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Pairs Sudoku (Fun With Sudoku #31)



This Sudoku first time I saw in World Sudoku Championship 2009 (Puzzle G5). This puzzle I created for the team India practice.
I am re-posting this Pairs Sudoku as as my 31st Sudoku in Fun With Sudoku Series.
Rules of Pairs Sudoku
Classic Sudoku Rules apply. Additionally marked indexed cells (with alphabets) contain unique pairs of digits. One index represents one unique pair which does not occur anywhere else. The order of the digits in a pair must not be changed.

Pairs Sudoku  (Fun With Sudoku #31)
Pairs Sudoku  (Fun With Sudoku #31)

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