Sudoku X has been an alternative to regular Sudoku puzzles, when I wanted some minimal relief. Having a vest pocket pair of constraints when I was otherwise reduced to guessing was nice. The site: easton.me.uk provides a downloadable (Windows) Puzzle Generator for Sudoku X (Nothing on this variant, though).
Because this variation is not one that Sudoku Solvers solve programmatically, I had to reverse engineer the solution by specifying a proper set of values for the Y and then solving by adding one number at a time and insuring that the result did not produce a conflict with the other cells. I stopped when there was a single unique solution. (I used the Web Based: Sudoku Solver By Logic.) I’m not sure if I could have provided fewer clues, but feel free to erase as many as you want and see if you can solve it that way.