Piran theme
In the set play and solution mates are given by the same white piece using the pin of the same black piece.
Bišćan, Dragutin
Problem, 1959
h#2* (7+9)
1...Rd1
2.Qf5+
Sf6#
1.Kd3
Ke7
2.Qe4+
Se5#
Kniest, Peter
Aachener Nachrichten, 1967
h#2* (6+5)
1...Bxc3
2.Kxc3
Rc4#
1.Qb4
Rxc3+
2.Kxc3
Rc4#