Frame Diagonal Sudoku (Fun With Sudoku #196)

Frame-Diagonal Sudoku type appeared in the 2nd round of the World Puzzle Federation Sudoku Grand Prix 2016. I created two Sudoku puzzles of Frame Diagonal Sudoku type for practice for this championship. One puzzle is already published with the title Frame-Diagonal Sudoku (Daily Sudoku League #158) and this is the second puzzle that I am publishing now. In fact, this is the 1st one that I created. This is having all the external hints given. While creating the next Frame Diagonal Sudoku type I decided to omit a few external hints to make this Sudoku more interesting. In fact, both of these puzzles are tough and have an interesting solving path.

This Frame Diagonal Sudoku, I am posting in the Fun With Sudoku Series as the 196th puzzle in this series. Can you solve this Sudoku puzzle?

Rules of Frame Diagonal Sudoku

Apply Standard Classic Sudoku rules. Additionally, each marked diagonal must also contain each number from 1-9 exactly once. The clues outside the grid indicate the sum of the first 3 numbers placed in the corresponding direction.