Quoting Go Fast <[email protected]>:
I do not see any difficult in handling the second example.
Whenever the white tries to take out one liberty of the corner X group, the
2-lib check should kick in and immediately put the bottom O group into
atarai and it has no escape at all.
Look. If white takes one liberty away from X that group has 4
liberties. I do not undestand what you mean with a two liberty rule.
But I fear you give it magic properties it does not have and it sound
you made a tactical oversight from what you wrote.
The atari is a self atari (X must connect the two X stones to the 5
Xes) which means the two liberty white group has three liberties
effectively. And since X needs to play an approach move and fill in a
liberty X has effectively less liberties. This is a lot of
computations to do and if you do it everytime any group loses a
liberty you have a huge impact on the speed of the playouts.
Capturing 2-liberty groups everytime a 5-liberty neighbor loses a
liberty is also not a solution to the problem it will just make a lot
of unneccessary moves and bias the playout in new weird ways, because
most such situation are not a semeai with an eye and approach move.
If this was trivial Petr and I would not independently struggle with
the same problem.
Magnus
On Thu, Jan 13, 2011 at 8:46 AM, <[email protected]> wrote:
Quoting Petr Baudis <[email protected]>:
O O . . . .
O O X X X X
. X O O X .
. X O . O X
. X O O . X
Funny! This is exactly the kind of shape that I had to struggle with in
Valkyria and which I cover in my other reply.
Magnus
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