A move of a long distance figure across a critical square, after which it can be interfered by another piece.
Breuer, Josef
Die Schwalbe 1948
FIDE Album 1945-55
mate in 4 moves
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Blog about chess problems
A move of a long distance figure across a critical square, after which it can be interfered by another piece.
Breuer, Josef
Die Schwalbe 1948
FIDE Album 1945-55
mate in 4 moves