Shipping weight: 1.25 pounds (Size: 10.00" H x 10.00" W x 2.00" D)
Black Box is a puzzle game in which one player creates a puzzle by secretly choosing the positions of 4-5 marbles on a 8x8 grid. The other player tries to guess their positions by shooting 'rays' into the grid and seeing how they bounce around. The player requiring the fewest rays to solve a puzzle wins.
This description provided by BoardGameGeek.com, the best source for board game information on the web!