Comment by ankit219

(author here) great paper to cite.

What i think you are referring to is hidden state as in internal representations. I refer to hidden state in game theoretic terms like a private information only one party has. I think we both agree alphazero has hidden states in first sense.

Concepts like king safety are objectively useful for winning at chess so alphazero developed it too, no wonder about that. Great example of convergence. However, alphazero did not need to know what i am thinking or how i play to beat me. In poker, you must model a player's private cards and beliefs.