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Subject: Re: Nolot 3,6,9

Author: Jeremiah Penery

Date: 23:23:41 01/18/00

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On January 18, 2000 at 12:58:36, Ernst A. Heinz wrote:

>On January 18, 2000 at 12:16:22, Bruce Moreland wrote:
>
>>On January 18, 2000 at 04:21:45, Dann Corbit wrote:
>>
>>>Has any computer ever solved any of them?
>>>
>>>If not, why not?
>>>
>>>Zugzwang?
>>>Positional?
>>>Too deep?
>>>or
>>>???
>>
>>Mine has been working on 9 for a couple of days.
>>
>>It has finished ply 17 and wants to play Nxh6, which it seems to thinks wins
>>three pawns for an exchange.
>
>"DarkThought" also switches to Nxh6 in iteration #16 when I had
>to stop it again ... :-(
>
>00:21:23 15.01 Rxc5 Bxc5 Rc1 Be7 Rxc6 a4 Qd2 h5 Ngh2 a3 =-0.09 #418436678
>01:23:01 16.01 Rxc5 Bxc5 Rc1 a4 Rxc5 a3 Bc1 Rfc8 =-0.39 #1620714992
>04:45:09 16.16 Nxh6 >=-0.38! #5580265080
>09:32:07 16.01 Nxh6 Rac8 Ng5 Bg6 h5 gxh6 hxg6 fxg6 Ne4 Nb3 =-0.23 #11162318919
>
>=Ernst=

My modified Crafty is finding Nxh6 also (sticks with it from 10 ply, 1:20).  I
don't really know what it's seeing, though.  The score looks pretty strange.
Here's the last output:

16   425:45   0.81   1. Nxh6 Bg6 2. Nxf7+ Rxf7 3. Ng5 Rxf4
                     4. gxf4 Rc8 5. h5 Be8 6. Qg4 Nd8 7.
                     Rd2 Bb5 8. Nh3 Kg8 9. h6

I think it's OK up until move 5.  Move 5 may not be optimal for either side, and
8. ...Kg8 is just bad.
Any suggestions on the first 8 ply of the PV?

Jeremiah



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