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by Tobs40 265 days ago
Author here!

Yes, if Gurobi and my code run as intended and I did not mess up any thinking while simplifying my chess model, then what I did is proof that the maximum number of legal moves available in a chess position reachable by a sequence of legal moves from the starting position is 218 (upper and lower bound). Gurobi proved the entire search space as "at most as good" using bounds, basically.