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Subject: Re: test position... avoid 30.Rb1...

Author: Richard Pijl

Date: 16:51:14 08/12/04

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On August 12, 2004 at 18:57:00, Sean Empey wrote:

>On August 12, 2004 at 13:43:12, Richard Pijl wrote:
>
>>On August 12, 2004 at 13:34:55, Dan Ellwein wrote:
>>
>>
>>>[D]1rr5/1b3p1k/4pb1p/8/Bq2pN2/4P3/R4PPP/2RQ2K1 w - - 0 30
>>>
>>> 30. Rb1?
>>
>>The Baron 1.4.0 needs less than 2 seconds on a P4-2.4 to avoid Rb1:
>>
>> ply       time        nodes   score  pv
>>  4( 8)&   0:00.05     11563   -0.02  Rc1xc8 Rb8xc8 Nf4-h5 Bf6-g5 Qd1-g4
>>  4( 8).   0:00.11     17798   -0.02  Rc1xc8 Rb8xc8 Nf4-h5 Bf6-g5 Qd1-g4
>>  5( 9)&   0:00.27     45114   -0.14  Ba4-c2 Qb4-c4 Ra2-a7 Bf6-b2 Ra7-a4
>>  5(10)&   0:00.33     55284   +0.16  Rc1-b1 Qb4-e7 Qd1-h5 Bb7-a6 Ba4-c2
>>  5(10).   0:00.38     65253   +0.16  Rc1-b1 Qb4-e7 Qd1-h5 Bb7-a6 Ba4-c2
>>  6(11)&   0:00.71    125731   -0.02  Rc1-b1 Qb4-a5 Ra2-d2 Rc8-c7 Rd2-d7 Rc7xd7
>>  6(12)&   0:01.86    288598   +0.04  Ba4-c2 Qb4-b5 Rc1-b1 Qb5-c4 Qd1-h5 Kh7-g8
>>  6(12).   0:02.19    355538   +0.04  Ba4-c2 Qb4-b5 Rc1-b1 Qb5-c4 Qd1-h5 Kh7-g8
>>  7(13)&   0:04.61    829896   +0.32  Ba4-c2 Kh7-g8 Rc1-b1 Qb4-c5 Nf4-h5 Bf6-e7
>>                                      Qd1-g4 Qc5-g5
>>  7(13).   0:05.11    938694   +0.32  Ba4-c2 Kh7-g8 Rc1-b1 Qb4-c5 Nf4-h5 Bf6-e7
>>                                      Qd1-g4 Qc5-g5
>>  8(16)&   0:13.07   2543381   +0.22  Ba4-c2 Rc8-c4 Qd1-h5 Rb8-f8 Rc1-d1 Qb4-c5
>>                                      Rd1-d7 Qc5xh5
>>  8(16).   0:15.43   3089680   +0.22  Ba4-c2 Rc8-c4 Qd1-h5 Rb8-f8 Rc1-d1 Qb4-c5
>>                                      Rd1-d7 Qc5xh5
>>  9(17)&   0:36.91   7385074   +0.22  Ba4-c2 Kh7-g8 Qd1-g4 Kg8-f8 Rc1-d1 Qb4-c4
>>                                      Bc2-b1 Rc8-d8 Ra2-d2 Rd8xd2
>>  9(17).   0:44.49   9124352   +0.22  Ba4-c2 Kh7-g8 Qd1-g4 Kg8-f8 Rc1-d1 Qb4-c4
>>                                      Bc2-b1 Rc8-d8 Ra2-d2 Rd8xd2
>
>
>Does it keep Bc2-b1 if you search longer? Storm also finds it fast but switches
>to RD1 farther into the search.
>

I'm afraid the Baron loses Bc2 too, and switches to Rb1 again. I didn't let it
run long enough to see whether it would get back to Bc2.
Richard.




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