H#2: In the first move, a black piece opens a future line for white (anticipatory line opening). A white piece, in white’s first move, arrives at the opened line ready to exploit it. Black’s thematic piece, in addition to the line opening, must also perform on B1 or B2 one of the following: pin/self-pin, unpin/self-unpin or interference.
This is the theme of the 27th SABRA Composing Tourney (Jurmala, 2024).
Witztum, Menachem
Polish Chess Federation, 2024
a) 1.Ba6
Qxb3
2.Bf4
Qh3#
b) 1.Ba5
Qxb2
2.Bf5
Qg2#
FEN: K6R/8/8/4p1p1/6k1/Qp1b4/1p1b4/r7