Re: [gnugo-devel] more komoku josekis

[Evan Berggren Daniel]

On Sun, 23 Mar 2003, Arend Bayer wrote:

> On Mon, 17 Mar 2003, Evan Berggren Daniel wrote:
>
> > Some more komoku josekis.
> >
> > - Answers to low 1 space pincer after small knight's approach
> This is about the following situation:
>
> +Pattern JK262
> +
> +-----------+
> +...........|
> +...........|
> +....X.O....|
> +...ac...X..|
> +......O....|
> +.......X...|
> +......d....|
> +.......b...|
> +...........|
>
> (The patch adds variations following white a and white b.)
> I think both of these look a little dangerous for GNU Go to play. The
> concepts behind these are definitely beyond gnugo's scope for now. E.g.
> after white a, it tenukies against black c. Similarly after white b -
> black d.
>
> So I'd suggest to add these variations, but don't mark them as josekis for
> white for now. Then we know at least what to do when our opponent plays them.
> Later, once we have added more non-joseki continuations by black, or
> gnugo understands the position better, we can enable them.

The updated version below makes them not joseki.  I'll work on some
non-joseki variations, but because of the lack of good sgf diff tools I'd
like to get the patch in first.

>
> > - Continuations after large knight's approach
> > - Another avalanche continuation (non-joseki)
> These look both fine to me.
>
> Arend


Index: patterns/komoku.sgf
===================================================================
RCS file: /cvsroot/gnugo/gnugo/patterns/komoku.sgf,v
retrieving revision 1.10
diff -u -d -r1.10 komoku.sgf
--- patterns/komoku.sgf 16 Mar 2003 20:02:44 -0000      1.10
+++ patterns/komoku.sgf 23 Mar 2003 16:23:59 -0000
@@ -135,22 +135,27 @@
 ]MA[lg]
 (;B[mc]MA[lg]C[:-,shape(8)
 ])
+
 (;B[of]MA[lh];W[og]MA[lh];B[ng]MA[lh];W[oh]MA[li];B[ne]MA[li];W[pe]
 MA[li];B[lc]MA[ki])
 )
 )
+
 (;W[rf]C[0
 ]
 (;B[rd]MA[lh]C[J
 ])
+
 (;B[pe]MA[lh]C[0
 ])
 )
 )
+
 (;B[rd]MA[mg]C[0
-#not very good for b.])
+#not very good for b.];W[nd]MA[lg];B[re];W[qf]MA[lg])
 )
 )
+
 (;B[pf]MA[lh]
 (;W[qc]MA[lh]C[:-,shape(3)];B[rc]MA[lh];W[pc]MA[lh]C[U]
 (;B[re]MA[lh]C[:-,shape(8)]
@@ -263,8 +268,68 @@

 (;B[kc]MA[ig]C[:-,shape(8)])

-(;B[mc]MA[kf]LB[kc:A]C[;!xarea(A)];W[oe]MA[lg];B[pf]MA[lh];W[md]MA[kh]
-;B[ld];W[me]MA[kh];B[nc];W[od]MA[kg])
+(;B[mc]MA[kf]LB[kc:A]C[;!xarea(A)];W[oe]MA[lg];B[pf]MA[lh]
+(;W[md]MA[kh];B[ld];W[me]MA[kh];B[nc];W[od]MA[kg])
+
+(;W[ld];B[pc]MA[ih]
+(;W[ob]MA[ih];B[lc]MA[ih];W[kd]MA[hh];B[md]MA[hh];W[me]MA[hh];B[kc]
+MA[hh];W[jd]MA[hh]
+(;B[ic]MA[gh];W[nd]MA[gh])
+
+(;B[jc]MA[hh];W[of]MA[gi]
+(;B[pg]MA[gi];W[id]MA[gi];B[hc]MA[gi])
+
+(;B[id]MA[ii];W[pg]MA[ij];B[qg]MA[ij];W[pe]MA[ij];B[qf]MA[ij];W[qe]
+MA[ij];B[re]MA[ij];W[qh]MA[ij])
+)
+)
+
+(;W[pb]MA[ih];B[qb]MA[ih];W[pd]MA[ih];B[qc]MA[ih];W[md]MA[ih])
+)
+
+(;W[ph];B[of]MA[ij];W[md]MA[ij];B[lc]MA[ij];W[nf]MA[ij]
+(;B[ng]MA[ij];W[mf]MA[ij];B[oh]MA[ij]
+(;W[pj]MA[il];B[pc]MA[il];W[nc]MA[il];B[ic]MA[hk])
+
+(;W[ic]MA[gj])
+)
+
+(;B[oh]MA[ik]
+(;W[pj]MA[ik];B[ng]MA[ik];W[mf]MA[ik])
+
+(;W[pe]MA[ik];B[qe]MA[ik];W[og]MA[ik];B[ng]MA[ik];W[pg]MA[ik];B[qf]
+MA[ik];W[mf]MA[ik];B[pi]MA[ik];W[nh]MA[ik];B[oi]MA[ik];W[mg]MA[ik];
+B[qh]MA[ik];W[ic]MA[gj])
+)
+)
+)
+)
+
+(;W[nc]
+(;B[lc]MA[jf];W[qc]MA[jf]
+(;B[rc]C[0
+#too easy for w
+]MA[jf];W[pc]MA[jf];B[re]MA[jf];W[ne]MA[jf])
+
+(;B[pc]MA[jf];W[pd]MA[jf]
+(;B[qb]MA[jf];W[rc]MA[jf];B[od]MA[jf];W[pe]MA[jf];B[oc]MA[jf];W[rb]
+MA[jf];B[of]MA[jh];W[oe]MA[jh];B[ne]MA[jh];W[qe]MA[jh];B[nf]MA[jh])
+
+(;B[od]C[0
+#bad for b
+]MA[jf];W[pe]MA[jf];B[qb]MA[jf];W[oc]MA[jf];
+B[rc]MA[jf];W[pb]MA[jf];B[qc]MA[jf];W[ne]MA[jf])
+)
+)
+
+(;B[pc]MA[jf];W[kc]MA[jf])
+
+(;B[od]MA[jf];W[nd]MA[jf]
+(;B[oc]MA[jf];W[ne]MA[jf])
+
+(;B[ne]MA[jg];W[me]MA[jg];B[oc]MA[jg];W[ob]MA[jg];B[pb]MA[jg];W[nb]
+MA[jg];B[oe]MA[jg];W[mf]MA[jg])
+)
 )

 )