Author: Christophe Theron
Date: 21:43:31 06/16/02
Go up one level in this thread
On June 16, 2002 at 19:21:27, Peter McKenzie wrote:
>On June 16, 2002 at 12:47:37, Christophe Theron wrote:
>
><snip>>
>>>>Just out of curiosity: what did you suspect???
>>>
>>>I suspected that Tiger would be a bit slow on this position (relative to the
>>>other strong programs that is). I figured its pruning would have some trouble
>>>with this particular case...
>>
>>
>>
>>That is maybe the case, yes. I don't care much about solving test suites faster.
>
>Right, although this position did occur in a game but it is still just a one off
>position.
>
>>
>>I know that if I wanted to I could. We all know that it is easy to extend more
>>aggressively on checks, responses to checks with few legal moves, recaptures and
>>so on.
>>
>>But that makes the program weaker overall.
>
>Sure, I understand this.
>
>>
>>What I like the most is to work in making the program stronger overall (say "in
>>real games"), and then notice that it gets better scores on test suites.
>
>agreed
>
>>
>>I remember it happened on the Louguet Chess Test 2 with version 12.0. I was
>>happy with that.
>>
>>There are lots of positions where Tiger does not perform well and has "tactical
>>holes". That's OK with me, because after all human players have exactly the same
>>problems, even the strongest. I still believe human players have a superior
>>search, and having such holes is a part of it.
>
>Yes these holes must be accepted to a certain extent. The trick of course is to
>plug the most important holes. Does this position show us a hole that is
>important? I'm not sure, but its worth a look I think.
But it's just one position.
I try to collect several positions around the same "theme" before trying to fix
a hole.
In other terms, I wait until a "hole" annoys me by repeatedly hurting my
program.
>I saw this position exposed a hole in my program, so I was curious what other
>programs had the same hole. I know Tiger prunes aggressively, thats why I asked
>about it.
If you see a program playing a huge tactical blunder for no reason, you can
sefely guess it is Tiger! :)
Christophe
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