Ah. A "single path to victory" bottleneck. That makes it even worse than I
thought.
This is probably also the problem when mc bots judge an invadable to be
safe.
Stefan
One problem is approach moves. Say W has a group with 3 liberties, but
they
must be played in order (perhaps one is an eye, and one needs an approach
move). B has a group with 5 liberties, but they are all equivalent and
can
be filled in any order. W has only one random move that wins the semeai.
B
has 5 random moves that improve its chance to win the semeai. Most
playouts
will end with B winning this semeai even though W is one move ahead.
The other problem is local patterns. Often a 3x3 pattern will cause one
side to fill its own liberty.
David
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