On Sun, Jun 27, 2010 at 06:31:15PM +0900, Darren Cook wrote:
> It is interesting that Crazystone, Zen (maybe) and Many Faces consider
> patterns on the whole board during playouts, while Mogo just considers
> them next to last move, and Fuego just next to the last 2 moves.
They consider patterns on the whole board, but also multiply values of
spatial patterns with other weights, among others "contiguity" with very
high value. So in practice, nearby pattern matches are very strongly
preferred anyway.
(Pachi considers patterns next to last move too. I have tried looking at
the last two moves, but it didn't work for me.)
> I guess moving to whole board patterns doesn't actually add much CPU,
> because they are only 3x3: a list of matching patterns can be
> maintained, and after each move only a few points need to be considered
> for new pattern matches.
Yes, but then you need to choose from a probability distribution over
all the moves, which actually does slow things down *quite* a lot.
But apparently the slowdown is worth it.
--
Petr "Pasky" Baudis
The true meaning of life is to plant a tree under whose shade
you will never sit.
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