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The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.
Game History - Sudoku Puzzle Game
Sudoku, originally called Number Place is a logic-based, combinatorial
number-placement puzzle. The objective is to fill a 9×9 grid with digits
so that each column, each row, and each of the nine 3×3 subgrids that
compose the grid (also called "boxes", "blocks", or "regions") contains
all of the digits from 1 to 9. The puzzle setter provides a partially
completed grid, which for a well-posed puzzle has a single solution.
Completed games are always a type of Latin square with an additional
constraint on the contents of individual regions. For example, the same
single integer may not appear twice in the same row, column, or any of
the nine 3×3 subregions of the 9x9 playing board.
French newspapers featured variations of the puzzles in the 19th
century, and the puzzle has appeared since 1979 in puzzle books under
the name Number Place. However, the modern Sudoku only started to become
mainstream in 1986 by the Japanese puzzle company Nikoli, under the name
Sudoku, meaning "single number". It first appeared in a US newspaper and
then The Times (London) in 2004, from the efforts of Wayne Gould, who
devised a computer program to rapidly produce distinct puzzles.