[gnugo-devel] owl tuning

[Portela Fernand]

I found this one today in a twogtp game :

loadsgf ..\fight\alive.sgf
= white

showboard
=
   A B C D E F G H J K L M N O P Q R S T
19 . . . . . . . . . . . . . . . . . . . 19
18 . X . . . . . . . . . . . . . . X O X 18
17 X . . . . . . . . X . X . . . . X X O 17
16 O X X X . X . . . X X . . X X X O O O 16
15 O O O O X . X X . O X O . . . O . . . 15
14 . . O X X X O O X O X O O . O . O O . 14
13 . . . O O O O X X . O X . . . X . . . 13
12 . . . . . . O X . X X . X . X . X . . 12
11 . . . . O O O X . . . X O X X X . . O 11
10 . . O O X X X X . + X O O O O O X . . 10
 9 . . . O X . . . . . X O . X O X X . . 9
 8 . . . O X O . . . X O . . . O X . . . 8
 7 . . . O X X X X X O O . O . O X X X X 7
 6 . . . . O O O X O . . . . . O O X O X 6
 5 . . . . O X X X O O O O O . O X X O O 5
 4 . . O + O X O O O X X O X O O O O . O 4
 3 . . . . O O X O X X . X X O X O . . . 3
 2 . . O . O X X X . . . . X X X O O . . 2
 1 . . . O X X . . . . . . . . X O . . . 1
   A B C D E F G H J K L M N O P Q R S T

T17 is considered dead and the game finished like this.

Following patch is enough to fix this specific case. I guess, it's not
worth submitting a test case for it.

/nando

Index: patterns/owl_defendpats.db
===================================================================
RCS file: /cvsroot/gnugo/gnugo/patterns/owl_defendpats.db,v
retrieving revision 1.74
diff -u -r1.74 owl_defendpats.db
--- patterns/owl_defendpats.db  20 Nov 2002 20:42:24 -0000      1.74
+++ patterns/owl_defendpats.db  21 Nov 2002 21:43:16 -0000
@@ -795,10 +795,11 @@
 # tm added (3.1.14)
 # see trevor:401
 # Possible to sacrifice to gain tempo here.
+# nn Modified (3.3.13)
 
 O.X?     expand eye-space
 O.*.
-.x..
+.x.o
 ----
 
 :8,s,value(10)