The one exception to the stalemate defence is where the white king can mask the queen and approach the black king
1.Kb6
Kb1
2.Kc5+
Kc2
[2...Ka1
3.Kb4
Kb2
4.Qh2+
Kb1
5.Kb3
a1Q
6.Qc2#
]
3.Qe5
Kb1
4.Qe1+
Kb2
5.Qd2+
Kb1
6.Kb4
a1Q
7.Kb3
and mate cannot be prevented *