Yeah, but the encoding of the possible states, etc are all based on the actual board game. We made an abstract version of the game and fed it to a learning algorithm.
At least with regards to the original question, your point isn't a rebuttal. That we can make an abstraction of the game and then operate on that abstraction just means the meaningful/informative portions of the game (within the context of playing the game) are contained in the abstraction. In fact, that just is what an abstraction is: taking only the necessary features for some particular context.
You seem to be defining meaning just as what conscious entities endow something with, and so our abstract notion of Go necessarily receives its meaning from us. I don't agree with this.
At its most basic, meaning just is the set of concepts and behaviors that allow correct manipulation as judged by some standard. So in this case the rules of the game have meaning within the context of a game of Go as they allow for correct manipulation of the game state. That what constitutes valid board states was derived from conscious entities isn't relevant here. The rules of Go have meaning (allow for proper manipulation) within the context of the system of valid board states and transitions between them.
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Concepts are something minds create to make sense of the world. Correct manipulation as judged by standard is also a mental judgement. The rules of Go are rules because human beings defined them. That there is a context for valid board states is because we created a game that had a context.
>The rules of Go are rules because human beings defined them.
But this says nothing about meaning within this framework. "Concepts"/entities/units within the framework have meaning precisely because of the relations inherent between the entities and states within the framework. The ultimate source of the framework is not relevant.
The entities in the system do not "get" meaning because of a conscious observer, they get meaning because of the relational properties between the entities. If every person in the universe suddenly died, those meaningful relationships would still be valid. After all, the relationships entailed by math is true regardless if anyone is there to recognize them.