Many times I tried to create Disjoint Groups Sudoku. However, whenever I was sending it to Prasanna for testing, he is so good at solving Classic Sudoku that he will solve my given Sudoku without using Disjoint Groups Sudoku Rules. Most of the time he is able to solve it using only Classic Sudoku Rules. This is my second Disjoint Groups Sudoku. My earlier Sudoku of this type is posted with the title Disjoint Groups Sudoku (Fun With Sudoku #13).
This Disjoint Groups Sudoku, I am posting as the 69th Sudoku in the Fun With Sudoku Series. Can you solve this Disjoin Groups Sudoku puzzle?
Rules of Disjoint Groups Sudoku
Classic Sudoku Rules apply. Additionally, cells with the same position in 3x3 boxes contain numbers from 1 to 9 i.e no number can repeat in the same position in 3x3 boxes.
 Disjoint Groups Sudoku (Fun With Sudoku #69)

Disjoint Groups Sudoku (Fun With Sudoku #69) Solution
Next Fun With Sudoku Series Puzzle: Classic Sudoku (Fun With Sudoku #70)

Solution of Fun With Sudoku Series Puzzle Classic Sudoku (Fun With Sudoku #73)

 Classic Sudoku (Fun With Sudoku #73) Solution