Code Sudoku is a boxed edition of Sudoku (aka Number Place) puzzle. Contains plastic board, 81 tiles with numbers 1 to 9, 44 ready to solve puzzle templates, two blank sheets (for creating new puzzles or writing down ones from newspapers), and detailed manual.Solving the puzzles is aided with erasable marker and sponge (included). The game has also multi=player option. Each player, in number from two to four gets scorekeeper (placed at the edge of the board, where are placed scoring tracks). Then, the game begins. The sand timer is started and each player have one minute to place the number tiles on the board. For 1st tile placed correctly player gets 1 pt, for second one 2 pts and so on. For complete row, column or box player gets 3 pts.Score keepers and sand timer are included too. - BoardGameGeek