Somov mate
Black either blocks a thematic square (block Somov, Somov B2) or opens a white line to guard a thematic square (line-opening Somov, Somov B1), thus enabling White to close a guard line to that square in the mate. [FIDE Album]
See also: Anti-Levman.
Alias: Somov 1/2; Somov B1/B2; Theme B/B2.
Abdurahmanović, Fadil
Kotelec, 1987
h#2 4.1... (7+5)
1.Sc3
Rfc8
2.Se4
Rd5#
1.Se3
Rd5+
2.Ke4
Rf4#
1.Sb4
Rxf3
2.Sd3
Be3#
1.Sf4
Bd5
2.Kxe5
Bf6#
Somov B2 (x4).