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Re: [gnugo-devel] more strategic defense moves


From: Arend Bayer
Subject: Re: [gnugo-devel] more strategic defense moves
Date: Mon, 23 Aug 2004 14:26:06 +0200 (CEST)

Gunnar wrote:

> I've had another thought on the weakness problem. Currently a dragon
> can be declared very strong, i.e. weakness 0, either by having many
> eyes, much surrounding moyo, or high escape value. It seems to me that
> a dragon which only has a high escape value but is short on eyes and
> moyo very often is indeed quite weak and risks being isolated and cut
> off a few moves later.
> 
> What about something like this patch, or even more extreme
> modifications? (Untested, no idea what it does to regressions.)

>  static struct interpolation_data escape_route2weakness =
> -  { 5, 0.0, 25.0, {1.0, 0.6, 0.3, 0.1, 0.05, 0.0}};
> +  { 5, 0.0, 25.0, {1.0, 0.6, 0.3, 0.25, 0.2, 0.15}};

I doubt this gives much benefit. First, 25.0 is already a _very_ high
escape value (chosen so high exactly for the reasons you give).
Secondly, have 0.0 as escape weakness is not enough to get 0.0 weakness
overall, see crude_dragon_weakness().

Arend





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