Author: Uri Blass
Date: 10:41:42 02/15/04
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On February 15, 2004 at 13:29:16, Dann Corbit wrote: >On February 15, 2004 at 13:24:54, Uri Blass wrote: > >>I understood from the winboard forum that Bob considers DanChess as a crafty >>clone and the question is what is the definition of a clone. >> >>I remember from slater's post in this forum that if most of the code is >>different you cannot win in court by complaining that it is a clone. >> >>I understood from Dann's post that only 30% of the code of DanChess is >>similiar(that does not mean the same as Crafty). >> >>Dann Corbit posted in the winboard forum the SEE function of Danchess that is >>similiar to Crafty. >>I wonder if it is really the main reason that Bob considers Danchess as a clone >>or only one of the reasons. > >There are more reasons that that one routine. Several routines are similar. He >also used some ideas from eval that are found only in crafty. For instance, he >had a stonewall detection. The only other program I ever saw with stonewall >detection was crafty. > >There is no standard for: >"This is a clone" >or >"This is not a clone" I believe that there are some standards. Suppose that a strong program with the same similiarity to Crafty becomes commercial and the author does not hide the similiarity and even share the similiar code that it has to crafty. I believe based on your descreption that if Hyatt go to court and sue the programmer then it is clear that the court is going to decide against him. > >It is clear to me that if you use ideas from someone else and they challenge you >as to cloning, then you may have a big problem to sort it out. I use alphabeta I use null move What other people can do against me? Therefore, if >someone has an idea you want to use, I think the only wise course is to send an >email and ask if you can use the idea. I think that it is absurd. Do I need to ask people if I am allowed to use null move pruning? What in case that I think independtly about an idea that other people use in their soutce code and I did not read the source code? Uri
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