Author: Vincent Diepeveen
Date: 03:53:37 02/25/99
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On February 24, 1999 at 21:39:53, Larry Griffiths wrote: >On February 24, 1999 at 18:41:24, Vincent Diepeveen wrote: > >>On February 24, 1999 at 17:48:23, Larry Griffiths wrote: >> >>>Greetings CCC Chess Programmers! >>> >>>How long does it take your chess programs to go 10 full plys >>>from whites opening move of E2-E4? >> >>few seconds, depending upon selectivity it can take up to 1 minute. >> >Hi Vincent, > >What do you mean by selectivity? My program ran for 22 minutes >(Using a hash table and alpha-beta pruning with a killer heuristic). >I have used the CM6000 auto-analysis with 10 seconds per move and have >seen it go 10-14 plys deep at times. It sounds like your program is >also very fast. Do you mean that you go a few full plys and then >do secondary searches? > >It sounds like I would have to improve the speed of my program by >100 to 1000 times to catch up with you fellows. > >Larry :-) I get 20k nodes a second at a PII-450. But about getting deeply. a) improve move ordering b) use nullmove especially a is important when using b
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