Onkoud theme
In one phase, a white piece A pins a black piece C, while the white piece B is captured. In another phase, the white piece B pins the black piece C on a different axis, while the piece A is captured.
See also: Transferred pin.
Onkoud, Abdelaziz
Springaren, M. Persson MT, 2012
4th Prize
h#2 2.1... (5+11)
1.Bxd1
Qxe4+
2.Kxe4
Re6#
1.Sxb1
Rxd4
2.Kxd4
Qc5#
Kniest, Peter
Aachener Nachrichten, 1967
h#2* (6+5)
1...Bxc3
2.Kxc3
Rc4#
1.Qb4
Rxc3+
2.Kxc3
Rc4#