Abstract: A plurality of Sudoku-type games are provided within a single matrix, using one or more “key cells” for presenting to the player the number of different answers possible for the respective cell. A scoring system is included to yield different scores for the different game outcomes. In accordance with the invention, game publishers can accommodate players of different skill levels with a single matrix, players can choose the level of difficulty of the selected game, and a each matrix can yield several games for the player to solve.