[Computer-go] Specifying Chinese rules in SGF

Nick Wedd nick at maproom.co.uk
Mon Jun 23 15:30:42 PDT 2014


On 23/06/2014 22:16, Erik van der Werf wrote:
> Just use "Chinese". It is mentioned in FF[3] (e.g., see
> http://www.red-bean.com/sgf/ff1_3/ff3.html#Properties under Root
> Properties). I see no reason why this would have changed.
>
> <Flamebait> Notice that the Chinese rules don't really use positional
> superko. The KGS version of the Chinese rules do, but the official
> Chinese rules are a bit more sophisticated...</Flamebait>

Well yes. When wms wrote KGS, he implemented what the Chinese rules
said (or rather, what the official English translation of them said)
rather than what they meant.

Nick

>
> Erik
>
>
>
>
> On Mon, Jun 23, 2014 at 11:03 PM, Peter Drake <drake at lclark.edu> wrote:
>> SGF(2) has a place to specify the ruleset, according to
>> http://www.red-bean.com/sgf/properties.html:
>>
>> Property:	RU
>> Propvalue:	simpletext
>> Propertytype:	game-info
>> Function:	Provides the used rules for this game.
>> 		Because there are many different rules, SGF requires
>> 		mandatory names only for a small set of well known rule sets.
>> 		Note: it's beyond the scope of this specification to give an
>> 		exact specification of these rule sets.
>> 		Mandatory names for Go (GM[1]):
>> 			"AGA" (rules of the American Go Association)
>> 			"GOE" (the Ing rules of Goe)
>> 			"Japanese" (the Nihon-Kiin rule set)
>> 			"NZ" (New Zealand rules)
>>
>>
>> How can we specify the Chinese rules normally used in computer Go?
>>
>> They're *almost* equivalent to AGA rules, but AGA uses situational superko
>> while Chinese uses positional superko. The difference would only come up
>> extremely rarely, potentially making for a nasty bug.
>>
>> For those who don't know these terms:
>>
>> http://senseis.xmp.net/?Superko
>>
>> --
>> Peter Drake
>> https://sites.google.com/a/lclark.edu/drake/
>>
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-- 
Nick Wedd
nick at maproom.co.uk



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