For questions related to DeepMind's AlphaZero, which is a computer program that can play Go, Chess, and Shogi. AlphaZero achieved, within 24 hours of training, a superhuman level of play in these three games by defeating world-champion programs Stockfish, Elmo, and the 3-day version of AlphaGo Zero. AlphaZero was introduced in "Mastering Chess and Shogi by Self-Play with a General Reinforcement Learning Algorithm" (2017) by David Silver et al.
Have a look at the research paper that introduced AlphaZero Mastering Chess and Shogi by Self-Play with a General Reinforcement Learning Algorithm (2017) by David Silver et al. and https://en.wikipedia.org/wiki/AlphaZero.
