Frame-Diagonal Sudoku (Daily Sudoku League #158)

Frame-Diagonal Sudoku appeared in the 2nd round of the World Puzzle Federation Sudoku Grand Prix 2016. I created this Sudoku for the practice for this championship. This Sudoku type is almost similar to Frame Sudoku with the additional rule that two main diagonals also should contain numbers from 1 to 9. In fact frame, Sudoku without these diagonal rules is most of the time solvable when all the frame hints are given. With the additional constraint of diagonals also containing numbers from 1 to 9 makes the puzzle easier. This is the reason I have not given all the frame hints to make this Sudoku challenge. I enjoyed creating this Sudoku and found it tough. So I will not recommend this Sudoku for new players. Hopefully experienced players will enjoy this Sudoku.

This Frame-Diagonal Sudoku, I am posting in The League of Extraordinary Ladies & Gentlemen as the 158th 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.