Suppose that the actual state of play is \(w_4\). So, player 1 (Ann) chooses \(u\) and player 2 (Bob) chooses \(r\). Further, suppose that \(L= \{w_1,w_2,w_5\}\) is the event where where player 2 chooses \(l\) (similarly for \(U\), \(D\), and \(R\))