RE: [gnugo-devel] SlugGo v.s. Many Faces

[David Fotland]

When you say you look ahead depth 16, what do you mean?  How do you select
the
move(s) to try?  How many moves do you try at each ply?

Impressive results.

Regards,

David Fotland

> -----Original Message-----
> From: address@hidden 
> [mailto:address@hidden 
> On Behalf Of David G Doshay
> Sent: Monday, August 23, 2004 9:02 PM
> To: GNU Go development; computer-go
> Subject: [gnugo-devel] SlugGo v.s. Many Faces
> 
> 
> Hello all,
> 
> Over the last year I have mentioned a few times that I am 
> working on a 
> Go project. We call our code SlugGo, partly because the 
> banana slug is 
> the mascot of UCSC where the work is being done, and partly 
> because the 
> program runs very slowly in spite of the fact that it is 
> spread over a 
> cluster of the latest G5 Macs.
> 
> SlugGo starts with GNU Go and adds parallel whole board lookahead. 
> SlugGo uses GNU Go to generate candidate moves from each player's 
> perspective and adds to the GNU Go move value additional values 
> depending upon the whole board positions at the end of the 
> lookahead to 
> determine which of the candidate moves to select. The primary reason 
> the code is so very slow is that we have found a lookahead 
> depth of 16 
> works very well, and it thus takes a bit more than 16 times 
> as long as 
> GNU Go to settle on its move.
> 
> We have been encouraged by our success against the GNU Go base code, 
> where we can win about 70% of the games when giving GNU Go a 5 stone 
> handicap, but were worried that our success was primarily the 
> result of 
> our correctly guessing the responses to our move choices because they 
> are all generated by GNU Go, that is to say that we know exactly how 
> our opponent thinks.
> 
> We are now confident that we are indeed much stronger than GNU Go 
> because of our results against Many Faces of Go.
> 
> In a 15 game set against Many faces, with Many Faces playing 
> Black and 
> no komi, the results are:
> 
> Black wins by 33
>       White wins by 126
>       White wins by 59
>       White wins by 67
> Black wins by 15
>       White wins by 73
>       White wins by 40
>       White wins by 17
>       White wins by 25
> A very complicated endgame board where perhaps White wins by 
> 76, but if 
> play were to resume again perhaps black could pull off a win by 
> something like 20. I have not worked this one out completely. 
> Black wins by 75
>       White wins by 58
>       White wins by 21
>       White wins by 125
> 
> The sgf files for these games can be downloaded from:
> 
>       http://hsrf-mc2.cse.ucsc.edu/~cowboy/mfgo_sluggo.tar.gz
> 
> We also have 10 more game results, also with MFG playing Black and no 
> komi:
> 
>       White wins by 24
>       White wins by 2
>       White wins by 42
>       White wins by 54
>       White wins by 41
>       White wins by 1
> Black wins by 4
>       White wins by 32
>       White wins by 53
> Black wins by 21
> 
> but we have not posted these sgf files yet.
> 
> So, SlugGo wins about 20 out of 25 from Many Faces. We will continue 
> this contest against Many Faces until we have 100 games.
> 
> We will continue to make our results available as we have them.
> 
> Cheers,
> David
> 
> 
> 
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