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Subject: Re: 0x88 findings

Author: Reinhard Scharnagl

Date: 10:00:22 02/22/06

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On February 22, 2006 at 12:39:19, Alessandro Scotti wrote:

>Delfi 4.6, perft(5) = 5.359 s on 3.2GHz P4!

>On February 22, 2006 at 11:40:11, Reinhard Scharnagl wrote:
>
>>Following position is recommended:
>>
>>FEN: r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 25
>>
>>Ply     Nodes     all (x)   (e.p.)   all (+)     (#)    Prom.     Cstl.   Sec.
>>------------------------------------------------------------------------------
>>1          48           8        0         0       0        0         2      0
>>2        2039         351        1         3       0        0        91      0
>>3       97862       17102       45       993       1        0      3162      0
>>4     4085603      757163     1929     25523      43    15172    128013  0.187
>>5   193690690    35043416    73365   3309887   30171     8392   4993637  9.515
>>6  8031647685  1558445089  3577504  92238050  360003 56627920 184513607  392.2
>>------------------------------------------------------------------------------

Hallo Alessandro,

how has it been calculated?

There are of course faster methods. Smirf also has one (with caching).
And do not forget, it costs time to analyse moves and to fill the statistic
using 64 Bit counters.

FEN: r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 25

  +-*--b--c--d--*--f--g--*-+ MS Vis.Studio C++ Vers. 13.10
8 |[r]:::   :::[k]:::   [r]| (Compilation: Feb 17 2006)
7 |[p]   [p][p][q][p][b]   |
6 |[b][n]   :::[p][n][p]:::| Perft Testseries
5 |:::   :::<P><N>   :::   | (With TT Caching 256.0 MB / 4-fold)
4 |   [p]   :::<P>:::   :::| TT Access Success 51.0%
3 |:::   <N>   :::<Q>:::[p]|
2 |<P><P><P><B><B><P><P><P>| Smirf Test No.: 01
1 |<R>   :::   <K>   :::<R>|
=>+-*--b--c--d--*--f--g--*-+ Break Time 10.0 Sec.

Ply     Nodes     all (x)     (ep)   all (+)     (#)     Prom.     Cstl.   Sec.
-------------------------------------------------------------------------------
1          48           8        0         0       0         0         2      0
2        2039         351        1         3       0         0        91      0
3       97862       17102       45       993       1         0      3162      0
4     4085603      757163     1929     25523      43     15172    128013  0.125
5   193690690    35043416    73365   3309887   30171      8392   4993637  3.797
6  8031647685  1558445089  3577504  92238050  360003  56627920 184513607  83.73
-------------------------------------------------------------------------------




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