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Subject: Re: Testposition - Tactics

Author: Vincent Diepeveen

Date: 01:38:17 07/12/01

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On July 11, 2001 at 20:18:05, James T. Walker wrote:

>On July 11, 2001 at 18:59:27, Vincent Diepeveen wrote:
>
>>On July 11, 2001 at 17:25:34, James T. Walker wrote:
>>
>>>Junior 7 likes Nxd5 after 5 seconds on my Athlon 900.  I holds it for over 3
>>>minutes with a score of less than 1.  Junior 7 likes Nxd5 cxd5 Rxd5 but then
>>>likes Nc4 Bc5 as a followup.  If I force feed it Rd8 instead of Nc4 the score
>>>goes slightly over +1.  So anyway Junior 7 would play this (Nxd5) move probably
>>>in blitz.
>>>Jim
>>
>>we need a mainline.
>>
>>Nxd5 can be played because of 2 reasons
>>  a) patzerscores
>>  b) it sees the whole trick
>>
>>in case of a it didn't solve it. In case of b it must show
>>at least next moves in mainline:
>>   nxd5 cd rd5 nc4 bf1!
>>
>>if other moves as bf1 shown then forget it.
>
>
>Hello Vincent,
>You may be right since you are a good chessplayer but my question is why do you
>insist on Bf1?  Since Bf1 was not played in the game and white won anyway why do

"bf1 was not played in the game" is not a valid argument. Opponent made
huge blunder as he played Rd8.

>you believe Bf1 is needed?  Also if I play the black moves from the Nxd5 move

Junior is PSQ please use a non preprocessor you will see score drop
to near zero at bigger depths when playing the line
  Nd5 cd Rd5 Nc4 Rf5

This line is very unclear and needs deep study to reveal whether
it's:
  a) won for black
  b) draw
  c) won for white

This where Nd5 cd Rd5 Nc4 Rf5 Bf1 is a clear win for white.

>on, Junior 7 plays the white side almost exactly as the game went with a minor
>transposition.  So it seems to me that if Junior 7 had been playing this game it
>would have won in the same way and without Bf1.  This does not seem like a
>patzer to me.  I know that humans also make the right move for the wrong reason
>quite often (even if they claim they didn't).  It just seems that in this case
>there is more than one way to win.
>Jim



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