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Subject: Re: Experimentation with move ordering

Author: Robert Hyatt

Date: 11:30:28 11/28/00

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On November 28, 2000 at 14:17:41, Will Singleton wrote:

>I ran it out to 9 ply for my program and Macchess.  Move ordering is similiar to
>the usual, but I'm using PVS.  My searches do tend to blow up in the higher
>plys, for some unknown reason.  I'm going to try negascout just to see what
>happens.
>
>From this position:
>
>[D]rnbqkbnr/ppp2ppp/8/3pp3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
>
>Amateur
>ply   score     time     nodes      n/s    pv
>
>  3      90     0.08      3332    24960  Pxe5 Pxe4 Qxd8 Kxd8
>  4      90     0.17      8256    29100  Pxe5 Pxe4 Qxd8 Kxd8
>  5     125     0.33     20785    37740  Pxe5 Pxe4 Qxd8 Kxd8 Be3
>  6     118     1.20     66639    49920  Pxe5 Be6 Bb5 c6 Pxd5 Bxd5 Bf1
>  7      95     3.48    218850    57540  Pxe5 Pxe4 Qxd8 Kxd8 Bg5 f6 Pxf6 Nxf6
>  8     128     9.00    555919    61740  Pxe5 Pxe4 Qxd8 Kxd8 Bc4 Nc6 Bf4
>  9     110    42.00   2739007    65160  Pxe5 Be6 Qd3 Nc6 Qb5 Rb8 Nc3 Ne7 Nxd5
>Nxd5 Pxd5
>
>MacChess 4
>02/01|00:00:00|       296|  +22| dxe5 dxe4 Qxd8+ Kxd8 Bc4
>03/01|00:00:00|      1195|  +22| dxe5 dxe4 Qxd8+ Kxd8 Bc4
>04/01|00:00:00|      6651|  +22| dxe5 dxe4 Qxd8+ Kxd8 Bc4 Bb4+ Bd2
>05/01|00:00:00|     31790|  +25| dxe5 dxe4 Qxd8+ Kxd8 Bc4 Nd7 Bxf7 Nxe5
>06/01|00:00:00|    121312|  +32| dxe5 dxe4 Qxd8+ Kxd8 Bc4 Nd7 Bxf7 Nxe5 Bb3
>07/01|00:00:01|    422581|  +36| dxe5 dxe4 Qxd8+ Kxd8 Bc4 Nd7 Bf4 Nh6 Bxh6 gxh6
>Bxf7 Nxe5
>08/01|00:00:03|   1263936|  +31| dxe5 dxe4 Qxd8+ Kxd8 Bc4 Nc6 Bxf7 Nxe5 Bd5 Nf6
>Bg5
>09/01|00:00:13|   4478639|  +30| dxe5 dxe4 Qxd8+ Kxd8 Bc4 Nc6 Bxf7 Nxe5 Bd5 Nf6
>Bg5 Bb4+ Nd2


My numbers look like this:  (one cpu of course)

depth   nodes
  1       124
  2      1053
  3      6981
  4     16929
  5     50059
  6    149436
  7    451934
  8   1649304
  9   4307609
 10  14367818




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