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Subject: Re: Nice position.

Author: Bob Durrett

Date: 09:59:10 10/22/02

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What if Black does not recapture on b5?

Bob D.


On October 22, 2002 at 12:47:28, Dann Corbit wrote:

>On October 22, 2002 at 00:26:02, Slater Wold wrote:
>
>>[D]r3nrk1/1bq2pp1/p1npp2p/1p5P/4PP2/PNNB2Q1/1PP5/2KR2R1 w - - 0 19
>>
>>
>>Can anyone find 19. Bxb5?
>
>Ruffian likes f5:
>
>E:\programme\winboard\ruffian>ruffian -h 300M -t 9999 -T bxb5.epd
>Hash size 314572800
>Ruffian 1.0.1
>feature done=0
>Loading configuration: ruffian.cfg
>Warning: EGTB_HASH_SIZE changed, default=1048576, newvalue=8388608
>Logfile: Mon Oct 21 23:04:32 2002
>Total hash size 300M
>Initializing tablebases: /programme/winboard/nalimov
>Testing bxb5.epd, 9999 seconds, extra ply 3
>Testing: test 1   Solution: Qg6
>  r3nrk1/1bq2pp1/p1npp2p/1p5P/4PP2/PNNB2Q1/1PP5/2KR2R1 w - -
>  Depth   Time  Score    Best line
>   8/22   1.18  -0.12    f5 exf5 exf5 Qe7 Qf4 Kh8 Nd5 Qe5 Qf3
>   8-->   1.35  -0.12    f5 exf5 exf5 Qe7 Qf4 Kh8 Nd5 Qe5 Qf3
>   9/26   3.74  -0.11    f5 Qe7 fxe6 Qxe6 Nd5 Rc8 Nb6 Rd8 Nd5 Rc8
>   9-->   4.23  -0.11    f5 Qe7 fxe6 Qxe6 Nd5 Rc8 Nb6 Rd8 Nd5 Rc8
>  10/29   9.34   0.00    f5 Qe7 fxe6 Qxe6 Nd5 Rc8 Nb6 Rd8 Nd5 Rc8
>  10-->  11.01   0.00    f5 Qe7 fxe6 Qxe6 Nd5 Rc8 Nb6 Rd8 Nd5 Rc8
>  11/30  37.58   0.06    f5 exf5 exf5 f6 Nd5 Qf7 Nf4 Nc7 Be4 Rad8 Bxc6 Bxc6
>                         Ne6
>  11-->  38.60   0.06    f5 exf5 exf5 f6 Nd5 Qf7 Nf4 Nc7 Be4 Rad8 Bxc6 Bxc6
>                         Ne6
>  12/33   1:08   0.03    f5 Qe7 Qe3 Qf6 Rdf1 Ne5 Na5 Bc8 fxe6 Qxe6 Nd5 f5
>                         Be2 fxe4
>  12-->   1:12   0.03    f5 Qe7 Qe3 Qf6 Rdf1 Ne5 Na5 Bc8 fxe6 Qxe6 Nd5 f5
>                         Be2 fxe4
>  13/37   2:46   0.18    f5 Qe7 Rdf1 exf5 exf5 f6 Nd5 Qf7 Nf4 Nc7 Ne6 Nxe6
>                         fxe6 Qe7
>  13-->   2:52   0.18    f5 Qe7 Rdf1 exf5 exf5 f6 Nd5 Qf7 Nf4 Nc7 Ne6 Nxe6
>                         fxe6 Qe7
>  14/39  12:18   0.16    f5 Qd8 Rdf1 exf5 exf5 f6 Qf4 Kh8 Rg6 Rf7 Rfg1 Nc7
>                         Qg3 Qd7 Qf4
>  14-->  13:03   0.16    f5 Qd8 Rdf1 exf5 exf5 f6 Qf4 Kh8 Rg6 Rf7 Rfg1 Nc7
>                         Qg3 Qd7 Qf4
>  15/42  32:02   0.26    f5 Ne5 f6 g5 hxg6 fxg6 Qh3 Nxf6 Qxh6 Qh7 Qe3 Nfg4
>                         Qb6 Nf2 Rd2 Nfxd3+ cxd3 Nf3
>  15-->  33:28   0.26    f5 Ne5 f6 g5 hxg6 fxg6 Qh3 Nxf6 Qxh6 Qh7 Qe3 Nfg4
>                         Qb6 Nf2 Rd2 Nfxd3+ cxd3 Nf3
>  16/44  66:23   0.21    f5 Qe7 Rdf1 f6 fxe6 Qxe6 Qe3 Kh8 Rg6 Rf7 Rfg1 Nc7
>                         Be2 Re8 Qg3 Qd7 Qf4
>  16-->  72:33   0.21    f5 Qe7 Rdf1 f6 fxe6 Qxe6 Qe3 Kh8 Rg6 Rf7 Rfg1 Nc7
>                         Be2 Re8 Qg3 Qd7 Qf4
>  17...  72:33   1/39    f5
>
>Time: 166:39, cpu 98.46%, nodes 1307455216, nps 130757
>Hash: 128M, used 100%, hits 22%
>EGTB: probs 0, hits 0
>
>Best move: f5 (0.21)  Not solved (0/1)
>
>Summery: 0/1



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