Sudoku: A Logical and Addictive Brain Teaser
Sudoku, a number puzzle game, has its origins in Switzerland. The modern version we know today, however, was popularized in Japan in the 1980s by puzzle publisher Nikoli Co. Ltd. Initially named “Number Place,” it gained international recognition in the early 21st century. The name “Sudoku” is a blend of two Japanese words, “su” (meaning…