I would add invasions.
This is especially obvious when the position cries for a san-san invasion.
Nakade may be a part of it.
But the biggest problem is that the path to life/ko is very narrow.
The defender has many useful moves and the invader has few.
So MCTS will falsely judge invadable areas to be safe.
Stefan
----- Original Message -----
From: Petri Pitkanen
To: computer-go
Sent: Tuesday, October 27, 2009 11:05 AM
Subject: [computer-go] MC hard positions for MCTS
Hello,
Are there more peculiar situation that will cause problems for MCTS apart
from the three I know.
1. Nakade (this is partuially solved in most of the programs)
2. Semeais
3. Double Ko.
Last one was new to me. See
http://files.gokgs.com/games/2009/10/26/ManyFaces-Hyoga.sgf
In that game manyfaces wastes ko-threats in hopeless ko in lower left corner.
And wins game by human weakness of pushing with stones taht are short of
liberties.
Is there any nice way to solve this or shouldd all of these solved in
expanding the node using "classical" go-AI-engine.
Petri
--
Petri Pitkänen
e-mail: [email protected]
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