Book:Total Sudoku

Enjoying international popularity, the contemporary game of Sudoku has broad appeal regardless of gender, age or nationality. It can be found in daily newspapers, books, on the internet and even on the radio and television. According to Will Shortz, Sudoku could not have become so popular before the rise of personal computers as nearly all sudoku puzzles are computer generated, using programs that understand all the logical solving strategies, from the most basic to the most sophisticated, and so can determine mathematically how hard or easy a puzzle is. The various levels of difficulty available open the game up to players at every level.