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Subject: Re: Albert Silver's position -=- Crafty 600 minutes.

Author: Albert Silver

Date: 09:05:17 03/06/02

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On March 05, 2002 at 23:46:50, Slater Wold wrote:

>[D]2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - -
>
>
>
>max threads set to 2
>hash table memory = 96M bytes.
>pawn hash table memory = 40M bytes.
>choose from 2 best moves.
>6 piece tablebase files found
>47681kb of RAM used for TB indices and decompression tables
>EGTB cache memory = 32M bytes.
>
>
>Crafty v18.13 (2 cpus)

>         (3)   19   598:08   0.93   1. Nf3 Bg4 2. Bd5 Nb8 3. c4 Qe7 4.
>                                    cxb5 axb5 5. h3 Bxf3 6. Qxf3 Bc5 7.
>                                    Bxc5 Qxc5 8. Rb1 b4 9. Qe3 Qxe3 10.
>                                    fxe3 Kg7 11. Rxb4 Rd8
>White(1): quit
>execution complete.
>
>
>55,626,400,000+ nodes.

Thanks for the interesting analysis. I ran Crafty very briefly on the position
after Nxg6 hxg6 Qh6 Be6 Rd3 Bc1! and saw that it gave a +1.80 (more or less)
score after 12 plies, so it obvioulsy isn't choosing Nf3 because it considers
Bc1 to be weaker. This probably means that it thinks Rd3 f5 is a valid defense,
which it isn't. If that's the case, I'm afraid Crafty bit the dust here too. On
the other hand I fed it to Fritz 7.0.0.6 for 6 hours and though it chose Nxg6 at
ply 17, it switched back to Nf3 after with a score a little under a pawn.

                                        Albert



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