The rooks belong behind passed pawns, behind their own in order to support their advance, behind the enemy's in order to impede their advance.
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Tarrasch, St Petersburg 1914: International Chess Tournament, translated by Dr Robert Maxham, Caissa Editions, Yorklyn, DE, 1993, ISBN:0-939433-17-6—comment on ***Frank James Marshall vs Emanuel Lasker, St. Petersburg (1914), rd 3, Apr-24, p. 83, emphasis in original.