Author: Bas Hamstra
Date: 06:20:30 04/25/00
Go up one level in this thread
On April 25, 2000 at 07:24:38, Dan Newman wrote: >On April 25, 2000 at 06:50:18, Andrew Williams wrote: > >>On April 25, 2000 at 05:59:45, Bas Hamstra wrote: >> >>>On April 25, 2000 at 01:33:45, Tom Kerrigan wrote: >>> >>>>On April 25, 2000 at 01:32:48, Tom Kerrigan wrote: >>>> >>>>>On April 25, 2000 at 01:20:11, Bas Hamstra wrote: >>>>> >>>>>>(Currently I myself have started all over trying to make a really fast rotated >>>>>>BB program. Looks promising so far: make/unmake=2M/sec and movegeneration=12M >>>>>>moves/sec on a Celeron 466) >>>>> >>>>>My program does gen/make/unmake at 2M/sec, and just gen at ~10M/sec. >>>>> >>>>>I'm not using any sort of bitboards. >>>>> >>>>>Maybe something to consider... >>>>> >>>>>-Tom >>>> >>>>Whoops, forgot to mention that I have a Celeron/400. >>>>-Tom >>> >>>I am not very familiar with these type of statistics. What exactly does that >>>"gen/make/unmake" mean? Gen all moves and then making/unmaking each? But what >>>does it SAY..? I am afraid not much for my type of program. Here is why. >>> >>>- I have distinct functions gencaps() and gennoncaps() >>>- Profiler says caps() is called 10x as much called as noncaps() >>>- So 90% the time all the work of gen() is only to find a capture that gives a >>>cutoff. Regardless if you distinct them or not. >>> >>>So you can maybe extremely fast gen+make+unmake all moves. But what *I* want to >>>know is "how many times/sec" can I do a capgen(), since that has to be done >>>practically *every* node. >>> >>>And since it don't seem to matter a lot timewise if I generate 3 or 5 captures, >>>I simply measure the above TotalCapGens/sec. Maybe we can compare (same hardware >>>anyway): >>> >>>after e4 e5 Nf3 Nf6 Nc3 Nc6 Bc4 Bc5 >>> >>>I can do a CaptureGen() 800k times a second. I am interested in what others >>>have, especially 0x88 and non-rotated BB programs. >>> >>> >>>Regards, >>>Bas Hamstra. >> >>Hi >> >>The fen string for the position you describe is: >> >>r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq - 0 5 >> >>PostModernist is a 0x88 program, but it keeps up-to-date 32-bit attack >>records, which it uses for capture generation (amongst other things). PM >>can call generate_captures 510k times per second on a PIII-450 in this >>position. I'd be very interested in other programs' performances. >> >>Andrew > >My 0x88 program gets 830k capture generations/s (10M iterations) on a >Cel-400, but I'm not doing anything fancy, like attack records... > >-Dan. In fact this is a rather closed position, which favours 0x88. In this position my 0x88 version comes near to the BB version, ie 800k hardly sorted, on Celeron466. However then I tried a few more wac's, more "open" positions, were there were at least 5 possible captures. BB remained around 800k, but 0x88 went to 500k! (BTW Maybe the testposition is a bit too "closed" to be realistic, when you think of how the search operates, trying everything, hanging pieces everywhere, but a la...) Regards, Bas Hamstra.
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