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Subject: Re: Some Maastricht testpositions

Author: Robert Hyatt

Date: 20:50:28 07/15/02

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On July 15, 2002 at 15:44:55, Gian-Carlo Pascutto wrote:

>[D]r2qrbk1/5pp1/p1bp3p/1p2p3/1P2P1Q1/2P4P/P1B2PP1/R3RNK1 b - - 0 21
>
>Sjeng played d5, the same move was played by Ponomariov earlier
>this year in Linares against Adams. Alex Kure criticised it as being
>premature (citing Adams). Sjeng got into a worse position and Brutus
>slowly worked its way through a win.
>
>How long does your favorite program need to avoid it?

Crafty never considers d5.  It switches to a5 from Re6 and Qf6, at the
20 second mark and sticks with it until depth=12.  It changes to Qg5 at
depth=12 and it sticks with that thru depth 13.  Score = -.09



>
>[D]r2q1rk1/p2bbppp/1pn1p3/4P3/2pP1N2/2P5/P1B2PPP/1RBQ1RK1 w - - 0 15
>
>Brutus played Qh5 and went on to win after the double piece
>sacritice. I had a discussion with Tony Werten, who claimed
>you had to search really really deep to see the compensation.
>I think you just need good kingsafety :)
>
>How long to get Qh5, a winning score and see the double piece sac
>(Nxg6 Bxg6) and KEEP it?


Crafty likes Nh5 thru depth=14, score = +1.08...


>
>[D]r4rk1/5p1p/p1pb1n2/1p3bp1/3PR3/1BP2PPq/PP1NQ2P/R1B3K1 b - - 0 18
>
>Junior-Sjeng. Again Adams and Ponomariov in Linares 2002! Black
>must not accept the rook sacrifice. How long to avoid it?
>



Crafty would not be able to avoid this in any reasonable time control for
the event...







>[D]r4rk1/5p1p/p1pb1n2/1p3bp1/3PR3/1BP2PPq/PP1NQ2P/R1B3K1 b - - 0 18
>
>Sjeng played Qxg7 and Junior answered from book. I think I can
>omit the rest of the story.
>
>How long to avoid Qxg7?

I never get Qxg7 at all...  Crafty suggests Nxe4 instantly and
seems to stick with that thru at least depth=12...



>
>[D]2rq1rk1/pb1pn1pp/1p2p3/2pn1p2/3P2P1/P1PBPN1P/1P1NQP1R/1K1R4 b - - 0 15
>
>GM Alterman - Sjeng Anti-Human
>
>Black plays Nxc3!!
>
>Anyone else find this?
>
>--
>GCP


Crafty finds this quickly...  takes about 15 seconds on
my quad...  Score is not impressive however...  +.3 after 12
plies...  +.54 after 13...



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