Final answer:
If an opponent moves the playing service or net in a sport such as table tennis, they could forfeit a point due to violating official rules. The rules ensure fair play by maintaining a stable playing surface and properly fixed net. An unexpected move in general competition can also prevent engagement, similar to a strategy in warfare or sports.
Step-by-step explanation:
If your opponent moves the playing service or net during a game, they are violating the rules of the sport. In table tennis, for example, this could result in a point being awarded to the other player. According to the official rules set by the International Table Tennis Federation (ITTF), the playing surface must remain stationary throughout the duration of the match, and the net must be fixed in a certain way that does not allow for movement. If an opponent deliberately or accidentally moves the playing surface or net, it disrupts the fairness and integrity of the game.
In contexts beyond sports, the quotation you provided suggests a strategy to prevent an enemy from engaging by doing something unexpected or confusing. This concept, although not directly related to the rules of a sport, highlights the importance of maintaining an element of surprise or unorthodox tactics in competitive situations.