These puzzles disappeared about Entire world War I but reemerged in 1979 when an Indiana guy named Howard Garns printed the first modern-day Sudoku puzzle. His Sudoku employed a 9x9 grid, and all rows and columns needed to provide the numbers one–9. Sudoku games were being launched in Japan 5 https://quentint740zzw5.wikibriefing.com/user