wolf and sheep on a chess board. the wolf is red and the sheeps are blue. the wolf starts the game and can move diagnostically forward or backwards. there are 4 sheeps who can move only diagnostically forward, one sheep every turn. the sheep's goal is to prevent the wolf's ability to move. the wolf's goal is to reach the sheep's side. none of the pieces can "eat" each other or move to a taken place. the valid moves are highlighted in green for the player to pick from. the pieces are moved with the computer's mouse.