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
1.a5 Bg4 2.Ka6 Bxf5 3.Bd5 Be6 4.Sf5 Bd7 5.Bf7 Bc8#
FEN: b7/pk4q1/pp1n2r1/1r3p1K/4p3/3p1n1B/4p3/8
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