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Taking Sudoku Seriously: The Math Behind the World's Most Popular Pencil Puzzle is a book on the mathematics of Sudoku. It was written by Jason Rosenhouse and Laura Taalman, and published in 2011 by the Oxford University Press.
A typical Sudoku puzzle. A standard Sudoku contains 81 cells, in a 9×9 grid, and has 9 boxes, each box being the intersection of the first, middle, or last 3 rows, and the first, middle, or last 3 columns. Each cell may contain a number from one to nine, and each number can only occur once in each row, column, and box.
Go! Sudoku is a puzzle video game developed by Sumo Digital and published by Sony Computer Entertainment for the PlayStation Portable. Ubisoft released the game in North America. It was released in Japan under the name of Kazuo (カズオ), as Nikoli holds the trademark for Sudoku in the region,
Cracking the Cryptic (CTC) is a YouTube channel dedicated to paper-and-pencil puzzles: primarily sudoku, but also cryptic crosswords and other types of number-placement, pencil, and word puzzles. They occasionally stream puzzle games on YouTube.
Helping children with homework, reading, playing Scrabble or Sudoku, or watching documentaries, matched or beat the benefits of Brain Age. The children were split into four groups. The first two completed a seven-week memory course on a Nintendo DS, the third did puzzles with pencils and paper, and the fourth went to school as normal.
Puzzles constructed from more than two grids are also common. Five 9×9 grids that overlap at the corner regions in the shape of a quincunx is known in Japan as Gattai 5 (five merged) Sudoku. In The Times, The Age, and The Sydney Morning Herald, this form of puzzle is known as Samurai Sudoku.
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