It refers to the seventh rank.

Torre, who was lost a few moves earlier, profits from Lasker's mistake (22...h6?! 23...Qd5?) by setting a powerful windmill (25.Bf6!!) that allows his rook to wreck havoc on the 7th rank (any rook's promised land): White wins two pawns and a bishop, refrains from snatching a7 in order not to activate the black rook on a8, and then goes back to pick the queen.

Although I had never seen that famous game called The Seventh Seal before (rather : The Windmill Immortal), its fate was undoubtely sealed on the seventh rank !

It refers to the seventh rank.

Torre, who was clearly worse a few moves earlier, profits from Lasker's mistake (22...h6?! 23...Qd5?) by setting a powerful windmill (25.Bf6!!) that allows his rook to wreck havoc on the 7th rank (any rook's promised land): White wins two pawns and a bishop, refrains from snatching a7 in order not to activate the black rook on a8, and then goes back to pick the queen.

Although I had never seen that famous game called The Seventh Seal before (rather : The Windmill Immortal), its fate was undoubtely sealed on the seventh rank !