function F = KBg91F(x)
%

F(1) = -0.81872 + (1-x(5)) + (1-x(4)) + (1-x(3)) - x(6)*(1-x(3)) - x(7)*(1-x(4)) - x(7)*(1-x(3)) + x(7)*x(6)*(1-x(3));
F(2) = -0.9134 + x(1) + x(3) + x(5) - x(8)*x(5) - x(9)*x(3) - x(9)*x(5) + x(9)*x(8)*x(5);
F(3) = -0.53553 + (1-x(5));
F(4) = -0.83617 + (1-x(2)) + x(4) - x(10)*x(4);
