Author: Daniel Shawul
Date: 03:23:33 11/28/03
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On November 28, 2003 at 06:17:48, Frank Phillips wrote: >On November 28, 2003 at 05:00:49, martin fierz wrote: > >>just a short question: >> >>if i rip assembler stuff like popcount and firstone from the crafty source, but >>the rest of my program is entirely different, am i doing something wrong? >> >>if i use the kogge-stone floodfill algorithms posted here by steffan westcott, >>am i doing something wrong? >> >>how much foreign code is allowed? >> >>cheers >> martin >> >>PS: i use a table-based popcount, not crafty's assembly code. i use a modified >>version of crafty's lastone. i don't use steffan's floodfill code, but i plan to >>give it a try. > > >This gets even murkier when you consider copying ideas (and pseudo code), even >if the implementing code is different. > >I would never have re-invented alpha beta, hash tables etc etc. > >I have also implemented (sometimes modified forms of) ideas discussed here, on >Bruce's web site, described in Bob's notes to Crafty and anything else I could >find. > >Eugene's endgame tablebase code is included directly. As is code from >elsewhere, such as the GNUchess/Crafty polling the input stuff in Linux, random >number code off the net etc. Polling etc might not affect my program's >performance at chess, but the endgame tables certainly do. > >I suggest that all chess programs are derivative to some extent; and that most >of us are travelling a well trodden path. > >The question I suppose is where the boundaries lie. wow... you said it all man!! > >Having to produce your code for inspection seems entirely reasonable. Hopefully >this would be required only if there are reasonable grounds for believing foul >play. ICGA have yet to reveal these reasons in the case of List – at least on >their web site, where I could not even find the letter referred to below. > >I wait for wiser heads than mine to rule on this one .... Bob, Bruce.
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