[Pachi] Pachi became strongest Go program on desktop systems. Are there any prospects?
pasky at ucw.cz
Sun Sep 7 11:05:40 CEST 2014
Thanks for pinging me on IRC about replying to this. :-)
On Fri, Aug 08, 2014 at 06:55:11PM +0200, Stanisław Halik wrote:
> On 2014-08-08 17:53, Petr Baudis wrote:
> >>For analysis while You get fixes and strength enhancements it may be helpful to see played games from here: ..snip.. (most of them played with 2 minutes per move, 2 cores and 8 GB of memory for each program).
> >>You can compare how stronger became Pachi, for example, by sparring its versions with MoGo4.86 (./mogo --19 --time 120 --pondering 1 --nbThreads 2 --collectorLimitTreeSize 800000 --loadOB totalOB.ob). For example also, in these games Pachi compiled with: DOUBLE=1 in Makefile; spatial_hash_bits 30 in patternsp.h and used Patterns: gogod-handikgspachi-iter; was launched with: ./pachi -f book.dat -t 120 threads=2,max_tree_size=4096 (may be there are more strong launch variant for this amount of time, cores and memory?).
> > Hmm, any particular reason for setting DOUBLE=1 ? I think that will
> >just slow things down, it should make sense only for huge numbers of
N.B. it turns out that with these settings, the playout count actually
does reach one million, which is about where DOUBLE=1 might start making
> That is, will make locality worse?
Yes, and IIRC in some places our float ops gets vectorized and that
should go faster with half the bit size.
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