Othello Hard

Controls Goal: finish with more of your discs (black) on the board than the computer (white). You move first. Trap opponent discs between your own (horizontally, vertically or diagonally) and the whole line flips; you can only play on the cells marked with a dot. If you have no legal move your turn is skipped automatically; the game ends when neither side can move or the board is full. Only wins are recorded, and the bigger the final disc difference (your discs − the computer's) the higher you rank. Controls: click or tap a dotted cell. On a keyboard move between cells with the arrow keys (Tab stops on the board only once) and place with Enter or Space. Tips: the four corners can never be flipped, so they are the most valuable; the cells next to a corner tend to give it away, so avoid them. Reducing the opponent's moves is stronger than flipping many discs. There is no time limit and no pause.