H#2: Black (or White in bicolor Gamage theme) closes the line of a black pinned piece allowing White to unpin it directly on the mating move (by white pinning piece).
Unlike the Gothart theme where the unpin is indirect.
⧗ Frederick E. Gamage (USA, 1882-1956).
See also: Goethart theme.
Korponai, József
Feenschach, 1973
1st HM
1.Rg2
Bg3
2.e5
Qa3#
1.Bg4
Sd1
2.e6
Qa8#
Caillaud, Michel
diagrammes, 1994
4th Prize
1.Rc6
Rd6
2.Kc4
Qe6#
1.Bc7
Bf4
2.Kc3
Qh3#
Abdurahmanović, Fadil
Probleemblad, Dutch Association of Chess Problem Friends-60 JT, 1991
1st Prize
1.Sd4
Rb8+
2.Kc7
Qf4#
1.e5
Rd8
2.Kc6
Qh6#
Seider, Shlomo
The Problemist, 1972
1st Prize
1.Kc6
d4
2.Be3
Qc2#
1.Kc5
Be6
2.Rf6
Sf5#