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Rules of 'Quadruple Sudoku'

Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. Each set of four small numbers in the intersection of two lines indicate the numbers that are in the four adjacent cells.




Rohan said...

This is one of the easier variations of sudoku.

aman said...

Quadruple Clue Sudoku was invented by Henry Kwok. The variant was named by Serhiy Grabarchuk when it was published on his AgeOfPuzzles website in 2006. Please refer to

Henry Kwok was also asked to create the variant for the Second World Sudoku Championship 2007 in Prague.

Thanks to all sudoku addicts who like his sudoku variants so much that they recreate his sudoku variants in similar or different forms in various websites and championships under similar or different variant names.

Rohan Rao said...

Thanks a lot for the info...