Author: Larry Griffiths
Date: 18:50:52 01/30/01
Go up one level in this thread
On January 29, 2001 at 14:37:45, Dann Corbit wrote: >On January 29, 2001 at 09:08:59, José Carlos wrote: > >> As I started to rewrite my book management code, I decide to rewrite the whole >>engine in order to get more speed and being able to include new knowledge >>without getting too slow. >> With that idea, I tried changing my board[64] for a 0x88 move generator. Right >>now, I've only written the move generator but, when I tested it to measure if >>any improvement in speed, I got amazed. In this position: >> >>[D]rnbqkbnr/ppp2ppp/8/3pp3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq d6 0 3 >> >> that, if I'm not wrong, is call "Vincent's test" (because Vincent Diepeveen >>created it), where you have to generate all moves 2,000,000 times, I was getting >>about 9,500,000 moves per second (8.5 seconds for the whole test) in my AMD >>Athlon 550, with my old board[64]. >> Now, with 0x88 I'm getting about 14,500,000 mps (5.5 seconds), which is a huge >>improvement (I don't remember the exact numbers; it happend last night and I'm >>at work right now). >> My questions: >> - is my new number (14,500,000 moves per second) really fast for my hardware >>or I was really slow with my previous board[64]? >> - does it make sense such improvement in speed for that change? >> - could you please post your results in this test (and your hardware) for >>your programs, so that I can compare. >> >> Tonight I'll continue with my make/unmake functions, which were my bottleneck >>in Averno. I realized that the inCheck detection determined the speed of all the >>program. Is there any "smart" trick for make fast in check detection with 0x88? > >For something more interesting, try both Vincent's position and also this one: >8/8/p1r5/6k1/KP6/8/8/5R2 b - - Deeptrouble results for your postion, Dan... (I like this one a lot :) 1/30/2001 8:45:47 PM | ------------------------------------------------------ 1/30/2001 8:45:47 PM | Setting up the board using the following EPD string... 1/30/2001 8:45:47 PM | 1/30/2001 8:45:47 PM | 8/8/p1r5/6k1/KP6/8/8/5R2 b - - 1/30/2001 8:45:47 PM | 1/30/2001 8:45:47 PM | NO Castleing for either side 1/30/2001 8:45:54 PM | Bitboard Move Generations Made= 41,000,000 Bitboard Move Generations Per Second= 27,333,333 1/30/2001 8:46:18 PM | Makes/UnMakes Made= 41,000,000 Makes/UnMakes Per Second= 2,893,029 1/30/2001 8:46:36 PM | Generate/Makes/UnMakes Made= 41,000,000 Generate/Makes/UnMakes Per Second= 2,540,115 > >with both board formats.
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