[gnugo-devel] Avalanche variation

[Evan Berggren Daniel]

In a game on nngs today, gnugo played the avalanche joseki, and the
opponent played a non-standard sequence.

|........
|........
|..OX....
|..XOO...
|...XX...
|........
|........
+--------

GNU Go continued with white C6.  Gunnar points out this is problematic
because B can atari at F4 and then F5, and the play B4 for a very good
result.

I think the correct continuation is W F4.  Is this correct?  I think that
this position is worth adding to the joseki database.

Thanks

Evan Daniel