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Re: [gnugo-devel] atari_atari:17

From: Evan Berggren Daniel
Subject: Re: [gnugo-devel] atari_atari:17
Date: Thu, 21 Nov 2002 16:02:45 -0500 (EST)

On Wed, 20 Nov 2002 address@hidden wrote:

> The position in atari_atari:17 fits this definition exactly.

So it does; apparently writing email while not entirely awake is a bad
idea.  So, in an attempt to extricate my foot, I've looked more closely at
atari_atari:17.  The problem is that the correct move is not considered.
Pattern A1 (try playing atari) is not classified as a sacrifice pattern,
and therefore does not match here.  This is probably good for performance,
but it means no pattern suggests the correct move.  The following pattern
fixes this.

I have not run complete regressions on it.


Evan Daniel

- new atari_atari pattern to shorten liberties

Index: patterns/aa_attackpats.db
RCS file: /cvsroot/gnugo/gnugo/patterns/aa_attackpats.db,v
retrieving revision 1.6
diff -u -r1.6 aa_attackpats.db
--- patterns/aa_attackpats.db   20 Oct 2002 10:40:45 -0000      1.6
+++ patterns/aa_attackpats.db   21 Nov 2002 20:59:38 -0000
@@ -234,4 +234,18 @@
 ;&& !oplay_connect(*,A,B)

+Pattern A15
+#evand new pattern 3.3.13
+;lib(A) == 2 && xlib(b) <= 2

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