Author: Matthias Gemuh
Date: 02:50:28 02/29/04
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On February 29, 2004 at 04:07:18, David Mitchell wrote: >> >> >>You have just described my 3-year-old engine, except that mine can SEE. >>How I wish it could see some good moves. >> >>/Matthias > >Have you profiled your program, yet? That should give you some good suspects for >such criminal behavior! ;) > >When you step through it, slowly, do you notice calls to functions being >repeated unnecessarily? For instance, in my program, I have the first function >check that the game isn't over from the last move that was made. To do that, it >generates _all_ the moves for the next ply, and checks each move until it finds >the first legal move. > >Now that the game isn't over, it again generates all pseudo legal moves, >repeating the work it just did. Since it happens pretty fast, it wasn't real >easy to see that was happening at first. > >Before you get into issues of cache efficiency, etc., be sure to check out the >overall logic loops in the big picture. It's easy for a chess program to hide >their devious ways. :) > >dave Unfortunately I have no means to profile my unportable Borland C++ Builder code. It uses the Borland VCL (a component library). When I overcome my laziness some day, I will cast out VCL and produce naked profilable C/C++ code for MS Visual C++. /Matthias.
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