XV Trio Sudoku (Fun With Sudoku #127)

I am trying to mix XV Sudoku with different Sudoku types and am able to create a few good puzzle types like Non Consecutive XV Sudoku (Daily Sudoku League #134), Anti Knight XV Sudoku (Daily Sudoku League #106), Jigsaw XV Sudoku (Daily Sudoku League #80), etc. Here is another new Sudoku type, XV Trio Sudoku, after mixing XV Sudoku with Trio Sudoku. It is quite an interesting Sudoku type and requires a few hints to be given. Even though only 1 hint is given in this Sudoku, this Sudoku is quite easy.

It has taken quite a lot of effort to create the Sudoku image for XV Trio Sudoku. First, I tried to create an ESP Image. I was not quite successful in creating the mixed image of XV Sudoku and Trio Sudoku. Later I created separate images of XV Sudoku and Trio Sudoku puzzles and merged these images together to create XV Trio Sudoku. I will be creating a few more puzzles of this type soon.

This XV Trio Sudoku, I am posting as the 127th Sudoku in the Fun With Sudoku Series.

Rules of XV Trio Sudoku

Classic XV Sudoku Rules apply. Additionally, cells with circles must contain the digits 1, 2, and 3. Cells with squares must contain the digits 4, 5, and 6. Blank cells must contain the digits 7, 8 and 9.