Author: Christophe Theron
Date: 14:09:35 08/14/00
Go up one level in this thread
On August 14, 2000 at 15:40:30, Uri Blass wrote:
>On August 14, 2000 at 15:16:34, Christophe Theron wrote:
>
>>On August 14, 2000 at 15:00:26, Uri Blass wrote:
>>
>>>On August 14, 2000 at 14:53:31, Christophe Theron wrote:
>>>
>>>>On August 14, 2000 at 05:38:59, Alvaro Rodriguez wrote:
>>>>
>>>>>On August 14, 2000 at 02:47:26, Christophe Theron wrote:
>>>>>
>>>>>>On August 13, 2000 at 23:38:14, Peter Kappler wrote:
>>>>>>
>>>>>>>On August 13, 2000 at 23:04:06, robert blackwell wrote:
>>>>>>>
>>>>>>>>People should check out a position more carefully before claiming a move is bad.
>>>>>>>>bxa2 in the position given in the earlier post is the right move and it is the
>>>>>>>>move nd5 which loses as it breaks the pin on the d file preventing bxb3! any
>>>>>>>
>>>>>>>
>>>>>>>[D]3r1rk1/2p1Rppp/p4n2/1p1b4/3P4/3B3P/PPPN2P1/4R1K1 b - - 0 1
>>>>>>>
>>>>>>>I think you might need to follow your own advice, because after Bxa2 b3 Bxb3
>>>>>>>Nxb3 Black is lost.
>>>>>>
>>>>>>
>>>>>>
>>>>>>Actually the line is much more complicated than that.
>>>>>>
>>>>>>I believe that Bxa2 indeed loses, but playing b3 just after Bxa2 apparently does
>>>>>>not work. It is much much more complicated and deep.
>>>>>>
>>>>>>
>>>>>> Christophe
>>>>>
>>>>>I don´t think other moves are good here, only b3 is correct IMO
>>>>>Maybe you have seen something else?
>>>>>
>>>>>Regards,
>>>>>Alvaro
>>>>
>>>>
>>>>I have posted a 15 plies deep analysis in the other thread about this position.
>>>>
>>>>After b3 and 15 plies the black bishop was still there in good health and black
>>>>had still a good position. The only problem is the position of the bishop, but
>>>>this bishop also happens to be a pain for white as well...
>>>>
>>>>b3 is maybe correct, but that's not an obvioulsy winning move. White has still a
>>>>lot of work, and he has to be very careful.
>>>>
>>>>I don't like Bxa2, but it's not obviously losing as some would say. White has
>>>>some weak points to defend after that, and it is possible that the bishop can be
>>>>eventually exchanged against 3 pawns.
>>>>
>>>>Anyway, it's obvious that the bishop can be exchanged against 2 pawns, so it's
>>>>like losing one pawn overall for black if white plays perfectly.
>>>
>>>I agree that it is not clear if Bxa2 is a losing blunder but a bishop equals
>>>more than 3 pawns so losing a bishop for 2 pawns is worse than losing a pawn.
>>>
>>>Uri
>>
>>
>>But black gets a pawn majority on the queenside, and the a pawn is passed...
>>
>>
>> Christophe
>
>After Bxa2 b3 Bxb3 Nxb3 programs evaluates the position as clearly more than one
>pawn for black because inspite of the fact that black has a passed pawn on the
>queen side and pawn majority.
Note that I don't think Bxb3 is the right thing to do. Why do you want to give
the bishop right now? Holding the bishop is stronger, as white has to mobilize a
rook and a pawn (the c3 pawn) in order to keep the threat on the bishop.
Bxb3 is clearly losing, but I was not talking about that line.
>Junior5 evaluates the position as more than 1.3 pawns for white and Junior5.9 is
>even more optimistics because one of the changes between Junior5 and Junior5.9
>was a change in the value of the pawn(I have not Junior6 but I guess that the
>behaviour of it is similiar) and it evaluate the position after Bxa2 b3 Bxb3
>Nxb3 as more than 1.8 pawns for white.
I did not say that black has compensation for the material loss of the bishop
(if the bishop is really lost). I said that black has compensation for the bad
position of the bishop, and if it is really lost it is only a pawn down.
Christophe
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