Chess Strategy: How to use an open file?

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Most chess players know that a common strategic objective for a rook or queen on an open file is to reach its seventh or eighth rank. But the question is: how to obtain an open file OR how to use it effectively?

IM Boroljub Zlatanovicwill teach you with an illustrative example – a game played between Rudlof Maric and Tigran Petrosian in the year 1970.