String theme
Gradual "stretching" of the movement of a piece in one direction along the same line (horizontal, vertical or diagonal).
Loshinskij, Lev
Korolkov, Vladimir
Problem, 1973
1st Prize
h#5 (2+14)
1.a5
Bg4
2.Ka6
Bxf5
3.Bd5
Be6
4.Sf5
Bd7
5.Bf7
Bc8#