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Subject: investigation finished.

Author: Vincent Diepeveen

Date: 16:12:02 09/22/03

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On September 22, 2003 at 12:50:34, Vincent Diepeveen wrote:

hi, though my computer is making extra hours nowadays analyzing openingpositions
(no not anything like CAP, just for some corr game of a friend who wants to win
BADLY as that matters for his career; which ain't easy against Svidler), i
managed to stop it shortly.

Without extensions the current version finds this in 4 minutes. Even though
that's based upon a few thousands of a pawn it's pretty interesting.

The move goes back later and then gets back 1 ply deeper again.

Best regards,
Vincent

>On September 21, 2003 at 05:58:50, emerson tan wrote:
>
>>On September 19, 2003 at 11:14:29, Vincent Diepeveen wrote:
>>
>>>Hello,
>>>
>>>I'm looking for positions to search very deep with a cpu or 500 which are
>>>interesting to search deep. Seemingly a whole machine must get reserved for DIEP
>>>world champs 2003. The NWO/NCF perhaps needs to pay for the cpu hours also
>>>during the night says SARA (there is 7 organisations involved and i have written
>>>at least 1 page for each processor to get it so i won't even start quoting all
>>>the organisations involved).
>>>
>>>Most jobs run like 2 weeks or so at say for example 32 processors, so all those
>>>jobs cannot get started trivially in the night.
>>>
>>>Anyway more negotiations will be there, because the world champs like this will
>>>cost 80000 cpu hours.
>>>
>>>This is all internal talks. In case any of such scenario happens or even between
>>>rounds when diep finishes sooner its games, there sometimes is a few hours left
>>>to run diep at 500 cpu's at for example 1 position each run.
>>>
>>>that's 250Ghz with around 200GB hashtables in total.
>>>
>>>So this allows some massive deep calculations. I'm looking for cool positions to
>>>try.
>>>
>>>Please don't mention the openings position, i'm already using that now and it
>>>isn't very interesting at all to search that one deep.
>>>
>>>feel free to email to me about this: diep@xs4all.nl
>>>
>>>Best regards,
>>>Vincent
>>
>>
>> I still havent seen a computer find the move here even if it takes several
>>days. The move is correct because white is already holpless in all variations. I
>>tried autoplaying with long time control, both computers cant understand black
>>is winning, but all the games black ended up winning.
>>
>>
>>[D]r3r1k1/pp1q1p2/2p2npb/PPPp1bnp/3PpN2/2N1P1PP/1R1B1PBK/3Q1R2 b - - 0 19
>>
>>Nikolic - Fischer 1968
>>
>>The key move is 19 - Bg4!!
>>
>>
>>The next Diagram was mentioned in Kasparov's My Predesessors, Kasparov said no
>>computer can find the move here.
>>
>>
>>[D]2r2rk1/pp3pp1/4bb1p/q2p1P1Q/3P4/2N5/PP4PP/1K1R1B1R b - - 0 17
>>
>>Pillsbury - Lasker 1896
>>
>>Key move 17 - Rxc3!!
>>
>>
>>The next one here involves early sacrifice in the opening, there's no forcing
>>line, just for iniative. This became the best played game in one of the  1990
>>Informator.
>>
>>
>>[D]rn1qk1nr/1b3ppp/p2b4/3p4/P1pP4/5N2/2PNBPPP/R1BQ1RK1 w kq - 0 11
>>
>>Geller - Dreev 1990
>>
>>Key move 11. Bxc4!!
>
>Gonna investigate this one. this pos looks very cool. complex middlegame
>with a lot of possibilities. It's the first pos from which i say: "YES this is
>interesting".
>
>>
>>Next one here people might already mentioned this to you, but just in case no
>>one mentioned it, I'll post it here because its too good to miss.
>>
>>[D]8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - 0 47
>>
>>Topalov - Shirov 1998
>>
>>Key move 47 - Bh3!!



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