Author: Albert Silver
Date: 07:55:20 03/08/02
Go up one level in this thread
On March 08, 2002 at 10:40:07, Uri Blass wrote:
>On March 08, 2002 at 09:31:00, Albert Silver wrote:
>
>>On March 07, 2002 at 23:35:13, Uri Blass wrote:
>>
>>>On March 07, 2002 at 16:30:38, Albert Silver wrote:
>>>
>>>>>I think that Bxb3 is a wrong move in that line and 7...Rxf5 can prolong the
>>>>>struggle.
>>>>
>>>>Did you consider 8.Be3?
>>>>
>>>
>>>Yes maybe I did not analyze it enough but I still think that Rxf5 can prolong
>>>the struggle
>>>
>>>8.Be3 Qd7 9.Qh8+ Ke7 10.Bg5+ Rxg5 11.Rh7+ Kd6 12.Rxd7+ Kxd7 13.Bxe6+ Kxe6
>>>14.Qc8+ seems to be the best line here.
>>
>>Yes, white wins the black bishop and the material balance ends up being queen +
>>pawn against rook and knight after 14.Qc8+ Kd5 15.Qg8+ Kc5 16.Qf8+ Kb6 17.Qxa3.
>>Black's pieces are poorly coordinated as the knight can't easily control both
>>wings, and white should not have much trouble creating another passed pawn on
>>the kingside to win it. I see very little trouble here and no hope for black.
>>Again, a few sample moves could go 17...Rg4 18.Qd6 a5 19.Qe6 followed by g4 and
>>h4. At least with Bc1 the pieces remain on the board so black can still hope
>>white will lack technique, but the truth is, even after Bc1 white will get a
>>free pawn AND have a much superior position.
>>
>
>The question is what happens more than 20 plies after Bc1
>
>Crafty's evaluation after 16...Kb6 is similiar to Crafty's evaluation after
>3...Bc1
>
>I do not agree with crafty evaluation.
>I agree it is more easy to win the game after 16...Kb6 but it does not mean that
>3...Bc1 does the game longer because even if the game after 3...Bc1 is 20 plies
>longer it means that 16...Kb6 makes the full game longer.
>
>From practical point of view f5 seems to be the best chance and not Bc1 because
>white may miss the right moves before 16...Kb6
In that I agree. While it is pretty much proven at this point that f5 loses
forcibly after a fairly long sequence, analyzing Bc1 for 20+ plies might yield
the same thing. More importantly is that White really has little thinking to do
in the Bc1 line to get his material. The material is handed to him right there
and then, whereas in the other lines, though Black loses more than a pawn, some
lines aren't easy to find and White could go wrong. Rg3 as shown, is not an easy
move to find at all, because the justification is only seen by comparing very
deep lines with Rg3 Rf6 Rh and Rh3 directly.
To be honest, I did not find Rg3 myself, it is GM analysis published in the book
by Chess Stars (a book I ordered from the Chess Assistant Store) entitled Boris
Spassky's 300 wins. It is a great book BTW, and contains a lot of biographical
material, contrary to other books in the series which only present crosstables
and commented games, and 300 deeply analyzed victories of Spassky. The games go
so far as to include Shaked-Spassky, 1998.
Albert
>
>Uri
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