Hideki Kato wrote:
> | . . . . . . .
> | . # # . # . .
> | . O # . # . .
> | O O O . # # .
> | # # O O O # .
> | . # # . . . .
> ---------------
> Here, the problem is "filling own eye" at 1-1 for B, right?
Yes, that is the figure I meant, but it is not related with
nakade, only with filling your own eye.
> Self-atari (of a small group) is already allowed by almost all MCTS
> programs, I believe. I don't understand how this relates with seki.
The size of the group can be one criterion, but there are others.
The relation with seki is: if a group that lives in seki plays the
suicidal self-atari move, it dies and the playouts don't get the
evaluation ok. No matter if you avoid the move in the tree or not,
you must avoid it in the playouts or else the group dies. But that
is tricky, as you cannot simply forbid self atari moves because
some self-atari moves are tesuji. Therefore, there is "black magic"
to decide when and when not to play self atari. The size of the
group is important, but I guess strong programs must have found better
ideas.
Jacques.
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