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Subject: Re: an example how users - not programmers - use tests

Author: Mike Byrne

Date: 09:11:51 06/19/04

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On June 19, 2004 at 12:02:19, Steve Glanzfeld wrote:

>On June 19, 2004 at 11:47:03, Gian-Carlo Pascutto wrote:
>
>>On June 19, 2004 at 11:41:04, Steve Glanzfeld wrote:
>
>>>http://www.talkchess.com/forums/1/message.html?371210
>>>
>>>Doing something beats blah. :)
>>
>>I can understand some users might have some irresistable desire to
>>assign "ratings" via "testsets", but that does not change the fact that
>>this procedure is meaningless, unreliable, and a waste of time.
>
>Users are interested in the engine's performances in such tests, simply.
>Assingning ratings certainly isn't the main thing. Most often it is sufficient
>to count and compare the number of solutions.
>
>A practical example: A chessplayer has trouble in minor piece endings. He wants
>to analyse his games where such positions occured, with a chess program and
>maybe use that same program for training, to learn to handle these positions
>better. Now, he'd like to choose an engine which is especially strong in that
>type of positions, from several generally strong engines he has. So he compiles
>a test from typical minor piece ending positions (maybe from books, GM
>analysis...) where there is a specific difficult good move to be found, or a
>good looking but in fact bad move to be avoided (= solve). And then, he runs
>that test with the engines he has available, unsing roughly the time per
>position he intend to use in analysis. The engine which solves most often, is
>now his preferred analysis engine for minor piece endings.
>
>Now please don't tell me that wouldn't be ok...
>
>So what's all that "flawed" (etc.) blah??
>
>Steve

I think test positions are great.  They are a lot fun to see how engines stack
against each other on the same position or suite of positions.

But from my own experience in modifying Crafty , the best Crafty mods for test
positions are not the same mods for playing better chess.  However if I really
screw up Crafty from playing good chess - I can usually tell by runnning a test
suite. So I use it as a sanity check that I did not break Crafty.

From my perspscetive , the programs that do best in test positions are simply
the best programs that do best in test positions - nothing more , nothing less
and it can be a lot of fun and interesting to some people.  Other people may not
find it fun and interesting.



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