Bill Rogers wrote:To this I might add if one line of code in a chess program licensed under GPL is found to identical of open source free program then GPL license is null and void.
If the license is incompatible with the GPL, then probably. But if you indeed meant _free_, then the license probably is compatible with the GPL. Licenses that are incompatible with the GPL are ones that place restrictions on derivative works that are incompatible with the
copyleft inherent in the GPL.
All of the basic concepts of writhing a chess program have been open source and free for decaded now and any chess program who tries to use them in a copyright license like GPL is out and out thieft.
You can not copyright an idea, only an expression of an idea. Patents protect ideas. Copyrights protect the actual works.
You can not copyright someone elses code and has been made public.
That's true. But you can use it in a GPL project, unless it's incompatible with the GPL's copyleft.
I thing that most of the noise made here is by a bunch of jealous old and/or young men who do not have the capability to do any better. There moto it if you can beat them then yell 'CHEAT".
Dang. I thought you were going to be polite this time. If that's your feeling, fine. But I do not think the GPL means what you think it means.