Re: [gnugo-devel] trevor_1_16.3 & trevor_1_16.4

[Trevor Morris]

>From the patch:
>>  #
>>  # where X can play above * and get miai between capturing * and
>>  # escaping through the gap towards the center.
>> +
>> +# tm modified (3.1.16)
>> +#   addresses above concern, a bit.
>>  
>> -O.X         third line kosumi
>> +???         third line kosumi
>> +O.X
>>  .*X
>>  ...
>>  ---
>>  
>>  :8,-,value(55)
>>  
>> +?C?
>> +OAX
>> +.*X
>> +...
>> +---
>> +
>> +; oplay_attack(*,A,*) && (owl_escape_value(C) > 0)
>> +
>
>Maybe I'm reading the patch wrong, but it seems like the constraint
>fires exactly when this move is problematic. Maybe something should be
>negated. On the other hand the owl_escape_value(C) will never be
>positive because C is always as close as diagonal to the goal dragon.
>See the owl_escape_value() function in owl.c. The reason for this
>limitation is to avoid dragons "escaping" towards themselves.

Perhaps just delete the pattern altogether - as nothing broke
badly, in this patch which effectively disabled it.  
I think there are better ways to write this pattern, if needed, anyway.

>
>> +Pattern D230
>> +# tm New Pattern (3.1.16)
>> +
>> +OO...       expand along edge.
>> +....*
>> +.....
>> +
>> +:8,-,value(80)
>
>No edge present.
Right. Oops.  Should be along the bottom, of course.