[Computer-go] Fuego's new opening

Michael Williams michaelwilliams75 at gmail.com
Mon May 3 14:48:22 PDT 2010


What do you mean by "break symmetry"?  To me, it means play a move that results in an asymetric board.  But why not just detect the symmetric moves and only 
simulate one of them?


valkyria at phmp.se wrote:
> 
> ...
> 
> Valkyria currently play quite narrow book starting with E5. Since the 
> last tournament I noticed I should try to break symmetry before letting 
> it think because other wise it could spend a minute on two moves that 
> are symmetric. But I am considering to widen the choices for Black on 
> the first move.
> 
> ...
> 
> Quoting Martin Mueller <mmueller at ualberta.ca>:
> 
>> It is just an experiment that I am running right now. I don't know  
>> which move is better. The M in the version number 1111M indicates  
>> that the program is a modified version. In this case the  modification 
>> is that I added or changed a few moves in the book. But  I am not 
>> confident in these changes so it is not in the svn. This  modified 
>> version will randomly choose either E5 or E4. See the diff  below.
>>
>>     Martin
>>
>> diff book.dat book-3.dat
>> 1504c1504
>> < 9 | E5
>> ---
>>> 9 | E5 E4
>> 1698c1698
>> < 9 E5 G5 | F3 G4
>> ---
>>> 9 E5 G5 | F3
>> 2370c2370
>> < 9 F5 D5 E6 | F4
>> ---
>>> 9 F5 D5 E6 | E4
>> 2732c2732
>> < 9 D5 F5 F4 G4 E4 G3 F6 | G6
>> ---
>>> 9 D5 F5 F4 G4 E4 G3 F6 | G5
>> 2913a2914,2919
>>> 9 E5 E3 C4 C3 B3 D4 | D5
>>> 9 E5 E3 C4 D4 | D5
>>> 9 E5 E3 C4 D4 D5 C3 | E4
>>> 9 E5 E3 C4 D4 D5 C3 E4 D3 | G4
>>> 9 E4 E6 | D6
>>> 9 E4 E6 D6 D7 D5 C7 | F6
>>
>>     Martin
>>
>>> I noticed on CGOS that the latest Fuego is starting at the 5-4 point 
>>> rather
>>> than the 5-5 point.  I know that Fuego uses a book.  Does this mean that
>>> analysis of games between strong programs shows that 5-4 is 
>>> significantly
>>> better than 5-5?
>>
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> 
> 
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