(X∗, Y∗) is a saddle point if and only if minj=1,2,…,m E(X∗, j) = maxi=1,2,…,n E(i, Y∗)

(X∗, Y∗) is a saddle point if and only if minj=1,2,…,m E(X∗, j) = maxi=1,2,…,n E(i, Y∗)

(X∗, Y∗) is a saddle point if and only if minj=1,2,…,m E(X∗, j) = maxi=1,2,…,n E(i, Y∗)
(X∗, Y∗) is a saddle point if and only if minj=1,2,…,m E(X∗, j) = maxi=1,2,…,n E(i, Y∗)