Brixi theme
H#4: The mate is delivered from a square controlled by two pinned black pieces.
A thematic tournament featuring this idea was announced by Heinz Brixi (Austria, 1876–1952) in the Deutsche Schachblätter in 1927 or 1928.
Fox, Charles Masson
Deutsche Schachblätter, Brixi TT, 1928
1st Prize
h#4 (5+15)
1.Rd6
f6
2.Qc4
f7
3.Kd4
f8=S
4.Kc5
Se6#