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XV Sudoku (Fun With Sudoku #191)

Recently I have posted Tens Sudoku and Fives Sudoku. Now it is time to publish the mix of both these Sudoku puzzles called XV Sudoku. In Fives Sudoku wherever sum or difference of adjacent numbers is five, it is marked with V. This XV Sudoku type differs a bit from Fives Sudoku as in XV Sudoku only sum of the adjacent numbers should add up to get V marking. For X marking the rules remains same as Tens Sudoku. 
XV Sudoku is one of the most like Sudoku type. I always look forward to create this type of Sudoku puzzle. Till now more than 10 9x9 XV Sudoku I have already published here and now this XV Sudoku, I am posting in Fun With Sudoku Series as 191st Sudoku in this series.
XV Sudoku (Fun With Sudoku #191)
XV Sudoku (Fun With Sudoku #191)
XV Sudoku (Fun With Sudoku #191) Answer

Previous Sudoku Fives Sudoku (Fun With Sudoku #190)

Below is answer of XV Sudoku puzzle titled XV Sudoku (Fun With Sudoku #181)
XV Sudoku (Fun With Sudoku #181) Answer
XV Sudoku (Fun With Sudoku #181) Answer

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  1. Hi Rajesh, what rule will the adjacent numbers where nothing is marked follow? Rule of fives or tens?

    1. Hi Sachin, XV Sudoku follows the converse rule i.e. If an X or V is not given, the two digits cannot sum to 5 or 10. It is very important rule and widely used in this type of puzzles. One may try solving mini XV Sudoku puzzles to understand this Sudoku type as 9x9 Sudoku puzzles of this type are tough and very difficult to use without applying converse rule. There are around 8 Mini XV Sudoku puzzles published on this website as of now.


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