RE: computer-go: Perl Module for next move.

["Grajdeanu, Adrian" <adrian.grajdeanu@xxxxxxx>]

Heikki, you mention the ko rule, the super-ko and 'others that can get more
complex'. I was wonderig what are the 'official' rules that govern human
tournaments?

The triple ko is illegal, right?
What would be an example of multi-stone repeating sequence? (Other then
triple ko)

Thanx.

> -----Original Message-----
> From: heikki@xxxxxxxxxxxxxxxxx [mailto:heikki@xxxxxxxxxxxxxxxxx]
> Sent: Tuesday, 05 June, 2001 17:28
> To: computer-go@xxxxxxxxxxxxxxxxx
> Subject: Re: computer-go: Perl Module for next move.
> 
> 
> On Tue, Jun 05, 2001 at 11:19:03PM +0200, Grajdeanu, Adrian wrote:
> 
> > Heikki, I don't need gnugo to enumerate all valid moves. 
> I've already got
> > that covered. Though one thing I missed was what you call a 
> super-ko. I
> > learned of it through experience and actually wanted to ask some go
> > authority. So to make sure I understand it right, the go 
> rule sais that no
> > position may be repeated, right?
> 
> This is one point where the rule sets differ. The main idea 
> is to prevent
> endless recapturing loops. Some rules ("japanese") require that before
> recapturing a ko, you need to play somewhere else. Other 
> rules ("super-ko")
> prohibit the creation of a position that has already occurred 
> in the game.
> Others can get more complex. For computer go, the super-ko 
> rule is easy to
> implement, and solves some pathological cases like triple kos and
> multi-stone repeating sequences.
>  
> > What happeds if GnuGo is asked to score a position where 
> human players
> > don't see the end? Is the resulting score a decent one? For 
> if it is, then
> > maybe I can use it.
> 
> It will give you a fairly good score, but not a perfect one. 
> It can even
> make mistakes in scoring finished games, but probably so 
> seldom as not to
> disturb your NN experiments.
>  
> > To be honest, I'm skeptical too. I just wish to run an 
> experiment, that's
> > all.
> 
> Like I said, best of luck. And keep us posted on your progress!
> 
> -Heikki
> 
> -- 
> Heikki Levanto  LSD - Levanto Software Development   <heikki@xxxxxxxxxxxxxxxxx>
>