About this Game Controls : Use mouse to click on the board where you want to place your disk. Available moves are marked by red dots. The game : Black always moves first. If on your turn you cannot outflank and flip at least one opposing disc, your turn is forfeited and your opponent moves again. A disc may outflank any number of discs in one or more rows in any number of directions at the same time - horizontally, vertically, or diagonally. (A row is defined as one or more discs in a continuous straight line). The game is over when it is no longer possible for either player to move. Reversi also known as Othello. Othello is a registered trademark of Tsukuda Original, licensed by Anjar Company, copyright 1973, 1990 Pressman Toy Corporation.