Author: Uri Blass
Date: 18:38:52 12/12/05
Go up one level in this thread
On December 12, 2005 at 20:56:16, Dann Corbit wrote:
>On December 12, 2005 at 20:49:09, Uri Blass wrote:
>
>>On December 12, 2005 at 20:36:33, Dann Corbit wrote:
>>
>>>On December 12, 2005 at 20:07:08, Uri Blass wrote:
>>>
>>>>On December 12, 2005 at 19:30:50, stuart taylor wrote:
>>>>
>>>>>It's very interesting, and I don't think it ever happened before, that
>>>>>non-commercial programs came out, and became rulers over the commercial ones.
>>>>>And not only that, but SEVERAL have now done just that.
>>>>>
>>>>>How did it suddenly happen all at once?
>>>>>
>>>>>Perhaps there were a few very talented programmers who all thought they were
>>>>>going to outsmart the best, and then one released his, and then the other one
>>>>>broke his silence, and showed he could do the same (or better), and then they
>>>>>ALL went wild together? There are about atleast 4 programs which should make
>>>>>stunning headlines, BUT, they all have rivals!
>>>>>
>>>>>Or perhaps there was a good book that came out, for programming something
>>>>>special, and all those who saw it, went for it. But alas, they had company.
>>>>>
>>>>>How and why now?
>>>>
>>>>You can blame Fabien about it.
>>>>After he released fruit2.1 other learned.
>>>
>>>I doubt it (for the most part) {though it is also clear that he has advanced
>>>state of the art computer chess programs}.
>>>
>>>Zappa was world champion before any Fruit code became available (IIRC).
>>
>>No
>>
>>Fruit2.1 was avialbale before zappa became world champion.
>>
>>>Rybka seems rather different than Fruit.
>>>Similarly for Spike.
>>
>>I did not say that they are clones of fruit but only that programmers learned
>>from fruit.
>>
>>>
>>>I think that the situation is similar to what was going on in Newton's time
>>>frame.
>>>
>>>Newton, Leibnitz [and Pascal to some degree] simultaneously developed calculus.
>>>Hooke claimed also some of it to be his invention.
>>>
>>>But the precursors had built up to the point where *someone* was going to invent
>>>it eventually.
>>>
>>>I attribute the leaps and bounds improvments to the following:
>>>1. Lots of good, public, new ideas
>>>2. Some good private new ideas
>>>3. Some really good programmers getting interested in computer chess.
>>>
>>>Ten years from now, Fruit-level programs will be the norm and not the exception,
>>>even for a beginner. That is because information is advancing and smart people
>>>are adding their input. It's like a snowball rolling downhill. It can't help
>>>but get bigger.
>>>
>>>Fabien is responsible for some innovations. I guess that 2/3 of the chess
>>>programmers don't even understand them yet. At some point, it will become clear
>>>but by then there will be new fresh ideas. Probably just as important as having
>>>new ideas is implementing the ideas in a robust and correct manner. I think
>>>that is the most important lesson we can glean from Fabien's code.
>>>
>>>P.S.
>>>I predict he will have a very hard time writing a SMP version because of all the
>>>global variables.
>>
>>I do not know that fruit has global variables.
>>Unlike tscp that has one file of external variables fruit has many files of
>>external variables ane I know no variable that it external to all files.
>
>Lots and lots of them. They are scattered about here and there. Tell your
>compiler to make a map and you can see what they are.
I do not know how to tell my compiler to make a map but the question is what is
the definition of global variable.
It is clear that variable that can be used in every file is a global variable
but what about variable that can be used only in some files?
variables in fen.h can be used only in
board.cpp,fen.cpp,move_check.cpp move_legal.cpp protocol.cpp
They cannot be used in most files
Are there global variable or not global variables?
Uri
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.