[gnugo-devel] small avalanche mistake

[Evan Berggren Daniel]

In the game gnugo-3.4-nailer-200308310102.sgf, gnugo gets into trouble
with the small avalanche.  At move 17, black has just cut (the ladder is
favorable for W):

.......|7
.......|6
...OX..|5
..XOX..|4
..OXX..|3
.OXO...|2
.......|1
-------+
NOPQRST

At this point gnugo plays O3, followed by black R2, and then white P5.
None of this seems too horrible, until black continues with N4 and white
plays tenuki!  Black pulls his stone out, and W gets a horrible result,
with the lower group weak and losing the top group.

Evan Daniel