> They neither call it unbeatable nor mention hardcoding anything.

What about this tweet from OpenAI?

"Our Dota 2 AI is undefeated against the world's best solo players" [1]

Also Musk called it more complex than Go,

"OpenAI first ever to defeat world's best players in competitive eSports. Vastly more complex than traditional board games like chess & Go." [2]

[1] https://twitter.com/OpenAI/status/896157788908290048

[2] https://twitter.com/elonmusk/status/896163163581825025?lang=...