Sudoku is defined by Merriam-Webster as a 9-by-9 grid puzzle in which the grid is divided into 3-by-3 boxes. Every row, column and box must contain the numbers one through nine, no repeats. Need a ...

Sudoku is like any other logic puzzle, in that it relies on deductive reasoning for its solution. There are numbers in the game, but no arithmetic is required to figure out where they go. Its ...

Maki Kaji, a university dropout who turned a numbers game into one of the world’s most popular logic puzzles and became known as the “Godfather of Sudoku,” died on Aug. 10 at his home in Tokyo.