Re: Topics on influence

[David Fotland <fotland@xxxxxxxxxxxxxxx>(by way of Stuart Cracraft <cracraft@xxxxxxxxxxxxx>)]

Okay, let's say there is a corner like this:


    . . . . . . 
    . . . . . . 
    O O X X O .
    . X O O O . 
    . X X . . . 

What would a common influence function calculate for the
above (per square)?

With 3 tactically unsettled groups on the board the 
influence doesn't mean much.  My influence function
has high white influence everywhere, and black influence
very near 0 everywhere.  The white influence comes from
the 4 stone group.

The territory estimates, in 50ths of a point, with positive
better for white are:

6
11 8
17 13 8  6  9  8
26 19 15 12 13 13 8
39 30 29 20 21 19 13 8
0  0  0  0  11 27 17 12 7
0  0 -15-15 45 45 28 19 13 9  5  3  2  1  1
6  6  6  45 45 45 45 31 21 15 10 6  4  2  1
6  6  6  45 50 47 32 20 12 9  6  4  2  1

I only have one influence function at the moment that I
use for territory estimation.  You can look at the
handtalk web page for a description of his influence
function that he uses for connectivity.

David

At 09:02 PM 3/30/99 -0800, you wrote:
>Could you give examples of each for the example given,
>with corner in lower-left.
>
>Looking for three sample influence functions for the
>three purposes you mentioned.
>
>At 08:21 PM 3/30/99 -0800, David Fotland wrote:
>>
>>
>>I can't tell which is the corner :) 
>>
>>Influence functions can be used to help determine
>>connectivity, help tell if a group is surrounded, and
>>help find secure territory.  I suspect a different
>>function is ideal for each purpose.
>>
>>David
>>
>>At 07:31 AM 3/30/99 -0800, Stuart Cracraft wrote:
>>>
>>>Okay, let's say there is a corner like this:
>>>
>>>
>>>    . . . . . . 
>>>    . . . . . . 
>>>    O O X X O .
>>>    . X O O O . 
>>>    . X X . . . 
>>>
>>>What would a common influence function calculate for the
>>>above (per square)?
>>>
>>>I am interested particularly in the influence function that
>>>calculates the likelihood of a particular stone surviving.
>>>
>>>--Stuart
>>>
>>>At 09:45 PM 3/29/99 -0800, you wrote:
>>>>
>>>>
>>>>I just use it tell if groups are surrounded, and to estimate
>>>>the territory count and thickness.  I don't make high level
>>>>plans.  Just take it one move at a time.
>>>>
>>>>David
>>>>
>>>>
>>>>At 12:34 PM 3/30/99, Darren Cook wrote:
>>>>>>I like best the idea that the influnce of each color measures the
>>>>>>probability that a stone of that color can be placed there and live.
>>>>>
>>>>>This is a nice complement to the idea that territory is a point where a
>>>>>stone of the opposite colour will be dead.
>>>>>
>>>>>Once you've found influence what do you do with it? A human might use
>it to
>>>>>construct high level plans, but are computer programs really upto that
>kind
>>>>>of thing?
>>>>>
>>>>>Darren
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>>
>>
>
>