%
% The surface plot shows the game solution is the saddle point of the 
% expected payoff function for two strategies game with payoff matrix
% A=[[-2 2]; [4 -3]]
%
figure(1)
hold off

[x,y]=meshgrid(0:.01:1);
E=y.*(-2*x+4*(1-x))+(1-y).*(2*x-3*(1-x));
meshc(x,y,E);
axis([0 1 0 1 -3 4])
xlabel('x')
ylabel('y')
zlabel('E')
hold on
plot3([7/11],[5/11],[35/11-3],'r.','markersize',20)
