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Subject: Re: LCT II at one billion nodes [with boo-boo

Author: Vincent Diepeveen

Date: 05:56:09 05/06/01

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On May 06, 2001 at 08:41:57, Vincent Diepeveen wrote:

>On May 05, 2001 at 03:38:03, Gian-Carlo Pascutto wrote:
>
>>On May 04, 2001 at 16:47:41, Dann Corbit wrote:
>>
>>Some analysis with a 'smarter' program:
>>
>>(beta of Diep 2)
>>
>>>First "oopsie":
>>>[D]r2qrnk1/pp3ppb/3b1n1p/1Pp1p3/2P1P2N/P5P1/1B1NQPBP/R4RK1 w - - acd 16; acn
>>>>913702630; acs 2000; bm Bh3; c0 "Polugaevsky - Unzicker, Kislovodsk 1972"; ce
>>>>-22; id "LCTII.POS.08"; pv Nf5 Ne6 Rad1 Nd4 Qd3 a6 Rfe1 axb5 Nxd6 Qxd6 cxb5
>>>>Qb6 Bf1 Qe6 Bg2 b6;
>>
>>Diep switches a few times between Bh3 and Nf5 and finally locks on to
>>it at ply 10.
>>
>>>Second "oopsie":
>>>[D]r3k2r/3bbp1p/p1nppp2/5P2/1p1NP3/5NP1/PPPK3P/3R1B1R b kq - acd 17; acn
>>>>1054450532; acs 2001; bm Bf8; c0 "Cucka - Jansa, Brno 1960"; ce 7; id
>>>>"LCTII.POS.10"; pv Nxd4 Nxd4 e5 Ne2 Rb8 Bg2 O-O b3 d5 exd5 Bxf5 Rhf1 Bg6 c4
>>>>bxc3+ Nxc3 Rfc8 Be4 Bh5 Rc1;
>>
>>Not found at ply 12 (when my patience ran out)
>>
>>>Third "oopsie":
>>>
>>>[D]3r2k1/pp2npp1/2rqp2p/8/3PQ3/1BR3P1/PP3P1P/3R2K1 b - - acd 14; acn 1147481346;
>>>>acs 2001; bm Rb6; c0 "Korchnoi - Karpov, Meran 1981"; ce -7; id "LCTII.POS.12";
>>>>pv a5 Rcd3 Qb4 a3 Qb5 d5 Nxd5 a4 Qc5 Bxd5 Rxd5 Rxd5 exd5 Rxd5 Qc1+ Kg2 Qxb2
>>>>Rxa5;
>>
>>Found at ply 10.
>>
>>>Fourth "oopsie":
>>>
>>>[D]r2qkb1r/1b3ppp/p3pn2/1p6/1n1P4/1BN2N2/PP2QPPP/R1BR2K1 w kq - acd 15; acn
>>>>982178114; acs 2001; bm d5; c0 "Spasski - Aftonomov, Leningrad 1949"; ce 129; id
>>>>"LCTII.POS.14"; pv Ne5 Nbd5 Nxb5 Be7 Nc3 O-O Nxd5 Nxd5 Bd2 Nf6 Bg5 Rc8 f3 h6
>>>>Bf4;
>>
>>I remember from manual analysis that this one is _real_ deep.

Note this position is not deep. a4 also wins bigtime. If bd6 after
a4 then still d5 wins for example. after a4 be7 then simply win
pawn on b5 and capture to a6 with it.

Best regards,
Vincent

>What beta do you talk about and what OS?
>
>I'm using win2000 always i hear all the time it crashes under
>win95 and sometimes even under win98 but i do not know why, it
>works perfect under win2000!
>
>>Not found before Diep crashed (at ply 11)
>>
>>--
>>GCP



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