Author: Daniel Shawul
Date: 04:08:08 02/16/05
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On February 15, 2005 at 18:38:43, John Merlino wrote: Hello all, i think this thread is probably about DanChess. So i will propose this deal. If you form a group of inspecting people here,I will send my code. And those people will post their results here, so that this matter is settled. I would like also to know which things specifically are cloned. I will post any open source engine's code as my defense daniel >I'm not trying to start a brutally long thread here, but I'm just curious about >how people feel about a particularly touchy subject -- clones. What, in your >mind, would lead you to the conclusion that an engine is a clone? > >Let's forget trying to find ways to PROVE that a clone is a clone; I'm just >trying to define one. For the sake of argument, assume that the author of this >engine in question tells you exactly what he did and did not do, and you must >decide whether to call it a clone or not. > >Here are some hypothetical questions to start the debate: > >If the author took Crafty and completely rewrote the evaluation code and nothing >else, would it be a clone? > >How about if the author rewrote the evaluation code and search algorithm only, >but left the hashing code, et. al.? > >How about if the author rewrote everything EXCEPT for the evaluation? > >How about if the author rewrote everything EXCEPT for Crafty's evaluation of >passed pawns? > >I think you can see where I'm driving. Obviously, many engine authors have >studied Crafty and other engines whose authors have graciously provided their >source code. But, for an engine to not be considered a clone, does it have to be >absolutely 100% the work of the author? (Forget about Nalimov's EGTB probing >code and any other code that can be used with permission). > >Many thanks in advance for your thoughts, > >jm (who's just preparing for any eventuality during his upcoming stint as >moderator :-)
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