Why is this variable's type its own class?

Question

The following is a paraphrase of someone else's code. In this example, what exactly is chessSolver and how would you use it? It looks like a variable that's being assigned to a new instance of its own class (Game) which seems to be overriding a method (solver()).

public class Game {
  protected solver(){}; // Will be overridden

  protected final static Game chessSolver = 
    new Game() {
      protected void solver() {
        /*...*/
      };
    };
}