Sudoku Wooden Board Game is logic-based, number-placement puzzle that is sure to please Soduku fans. Sudoku is a logic puzzle using the digits 1 thru 9. Each 3x3 grid within the puzzle can only use the digits 1 thru 9 one time each, and each row and column of the entire puzzle can only use the digits 1 thru 9 one time also. The entire game is made from wood including the pegs and comes with a solid wood cover to protect the pieces. On one side of the pegs the numbers are white, and on the other side, they are red so that you can set your fixed numbers with the red side, and use the white side for the variable. (or vice-versa) Comes with easy to understand rules for playing and solving Sudoku puzzles. A puzzle can take from 20 minutes to 2 hours to complete depending upon your experience. WARNING CHOKING HAZARD - Small Parts. Not for children under 3 years. Adult supervision recommended.