Sudoku Ace is new puzzle software based on Sudoku - a Japanese game initially introduced in 1986. A tough Sodoku puzzle may take a few hours to solve. This is where the benefit of software comes in. Since Sudoku Ace isn't pen and paper, there are an unlimited number of corrections that can be done. The program is able to generate millions of different random Sudoku grids and has "Hint" and "Solve" features to ease the solution process.