation consisted of nothing more than my frail interest in the whole variation, I'm afraid, so that I didn't get round even to looking at the game till last night! I was v. tired then and didn't myself see the force of 7 Ba4!? -- maybe someone can help? But it still seems to me that 4 Bb5! is a much cleaner refutation of the Colorado (see the previous thread)! Unless someone can persuade me otherwise I'll continue to believe that this is a ropy line good for no more than an occasional outing, even though it spectacularly floored Mr S. Kasparov. (The thought of him complaining during the game of his opponent cheating conjures up quite a picture!)
  
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #23 - 03/25/11 at 21:14:31
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What I find stunning is that noone has questioned Stefan's 7.Ba4.
I see it is not a bad move, but can someone please explain to my why it deserves an exclamation mark?

In my eyes it retreats an unthreatened piece, and if the idea were to trade light-squared bishops with c3,Bc2 then why not Bd3 straight away?
  
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Michael Ayton
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #22 - 03/24/11 at 18:43:36
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This ancient thread may (or may not) be of interest:

http://www.chesspub.com/cgi-bin/yabb2/YaBB.pl?num=1129987764/0
  
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MarkG
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #21 - 03/24/11 at 18:08:18
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Stefan Buecker wrote on 03/24/11 at 17:59:37:
This game was analyzed in depth by Lev Gutman in Rochade 3 (2011) p. 11. Gutman mentions my refutation 7.Ba4! +/- (G. is cautious and writes "almost a refutation").


Presumably in deciding on 7.Qh5, S Kasparov thought that he was threatening g4 after Qe2. given that this doesn't work, Qh5 has to be a mistake that just helps the black dark-squared bishop get to where it wants to go anyway.

I was about to post that simple development (maybe just 7.Nc3) keeps a distinct edge for white when I saw Stefan's post. 7.Ba4! is indeed a nice idea.
  
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Stefan Buecker
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #20 - 03/24/11 at 17:59:37
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This game was analyzed in depth by Lev Gutman in Rochade 3 (2011) p. 11. Gutman mentions my refutation 7.Ba4! +/- (G. is cautious and writes "almost a refutation").
  
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #19 - 03/24/11 at 16:47:01
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In a recent game Black unleashed a queen sacrifice that won the brilliancy prize of the tournament and might refresh interest in the Colorado defense. It was reported in a German magazine that Kasparov accused his opponent of cheating during and after the game, but Schulze had analyzed this line until (position up to move 13 had been on the analysis board) shortly before the game which could be witnessed by other players. In fact, the queen sac had already been played twice in corr games 10 years before. Here is the game:

[Event "Bad Zwischenahn"]
[Site "?"]
[Date "2011.??.??"]
[Round "?"]
[White "Kasparov, Sergey"]
[Black "Schulze, Torben"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "2484"]
[BlackElo "2230"]
[PlyCount "38"]
[EventDate "2011.??.??"]
[EventType "swiss"]
[EventCountry "GER"]

1. e4 Nc6 2. Nf3 f5 3. exf5 d5 4. d4 Bxf5 5. Bb5 e6 6. Ne5 Nge7 7. Qh5+ g6 8.
Qe2 Bg7 9. Bg5 O-O 10. Bxc6 Nxc6 $3 11. Bxd8 Nxd4 12. Qd2 Nxc2+ 13. Ke2 Bxe5
14. Nc3 $2 Raxd8 $17 15. Rac1 d4 16. Nd1 Be4 17. Qg5 d3+ 18. Kf1 d2 19. Rb1 Bf4
0-1
  
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SutterCane
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #18 - 02/22/07 at 06:47:46
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I guess that I will find my name very often in this book  with the amazing COLORADO... Roll Eyes
  

I recognize terror as the finest emotion in a chessgame and so I will try to terrorize my opponent. But if I find that I cannot terrify, I will try to horrify, and if I find that I cannot horrify ...
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IM Christoph Wisnewski
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #17 - 02/22/07 at 06:11:16
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bagofknives wrote on 02/21/07 at 12:09:40:
Wow...now that's service!   I won't ask you to divulge your secrets here.  I will certainly be buying the book.  Right now the thing that concerns me in the 3...Ng4 line is that it looks like black could end up pretty often with doubled h and c pawns in that line.  That would give great open g and b files for the rooks but I wonder if it might be a liability if we get to an end game?


Siegbert Tarrasch once said: "Before the endgame, the Gods have placed the middlegame"  Wink

As for the release, I think the scheduled date was July 1st. From my side, there is no reason to delay a release at that time -  I finished my manuscript and hope that you will be satisfied with the content!
  

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realpolitik
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #16 - 02/22/07 at 02:35:35
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Quote:
Yes, I do.


Christoph any update on the release of this book. Along with many others I am eagerly awaiting the release of this title!
  
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #15 - 02/21/07 at 21:24:23
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Can't wait for that because i can't seem to get any where with 2..d6 at the moment.
I was playing 2..d5 but the lines where white plays the early Bb5 and no d4 are just too painful.
Is it still due in June??
  
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #14 - 02/21/07 at 12:09:40
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Quote:
Yes, I do.


Wow...now that's service!   I won't ask you to divulge your secrets here.  I will certainly be buying the book.  Right now the thing that concerns me in the 3...Ng4 line is that it looks like black could end up pretty often with doubled h and c pawns in that line.  That would give great open g and b files for the rooks but I wonder if it might be a liability if we get to an end game?

In the meantime (until the book comes out) I'm wondering about playing 2...d5?  When I've played the Center Counter in the past I've played the 2...Nf6 version, but I know enough about the 2...Qxd5 lines to know that your knight is not normally on c6 (usually c6 is played early and that helps provide a retreat route for the queen on a5).  However, if white plays Bb5 then it looks like the queen could eventually end up on h5 and that wouldn't be so different from my old Center Counter lines.
  
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IM Christoph Wisnewski
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Re: Colorado Defence 1.e4 Nc6 2.Nf3 f5!?
Reply #13 - 02/21/07 at 07:22:55
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Yes, I do.
  

"Chess you don't learn, chess you understand!" (V. Korchnoi)
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