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Subject: Re: About ordering moves

Author: Uri Blass

Date: 08:13:59 11/03/03

Go up one level in this thread


On November 03, 2003 at 10:20:36, José Carlos wrote:

>On November 03, 2003 at 10:08:08, Uri Blass wrote:
>
>>On November 03, 2003 at 09:36:57, Tord Romstad wrote:
>>
>>>On November 03, 2003 at 09:26:22, Mridul Muralidharan wrote:
>>>
>>>>Hi,
>>>>
>>>>  Recently I came to know that Vincent Diepeveen has been banned from CCC
>>>>without explaination.
>>>>Especially before , during and after an important event like world champs !
>>>>Is this true ? and if yes , why ?
>>>
>>>It's sad, but apparently true.  I recieved an e-mail from Vincent on Friday,
>>>where he explained that he had been banned without even recieving a warning
>>>in advance.
>>>
>>>I hope this is just some kind of misunderstanding or mistake by the moderators,
>>>and that Vincent will be back soon.
>>>
>>>Tord
>>
>>He was banned for 1 month because of his bad behaviour.
>>He attacked me in his posts and I complained about it.
>>
>>I did not save the relevant post and I do not remember the exact content but the
>>last case was when he said that I understand nothing about order of moves when I
>>only claimed that statistics about order of moves can be influenced by null move
>>pruning or by extensions so I do not consider it as important and I never
>>calculate the relevant statistics.
>>
>>I also explained later in another post why I think that null move pruning can
>>reduce the % of first fail high without changing the function of order of moves.
>
>
>  I've changed the subject because I want to speak about this now, which is very
>interesting for me.
>  I missed your previous post when you talked about null move and move ordering,
>and I'll search for it in the search engine.
>  I'm having a hard time trying to make null move work together with a high % of
>beta cutoffs at the first move. Unlike you, I find this statistic very useful
>because I can try several tricks to avoid non-productive null move searchs which
>will damage move ordering.

I think that the statistics that null move reduce the % of first high may be
because of the fact that null move save searching a lot of bad lines

I explained it in
http://www.talkchess.com/forums/1/message.html?324656

I think that order of moves is important and I know that I still need to improve
it but that kind of statistics is not going to help me.

The test if I improve my move ordering is simply by finding if I solve test
suites faster.

Uri



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