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Subject: Material-only search from the starting position

Author: Andrew Williams

Date: 12:18:09 01/10/05


Hi,

Last Friday (7th January 2005) I started PM on a material-only search from the
starting position. This was in response to a request from Duncan Roberts:

http://www.talkchess.com/forums/2/message.html?151665

On Saturday 8th, I posted a progress report:

http://www.talkchess.com/forums/2/message.html?151865

I was hopeful that PM would finish 35 plies over the weekend, but it didn't
happen. When I got up this morning, there had been no progress since Saturday
afternoon and I didn't want to leave my PC on all day. PM had had 43 hours since
it finished ply 34, but although it was still burning CPU time, there was no
more output. The last I heard from PM was:

30=  +0.00   00:28:36.541087088735   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6
                                     5.b4 axb4 6.cxb4 e6 7.Bb2 Nf6
                                     8.b5 cxb5 9.axb5 Rxa1 10.Bxa1 g6
                                     11.Nc3 d6 12.Nf3
31>  +0.00   01:00:13.772083574223   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                     6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                     10.Bxa1 g6 11.Nc3 d6 12.Nf3 Qe7 13.d4
31<  +0.01   01:09:45.04-1811636011   1.a3
31=  +0.00   01:09:45.04-1811636011   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                      6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                      10.Bxa1 g6 11.Nc3 d6 12.Nf3 Qe7 13.d4
32>  +0.00   02:09:55.47 303672321   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                     6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                     10.Bxa1 g6 11.Nc3 d6 12.Nf3 Qe7 13.d4 Kd8
32<  +0.01   02:27:21.531056234340   1.a3
32=  +0.00   02:27:21.531056234340   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                     6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                     10.Bxa1 g6 11.Nc3 d6 12.Nf3 Qe7 13.d4 Kd8
33>  +0.00   05:02:57.082077668534   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                     6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                     10.Bxa1 g6 11.Nc3 d6 12.Nf3 e5 13.e3
33<  +0.01   05:41:54.93-634541739   1.a3
33=  +0.00   05:41:55.06-634541739   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                     6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                     10.Bxa1 g6 11.Nc3 d6 12.Nf3 e5 13.e3
34>  +0.00   11:36:50.42-1671302356  1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                     6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                     10.Bxa1 g6 11.Nc3 d6 12.Nf3 e5 13.e3 Ke7
                                     14.Qe2
34<  +0.01   13:09:24.491898767447   1.a3
34=  +0.00   13:09:24.491898767447   1.a3 a6 2.a4 a5 3.b3 b6 4.c3 c6 5.b4 axb4
                                     6.cxb4 e6 7.Bb2 Nf6 8.b5 cxb5 9.axb5 Rxa1
                                     10.Bxa1 g6 11.Nc3 d6 12.Nf3 e5 13.e3 Ke7
                                     14.Qe2

I'm posting this output purely for completeness. The node counts overflowed on
ply 31 and the PVs are probably pretty nonsensical.

Andrew




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