AlphaZero Updated +Created
www.quora.com/Which-chess-engine-would-be-stronger-Alpha-Zero-or-Stockfish-12/answer/Felix-Zaslavskiy explains that it beat Stockfish 8. But then Stockfish was developed further and would start to beat it. We know this because although AlphaZero was closed source, they released the trained artificial neural network, so it was possible to replay AlphaZero at its particular stage of training.
Gridworld Updated +Created
This is analogous to many traditional board games such as Chess, the concept is very natural and maps well into computer.
The downsides of gridworld games are:
  • it is hard to model speed in discrete worlds. When you 10x faster, when do you collide with something else that is also crossing your path?
  • they tend to not use vector representations of objects. So to have an object be 10x longer than another one, the naive implementation has to add 10 smaller objects. This becomes untenable as the number of objects increases.
Human game used for AI training Updated +Created
This section is about games initially designed for humans, but which ended up being used in AI development as well, e.g.:
Leela Chess Zero Updated +Created
Related to Leela Zero, a Go engine
Deep learning implementation, a bit analogous to AlphaZero, but for Chess only.