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Sudoku is a logic puzzle in which nine symbols must be placed in a grid so that each row, column and 3x3 box contains exactly one of each symbol. The symbols are almost always the digits 1-9, but the basic puzzle is not a mathematical one. However, some variants are mathematical (see below).

VariantsEdit

Killer SudokuEdit

In Killer Sudoku puzzles, there are no starting clues. Instead, regions of the puzzle are outlined with dotted boxes and a number. The number indicates what the digits in the region must total to, adding a mathematical element to the puzzle.

Sudoku XEdit

The same as normal Sudoku, but the two diagonals must also contain each symbol exactly once.

Samurai SudokuEdit

Samurai Sudoku involves fusing multiple grids so that they have some of their 3x3 boxes in common. This means that solving the puzzle requires simultaneously solving multiple grids.


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