Disjoint Groups Sudoku (Fun With Sudoku #172)

To create Disjoint Groups Sudoku, it has taken many attempts from me to get it correct. Most of the time this puzzle type has been easy and does not use much of variation rules. So many of such puzzles I have been publishing as Classic Sudoku only after making minor adjustments. 

Today's Sudoku is one of the few Sudoku of this type that has been correctly using the Disjoint Groups Sudoku variation rules. Another one that uses rules fully was Disjoint Groups Sudoku (Fun With Sudoku #153) which I created for Sudoku Mahabharat 2015-16 Math Variations round.  I need to practice more of this Sudoku to get comfortable before creating more Sudoku of this type. Soon I am planning to create a few more Disjoint Groups Sudoku. Meanwhile, I am posting this Disjoint Groups Sudoku in the Fun With Sudoku Series as the 172nd puzzle in this series. Can you solve this Sudoku puzzle?

Rules of Disjoint Groups Sudoku

Disjoint Groups Sudoku (Fun With Sudoku #172)

Disjoint Groups Sudoku (Fun With Sudoku #172) Solution 

Previous Sudoku Original Sudoku (Fun With Sudoku #171)

Next Sudoku Sum Sandwich Sudoku (Fun With Sudoku #173)

Below is the solution for the Disjoint Groups Sudoku Puzzle, which is published with the title Disjoint Groups Sudoku Puzzle (Fun With Sudoku #255)

Disjoint Groups Sudoku (Fun With Sudoku #255) Puzzle Solution