I don't think this is sufficient proof for AGI though.
reply
Curated synthetic data has yielded excellent results. Even when the curation is AI
There is no requirement to train from scratch in order to get better, you can start from where you are.
You may not be able to design a living human being, but random changes and keeping the bits that performed better can.
We'll see if that generalizes beyond board games.
I don't think this is sufficient proof for AGI though.