Paros theme
Two black Bivalves, involving the same two lines, in such way that the line, which is opened in the first line of play, is closed in the second and vice versa.
See also: Bivalve.
Alias: Reciprocal bivalve.
Semenenko, Valery
Belgrade Internet Tourney, 2012
6th HM
h#2 b) +wSe8
(3+10)
a) 1.Se2+
Kxe4
2.Bc7
Qf8#
b) 1.Sg3+
Kxf4
2.Re7
Qa8#
Kricheli, Josif
Schach-Echo, 1974
h#2 2.1... (6+7)
1.Sb3
Be4
2.Ke3
Qc1#
1.Sd7
Re4+
2.Kxf5
Ra5#
Bicolor Paros.