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Subject: Re: Most brilliant novelty from cct7 Witchess-Arasan

Author: Arturo Ochoa

Date: 12:09:14 02/15/05

Go up one level in this thread

On February 15, 2005 at 14:18:16, Peter Berger wrote:

>On February 15, 2005 at 14:03:38, Arturo Ochoa wrote:
>>On February 15, 2005 at 09:29:58, Peter Berger wrote:
>>>On February 15, 2005 at 06:46:04, Arturo Ochoa wrote:
>>>>On February 15, 2005 at 02:56:54, Peter Berger wrote:
>>>>>On February 14, 2005 at 20:08:42, Arturo Ochoa wrote:
>>>>>>On February 14, 2005 at 19:54:03, Peter Berger wrote:
>>>>>>>Yes, you opposed this point of view multiple times before in discussions
>>>>>>>with Uri , but I think you never managed to score.
>>>>>>Of, I have managed to score several games during the year 2004.
>>>>>That's just a misunderstanding, because I worded badly :). My "scoring" only
>>>>>applied to the discussions, not to the quality of your work on the opening book.
>>>>>Btw - it's not trivial to think of a good and practical experiment to setup to
>>>>>show who is right.
>>>>Well, I have already done such an experiment and I know who will give the
>>>>easiest point. It is great because it will mean easy points.
>>>>However, I would not spend again valuable time repeating the same nonsense
>>>I think you can't really do such a test properly on your own. And it would be so
>>>extremely time-consuming to do in a realistic way, that I doubt anyone has ever
>>>really done it.
>>>You mentioned the major problem I see in another post, learning as done by a
>>>book author. This is a factor that has to be taken into account.
>>>If you take your opening book as prepared for some major event, it is probably
>>>nearly 100% deterministic at start of some round. If you run it against an
>>>automatically learning book in longer matches to get a measure for the quality
>>>of your work, it will get beaten badly. It might do well in the first few games,
>>>until the opponent finds some hole ( which in this case means just some line
>>>where it can beat "your" engine) - then it will repeat it in the following
>>How do you know that a book mine is so "deterministic"? How do you base your
>>facts in more suppositions without any proof? Well, I can argue that I have done
>>such tests but I wont  reveal how I do such tests.
>It was an assumption, because it is just reasonable to have a deterministic book
>at the start of a given game. Why throw dices if you have an idea which move is
>best in a given situation ? This doesn't mean that you don't have several
>alternatives prepared. Of course there are other ways to do things, no doubt.
>>>This is not a realistic test of what would happen in a tournament.
>>>But if you allow yourself to update the book during rounds, you have to allow
>>>your opponent to do the same. Else it is not realistic again. Even
>>>engines/authors who have a little book ,that is much shorter but every move
>>>checked, will react to what happens in the tournament games. E.g. Uri chose to
>>>just switch books after watching a movei opening he didn't like in cct7.
>>>The difference between a highly optimized book and one that just has few
>>>adaptions is mostly in quantity in this discussion. While the optimized book
>>>will usually have a few thousand manually entered lines the latter might have
>>>only sth up to 50 ( numbers arbitrary chosen). The question is if you can be
>>>sure that with the huge number of lines you don't add more garbage than quality
>>Well, As you said "usually" and  your book was one thousand lines book. My book
>>is bigger than only 1000 lines.
>>This is not a relevant question because I dont generate a random book. My book
>>has over 200000 lines added by hand. Sometimes, my decision about line has not
>>been convenient. Maybe, you choose arbitraly  your numbes. I dont know how you
>>od it and I am not interested in. My books are higly checked by hands.
>>Sometimes, I dont have enough time to test them with the engines and it possibly
>>means a bad result. But your question is not relevant of how I do my books.
>I think we are getting nowhere here. I wasn't trying to steal your ideas on how
>you do books or test them, but you obviously got this impression. This was meant
>to be a thought experiment - oh and yes, "mine" is bigger than 1000 too :)
>Be well

From all this brain storming, I can remark just one fact: Your performance in
CCC2004 was outstanding and nobody can deny that. :)

Again, my compliments. I would have liked to see a Crafty operated by you in


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