That's for tic tac toe which has a rather simple "state of the game" and very limited set of things you can do. The game described in the article would be much more complex... but you can get an idea of what code looks like from those two examples.

It is very terse and not English (though often uses English for tokens to make it easier for the programmers - the key point there is that it has a grammar of its own that isn't English even though it may use English terms).