Overlapping Sudoku (Mini Sudoku Series #15)

Overlapping Sudoku is appearing in the finals of Sudoku Champs 2015. I have just now created this mini Overlapping Sudoku, so that a new comer can understand the rules of this Sudoku better.

I am posting this Mini Overlapping Sudoku as 15th Sudoku in Mini Sudoku Series.

Rules of Overlapping Sudoku

 Mini Classic Sudoku Rules apply to both overlapping grids.

Overlapping Sudoku (Mini Sudoku Series #15)

Overlapping Sudoku (Mini Sudoku Series #15) Solution

Previous Mini Sudoku Series puzzle: Classic Sudoku (Mini Sudoku Series #14)

Next Mini Sudoku Series Puzzle:  Linked Classics Sudoku (Mini Sudoku Series #16) 

Answer to Mini Sudoku Series puzzle titled Irregular Sudoku (Mini Sudoku Series #19)