Othello error (sometimes called porpoising) is a problem that can happen when you're playing a game called Othello. This game is a two-player strategy game, where you and your opponent take turns placing your colored pieces (or disks) on the board. The goal is to get more of your pieces on the board than your opponent.
When othello error happens, it means that the game isn't playing fair and your pieces start moving around faster and faster, without you or your opponent controlling them. They start jumping all over the place, just like a porpoise jumping out of the water! This can make it very hard to keep track of who is winning the game. Othello error can be very frustrating and can ruin the game if it isn't fixed.