RE: [computer-go] citation

[David Weiss <dweiss51@xxxxxxxxx>]

Mark,

     Are you aware of Goliath actually getting
the wrong answer in a game because of this?  
Would an opponent who understood the problem
be able to exploit this in a real game?

--- Mark Boon <tesuji@xxxxxxxxxxxxxxxxx> wrote:
> Goliath does. It 'skips' the diagonal part of the
> ladder, saving on average
> 80% of the reading time. But this way it can
> theoretically get the wrong
> answer in some really obscure cases. This is a
> weakness I happily accept in
> favour of the considerable speed-up.
> 
>    Mark Boon
> 
> -----Original Message-----
> From: computer-go-bounces@xxxxxxxxxxxxxxxxx
> [mailto:computer-go-bounces@xxxxxxxxxxxxxxxxx]On
> Behalf Of Darren Cook
> Sent: Thursday, July 15, 2004 2:41
> To: evand@xxxxxxxxxxxxxxxxx; computer-go
> Subject: Re: [computer-go] citation
> 
> 
> > So, what exactly is wrong with using John's
> definition, and applying
> > the term "ladder" to it?  That seems the most
> natural thing to call
> > it, and also the most useful definition to attach
> to the term.
> 
> I've always referred to it as "2-lib tactical
> searching".
> 
> With the stricter ladder definition you could scan
> out along a diagonal to
> read the ladder. Or at least jump to the point where
> you have to read out
> something special.
> 
> Having said that I read ladders with general
> tactical search code - messing
> around with special code has never seemed worth it.
> Do any of the strong
> programs do special ladder handling?
> 
> Darren
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