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Subject: Re: Testposition - Clearing the Path

Author: Sune Larsson

Date: 11:16:56 03/01/01

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On March 01, 2001 at 13:03:02, Vincent Diepeveen wrote:

>On February 28, 2001 at 12:16:48, Ed Schröder wrote:
>
>>On February 28, 2001 at 08:51:47, Sune Larsson wrote:
>>
>>>
>>> [D]6k1/2p3np/1p1p2p1/3P4/1PPK1R2/6PB/7P/4r3 w - - 0 1
>>>
>>> This is Gelfer-Manievich, Jerusalem 1985. The theme is about
>>> central supremacy and active king in the endgame. The penetration
>>> of the king into the enemy camp is many times decisive and often worth
>>> a pawn. Gelfer bought a ticket for his king to the holy land, in a
>>> very instructive way:
>>>
>>> 1.Be6+! Nxe6 2.dxe6 Rxe6  [The sacrifice has cleared a path for the
>>> white king. 2.-c6 wouldn't do, owing to 3.b5!]
>>> 3.Kd5 Re7 4.Kc6 Kg7 5.Rf2 Re4 6.Rc2 Re7 7.b5 Kf6 8.Ra2 Re4 9.Kxc7 Rxc4+
>>> 10.Kxb6 d5 11.Ka7 d4 12.b6 Ke5 13.b7 Rb4 14.b8Q+ Rxb8 15.Kxb8 d3 16.Kc7 Ke4
>>> 17.Kd6 Ke3 18.Ke5 d2 19.Ra1 Ke2 59.Kf6 d1Q 60.Rxd1 Kxd1 61.Kg7  1-0
>
>Hello Sun,
>
>In your line black happily gives away c7 and all other pawns
>after which white wins easily. Of course computer doesn't fall for those
>human emotions.
>
>I don't need to mention that progs in general and diep especially
>do not like to give away a pawn to get a rook endgame.
>
>Rook endgames hard to judge anyway normally spoken, not to mention in
>this case.
>
>But what if black just runs with its king a bit and leaves the rook on e7?
>So exchanging a pawn on g5 that's it then threaten to capture the g pawn
>of white. If you exchange on c7 then i get a queen on h1 quick.

  Guess you're talking about the position after 8.Ra2. Instead of 8.-Re4
  you want to run a bit with your king - whereto? 8.-Kg5? or... sorry
  but I don't follow your line above. White goes for 9.Ra7 and eats the c prawn.


>
>Some more analysis would be interesting here to get indication what
>progs need to see in order to play Be6. Another idea from me here:
>how about first putting white rook somewhere else and THEN giving away d5
>pawn on e6 ?
>
>
>
>>> Test: The move 1.Be6+! should give a high +score for white. If a program
>>>       plays this move it recognizes the value of entering into the enemy
>>>       camp with the king. (Don't do that in the middlegame ;)
>>>
>>> Sune
>>
>>
>>No Be6+ after 10 minutes, I rest my case :(
>>
>>Ed



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