Spack is a two-player game for the Shibumi set. The board is initially empty. Each player ownes 24 balls (8 white, 8 black, 8 red) Players take turns adding one of their balls. Under certain conditions, they can return balls to their supply too. The game ends, as soon as a player can´t make a legal move. The winner is determined by the number of balls, the players have left. Spack is an entry in the Shibumi Challenge.