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Noun: sudoku  su'dó-koo or su'dow-koo
  1. Number puzzle in which numbers must be fit into a 9x9 grid such that each numeral appears exactly once in each row, column and each of nine 3x3 blocks
    "She relaxed by solving a sudoku puzzle every evening"

Derived forms: sudokus

Type of: mystifier, puzzle, puzzler, riddler, teaser

Encyclopedia: Sudoku