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Subject: Re: Question regarding GS 2930 test suite position #13

Author: Miguel A. Ballicora

Date: 09:13:36 05/23/01

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On May 22, 2001 at 18:35:04, Chessfun wrote:

>On May 22, 2001 at 02:37:46, Uri Blass wrote:
>
>>On May 21, 2001 at 22:45:50, Chessfun wrote:
>>
>>>On May 21, 2001 at 13:06:51, Andreas Schwartmann wrote:
>>>
>>>>I received an e-mail today asking me for help on GS 2930 test suite position
>>>>#13. My chess abilities are not good enough, I am afraid, but what do you think
>>>>about this? Here comes the mail:
>>>>
>>>>Andreas,
>>>>
>>>>I have been using the GS 2930 test suite to estimate the rating for the
>>>>Deep Blue system.  This is for use in a paper we are preparing.  I
>>>>downloaded the test suite from your web site.  There are three problems
>>>>that the system does not solve in 20 minutes.  One of them in particular,
>>>>#13, is not solved even for very deep searches.  The given move is Bxg7,
>>>>but Deep Blue Jr. gives a different move that has a somewhat higher score
>>>>than Bxg7.  The PV follows.  Do you have any opinion on this?  Thank you.
>>>>
>>>>Regards,
>>>>
>>>>Murray
>>>>
>>>>Rh5 Qc2 Qe7 Qb2 Ne5 Rc1 g4 Rf1 Kf1 Qb1 Kg2 Qe4 Kh3 Qb1 Rf5 Qf1 Kh4 Qg2 h3
>>>>Qa8 Rf7 +1.49
>>>>
>>>>--
>>>>
>>>>Any comments?
>>>>Andreas
>>>
>>>Interesting. Just shows that Deep Blue Jr is still being worked on.
>>>As for the PV if after Bxg7 from the mainline;
>>>Kxg7, Ne5 Rfd8, Qh5 Bf6, Qg4+ Kf8, Nd7+ Rxd7, Rxd7 Qc6
>>>Black although down isn't quite out and I don't see much better
>>>for white.
>>>
>>>Gambit 2.0 also likes Rh5 and after looking at the line posted by
>>>Murray it seems to me this line is clearly won. I would like to see
>>>Deep Blue Jr's analysis of the Qa8 move as the reply Rf7 wins AFAIK.
>>>and Qe4 maybe would offer better resistance.

No!!
... Qe4/ Ng6!! +-

That is the real threat and that's why it plays Qa8.

Regards,
Miguel


>>>
>>>Amazing how Deep Blue Jr sees all that in 20 min especially move g4.
>>>Though I am curious about it's final PV?
>>
>>Are you sure that it can see it in 20 minutes?
>>I understood that #13 was not solved even after a very long search so it is
>>possible that the pv is based on more than 20 minutes.
>
>
>Naturally I have no way to be sure. But I would hope after long analysis
>that the move Qa8 wouldn't be there.
>
>Sarah.



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