The goal of Reversi (also called Othello) is to fill the board with as many discs of your color as possible. You may place a disc anywhere on the board, as long as it surrounds at least one of your opponent’s discs on opposite sides. You can surround discs horizontally, vertically, or diagonally. After you place your disc, any discs that you surrounded will flip over to your color. At the end of the game, if you have more discs of your color than your opponent, you win!