It took only four hours to play against himself to synthesize the chess knowledge of a millennium, and reach a level where he not only surpassed humans but also the world champion of Computer analysis modules, Stockfish.


https://deepmind.com/blog/alphago-zero-learning-scratch/
https://chess24.com/es/informate/noticias/el-nuevo-amo-del-ajedrez-alphazero Spanish