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XV Sudoku Puzzle (Fun With Sudoku #262)

I am always looking for feedback to improve this website. This feedback can be anything from layout to any broken puzzle. It will help me to improve this website. Yesterday, I received feedback from one of the reader that Sudoku puzzle titled XV Sudoku Puzzles (Fun With Sudoku #240) does not match with the answer provided. However if I can the given digit from 7 to 8 then it matches with the given solution. However the puzzle was unique and can be solved with the given hint 7 without changing anything in the given XV patterns. 
This lead me to discover few things for XV Sudoku puzzle. Numbers 1,4,9,6 and 2,3,7,8 are related to each other respectively. It means that one can exchange 1 and 4 & 9 and 6 without changing anything in the given XV pattern. Similar one can exchange 2, 3 and 8, 7 without changing anything in the given pattern. To prove this fact, I have created today's XV Sudoku puzzle.
Today's puzzle is remake of XV Sudoku Puzzles (Fun With Sudoku #240) in which given 8 in that puzzle is changed with 7, leading to change in the solution string completely. In the solution string all the 7 gets changed to 8 and all the 2 gets changed to 3 and vice versa. However the solving path, pattern to XV remains same. Just try to solve these two puzzles independently to  understand it better :).
I am posting this XV Sudoku puzzle in Fun With Sudoku Series as 262nd Sudoku puzzle in this series.

Below is solution of XV Sudoku puzzle, which is published with title XV Sudoku Puzzle (Daily Sudoku League #207)
XV Sudoku (Daily Sudoku League #207) Puzzle Solution
XV Sudoku (Daily Sudoku League #207) Puzzle Solution

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