In this paper we consider the extension of the n-queens problem to the
Mจobius strip; that is, the problem of placing a maximum number of
nonattacking queens on the mืn chessboard for which the left and right
edges are twisted connected. We prove the existence of solutions for the
mืn Mจobius board for classes of m and n with density 25/48 in the set
of all m ื n Mจobius boards, and show the impossibility of solutions for
a set of m and n with density 1/16. We also have computed the total
number of solutions for the m ืm Mจobius board for m from 1 to 16.