Sudoku Ultra | Price: $24.95 | Size: 5.5 Mb

Sudoku for Windows is one of the most astonishing, challenging, fascinating, and amusing puzzles to sweep the world in decades. It has a unique solution that can be reached logically without guess. Fill digits from 1 to 9 into the blank spaces. Every row must contain one of every digit. So must each column, as must each 3x3 block.