• No pencil or paper required.
• 81 thinking pieces. Any sudoku puzzle can be played on this board.
• With 9 pieces spare chess.The best way to train brain.
• The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called "boxes", "blocks", "regions", or "subsquares") contains all of the digits from 1 to 9.
• Makes a great board game gift for number-puzzle lovers.

No pencil or paper required.PP-NEST