Re: [computer-go] When is Pass the best move?

2006-10-24 Thread Thomas Wolf
On Tue, 24 Oct 2006, Heikki Levanto wrote: > On Tue, Oct 24, 2006 at 07:26:34PM +0100, Jacques Basaldúa wrote: > > BTW: In my over 50K master games collection I have only seen 2 games > > with a triple KO. (The whole collection was played out by GnuGo 3.6 > > level 10 to verify/compute the fina

Re: [computer-go] When is Pass the best move?

2006-10-24 Thread Heikki Levanto
On Tue, Oct 24, 2006 at 07:26:34PM +0100, Jacques Basaldúa wrote: > BTW: In my over 50K master games collection I have only seen 2 games > with a triple KO. (The whole collection was played out by GnuGo 3.6 > level 10 to verify/compute the final score.) And I have never seen > other superkos than

Re: [computer-go] When is Pass the best move?

2006-10-24 Thread Jacques Basaldúa
Don Dailey wrote: The only reason to have a KO rule is to prevent by force, long cycles. So I don't see a point in imposing more restrictive conditions than necessary. Talking about superko, I agree at 100%. John Tromp's arguments are sound and probably the best from the _ruleset's_ point of

Re: [computer-go] Positional Superko anomalies

2006-10-24 Thread Christoph Birk
On Tue, 24 Oct 2006, alain Baeckeroot wrote: Any ko fight where the only legal move is suicide a group or pass. It could be die instead of seki for example (which is pass-alive) Seki is NOT pass-alive. Christoph ___ computer-go mailing list computer

Re: [computer-go] Positional Superko anomalies

2006-10-24 Thread Erik van der Werf
On 10/24/06, alain Baeckeroot <[EMAIL PROTECTED]> wrote: Le mardi 24 octobre 2006 10:55, Erik van der Werf a écrit:> On 10/24/06, alain Baeckeroot <[EMAIL PROTECTED]> wrote:>> > > On Mon, 2006-10-23 at 09:41 -0400, Don Dailey wrote: > > > > When someone mentioned a position where a pass-alive group

Re: [computer-go] When is Pass the best move?

2006-10-24 Thread Heikki Levanto
On Mon, Oct 23, 2006 at 12:23:14PM -0400, Don Dailey wrote: > But now we have one itty bitty practical inconvenience. How to you > conduct tournaments and matches where games can last forever? > > Since GO currently has arbitrary KO rules for practical convenience, why > not introduce another ar

Re: [computer-go] When is Pass the best move?

2006-10-24 Thread Tom Cooper
Cool idea Dons! I think taking away the ordinary ko rule in this way would have too strong a distorting effect on the game. The player who was behind could win all ko fights, and eventually there would be a ko fight that neither could afford to lose. Too many games would be drawn. It would end

Re: [computer-go] Positional Superko anomalies

2006-10-24 Thread alain Baeckeroot
Le mardi 24 octobre 2006 10:55, Erik van der Werf a écrit : > On 10/24/06, alain Baeckeroot <[EMAIL PROTECTED]> wrote: > > > > On Mon, 2006-10-23 at 09:41 -0400, Don Dailey wrote: > > > > When someone mentioned a position where a pass-alive group should be > > > > sacrificed - I wondered if it was

Re: [computer-go] When is Pass the best move? Ko

2006-10-24 Thread Magnus Persson
Quoting alain Baeckeroot <[EMAIL PROTECTED]>: It seems this kind of strategic consideration/evaluation is not (yet) part of computer go (and as kyu player, its hardly getting into my game ;) I think the top programs on CGOS handle ko fights very well on 9x9, relative to their strength in gen

Re: [computer-go] When is Pass the best move? Ko

2006-10-24 Thread alain Baeckeroot
Le lundi 23 octobre 2006 22:12, Don Dailey a écrit : > I'm just looking for a way out of the KO ugliness as a mental exercise. arg , ko is not ugly :) A famous go proverb, you can find in the excellent book "go proverbs": "If you are afraid of ko, don't play go." And a strong pro (sorry i fo

Re: [computer-go] Positional Superko anomalies

2006-10-24 Thread Erik van der Werf
On 10/24/06, alain Baeckeroot <[EMAIL PROTECTED]> wrote: > On Mon, 2006-10-23 at 09:41 -0400, Don Dailey wrote:> > When someone mentioned a position where a pass-alive group should be> > sacrificed - I wondered if it was also due to PSK issues.> > This can also happen with normal rules, if one nee

Re: [computer-go] Positional Superko anomalies

2006-10-24 Thread alain Baeckeroot
Le lundi 23 octobre 2006 16:06, Don Dailey a écrit : > I don't want to beat this one to death - but a side effect I noticed of > positional superko is that having a move available can make the > difference between the life or death of a group on the other side of the > board - not connected in any