Author: Daniel Clausen
Date: 05:24:26 03/27/02
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Hi On March 27, 2002 at 06:25:12, Arshad F. Syed wrote: >I plan to write a chess program. I was wondering if it would be worthwhile to >use the OOP approach. I have visited some sites of chess programs using OOP. The >general consensus is that OOP would cause a big hit on the NPS. Is it possible >with some really good programming to write an OOP based program that would have >the same NPS as the same program written without using OOP? > >Regards, >Arshad Syed I'm rewriting my engine at the moment in C++. (for various reasons, not only because of C++ itself) It surely depends on how much OO you want to use. Desigining an abstract class PieceA, deriving knight etc from PieceA etc probably is not a good way and will most likely decrease the performance a whole lot. I'm using some of the C++-features, just not all of them. Ie using a movelist with bounds-checking and stuff like that don't hurt the performance that much and is definitely worth it IMO. Of course if you want that 1.2373% of extra speed and don't care when your engine crashes whenever it stumbles over a position which has more than your <insert_your_favourite_number_here> legal moves, then C++ is not the way to go. ;) An additional benefit of using C++ is the compiler itself - typically it is more strict than the C-compiler. (I'm familiar with gcc/g++, I can't speak for VisualC++) Sargon (who would compile his engine with -ansi -pedantic -Wall, if only 'long long' would be part of ANSI :)
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