Master X-Sums Sudoku: Expert 9x9 Logic Challenge #154

Currently, the Sudoku puzzles I am posting are in three different series. One is Mini Sudoku Series, where I am posting Mini Sudoku puzzles for the kids. Another is the Fun With Sudoku Series, where I am posting Easy and Medium difficulty level 9x9 Sudoku puzzles. The third is The League of Extraordinary Ladies & Gentlemen, which is also known as the Daily Sudoku League, where every Thursday, I am posting the puzzles. Sudoku posted in this series is relatively tough and has a narrow solving path. Moreover, for the other two series, I schedule the puzzles in advance, so that these puzzles get posted automatically every day. However, for the Daily Sudoku League, on the day of posting itself, I decide which puzzle to post. I choose the puzzle depending upon the feedback received from Prasanna Seshadri to make sure that the particular puzzle posted in this series has a narrow solving path.

Today's puzzle, X-Sums Sudoku, is currently one of my favorite puzzles, even though I have not created many puzzles of this type. My previously created puzzle of this type was with the Irregular grid. This is the first one with the standard 9x9 Sudoku grid. This puzzle has a very interesting solving path, and till the end, the outer hints are getting used. Looking forward to your feedback regarding this puzzle!

This X-Sums Sudoku puzzle I am posting in The League of Extraordinary Ladies & Gentlemen as the 154th Sudoku in this series. Can you solve this Sudoku Puzzle?

Rules of X-Sums Sudoku

Standard Classic Sudoku Rules apply. Additionally, the clues outside the grid indicate the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.