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Subject: Re: perft records

Author: Uri Blass

Date: 10:06:24 09/06/04

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On September 06, 2004 at 12:17:48, Reinhard Scharnagl wrote:

>On September 06, 2004 at 12:03:44, Uri Blass wrote:
>
>>On September 06, 2004 at 11:45:29, Reinhard Scharnagl wrote:
>>
>>>Uri,
>>>
>>>I have made a little additional test (without mate detecting):
>>>
>>>FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
>>>
>>>  +-*--b--c--d--*--f--g--*-+ MS Visual Studio C++ Version 13.10
>>>8 |[r][n][b][q][k][b][n][r]|
>>>7 |[p][p][p][p][p][p][p][p]| Perft Testseries
>>>6 |   :::   :::   :::   :::|
>>>5 |:::   :::   :::   :::   | (without caching)
>>>4 |   :::   :::   :::   :::|
>>>3 |:::   :::   :::   :::   | Test #:      00
>>>2 |<P><P><P><P><P><P><P><P>|
>>>1 |<R><N><B><Q><K><B><N><R>| Break Time 75.0 Sec.
>>>=>+-*--b--c--d--*--f--g--*-+
>>>
>>>Ply     Nodes    all (x)   (e.p.)    all (+)      (#)    Promot.    Castl. Sec.
>>>-------------------------------------------------------------------------------
>>>1          20          0        0          0        0          0         0    0
>>>2         400          0        0          0        0          0         0    0
>>>3        8902         34        0         12        0          0         0    0
>>>4      197281       1576        0        469        0          0         0    0
>>>5     4865609      82719      258      27351        0          0         0    0
>>>6   119060324    2812008     5248     809099        0          0         0    6
>>>7  3195901860  108329926   319617   33103848        0          0    883453  150
>>>-------------------------------------------------------------------------------
>>>
>>>It seems to be about 10% faster without checking for mates.
>>>
>>>Those 10% seem to be the prize if one wants to have also that information.
>>>
>>>Regards, Reinhard.
>
>>Thanks for this information
>>What is the prize for detecting checks?
>>
>>I have a legal move generator but I detect checks today only during make move
>>and not during move generation.
>>
>>Uri
>
>Hi Uri,
>
>The detecting of checks is so essentially integrated within my move generation,
>that it hardly could be switched off without rewriting the whole approach. Thus
>I cannot provide you with that requested value, sorry.
>
>But have a look at following statistics in calculating secure fields the king
>would be able to move on: [http://www.chessbox.de/Down/CRC_Test_01.txt]
>
>Reinhard.


I do not understand the meaning of the statistics in that link.

Uri

Uri



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