I don’t like it. “The problem of creating AI that is superhuman at chess” isn’t encapsulated in the word “chess”, so you shouldn’t say you “solved chess” if what you mean is that you created an AI that is superhuman at chess. What it means for a game to be solved is widely-known and well-developed[0]. Using the exact same word, in extremely similar context, to mean something else seems unnecessarily confusing.
I don’t like it. “The problem of creating AI that is superhuman at chess” isn’t encapsulated in the word “chess”, so you shouldn’t say you “solved chess” if what you mean is that you created an AI that is superhuman at chess. What it means for a game to be solved is widely-known and well-developed[0]. Using the exact same word, in extremely similar context, to mean something else seems unnecessarily confusing.
[0] See https://en.wikipedia.org/wiki/Solved_game