Free Daily Sudoku: Quadruple Sudoku X 9×9 (0073)

“Quadruple Sudoku X 9×9” Puzzle Rules:

Fill the grid with the digits 1–9 so that each digit appears exactly once in every row, column, and 3×3 box.
Additionally, each digit must appear exactly once on both main diagonals.
Some grid intersections contain a set of four digits showing exactly the numbers in the four cells surrounding that intersection (in any order).

Solution of this Quadruple Sudoku X 9×9 can be viewed by clicking on button. Please do give your best try to solve this Sudoku puzzle before looking at the answer.

Link to solve it online: Penpa+