Re: [gnugo-devel] josekis

[Evan Berggren Daniel]

On Mon, 17 Mar 2003, Evan Berggren Daniel wrote:

> > gnugo played the `*' move. we really should do something about
> > this joseki variation. Evan?
>
> I'll look into it.  My intuition is to do two things:  make the pattern
> larger, and add a constraint that it not be playing in its own moyo, eg
> !omoyo(a), with a one or two points above the point *.  I'm reluctant to
> make the pattern larger, because the move makes (more) sense if you swap
> the colors of the stones above (the joseki choice wouldn't, but...)

How about this?  The danger is of course the push and cut, and I would be
reluctant to say that this constraint guarantees safety.  I think it will
be an improvement though.

Evan Daniel


Index: patterns/hoshi.sgf
===================================================================
RCS file: /cvsroot/gnugo/gnugo/patterns/hoshi.sgf,v
retrieving revision 1.21
diff -u -d -r1.21 hoshi.sgf
--- patterns/hoshi.sgf  17 Mar 2003 21:57:27 -0000      1.21
+++ patterns/hoshi.sgf  18 Mar 2003 00:56:06 -0000
@@ -217,7 +217,11 @@
 (;W[pg]MA[mi]C[U]
 (;B[of]MA[mh]C[U];C[#nobi]
 (;W[qe]MA[mi]C[U];C[#w crawls];B[qd]MA[mh]C[U]PL[W]
-(;W[qj]MA[nk]C[U];C[#standard joseki];B[nd]MA[mh]C[U])
+(;W[qj]MA[nk]C[U];C[#standard joseki];B[nd]
+C[U
+; !oterri(A)
+#overconcentrated in this case
+]MA[mk]LB[md:A])

 (;W[qh]MA[nk]C[S];C[#alternative joseki];B[nd]MA[mh]C[U
 ]PL[B]