Noun
sudoku (countable and uncountable, plural sudokus)
(games, puzzles) A type of pencil puzzle played on a square grid, requiring each of the columns, each of the rows, and each of the subregions (called "boxes" or "regions") to contain the lowest whole numbers up to the dimension of the puzzle, usually 1 to 9, once each. The subregions are rectangular or square except in variants.
For instance, steganography using sudoku puzzles has as many keys as there are possible solutions of a sudoku puzzle, which is main. Source: Internet
Doing for letters what Sudoku did for numbers, it's the obsessive new puzzle craze that starts with 144 letter tiles in a banana-shaped bag and captures all the fun of crosswords and word games like Scrabble and Boggle. Source: Internet
In addition to cultivating their hobbies with Sudoku, crossword puzzles, drape forts, and sock puppets, the other professional obligation of Anesthesia is to adjust tables. Source: Internet
Less opulent are "stocking stuffer" gift books, although The Big Book of Visual Sudoku by Maki Kaji (Workman) would need a very large stocking: 273 puzzles that are both catnip and Waterloo for Sudoku fans. Source: Internet
If you aren't familiar with the Puzzle Lady mysteries, there are crosswords and a sudoku by Will Shontz to help you solve the mystery. Source: Internet
Sure, crosswords and sudoku puzzles will keep your brain in tip-top shape, but so can Alexa. Source: Internet