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

Author: Gian-Carlo Pascutto

Date: 00:38:03 05/05/01

Go up one level in this thread


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.

Not found before Diep crashed (at ply 11)

--
GCP



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