Since the development of the "SOR'' method by David Young [3], there has been a strong interest to use more than one parameter for SOR to improve the convergence [13], [14], [15] and [16].

D. Young himself considered a two parametric method called "MSOR''. The two parameters weight the diagonal of positive-definite and consistently ordered 2-cyclic matrix [6], removing Young's hypothesis that the eigenvalues of Jacobi iteration matrix must all be real. We prove for certain cases that when "SOR'' diverges, the two parametric method converges.