function F = KBg13F(x)
%

F(1) = -0.94153 + (1-x(2)) + (1-x(1)) + x(3) - x(6)*x(3) - x(7)*(1-x(1)) - x(7)*x(3) + x(7)*x(6)*x(3);
F(2) = -0.88189 + (1-x(1)) + x(4) + x(5) - x(8)*x(5) - x(9)*x(4) - x(9)*x(5) + x(9)*x(8)*x(5);
