Level playing field is a concept about justness, not that each player has an equal chance to ensure, but that they all play by a similar set of rules. In a game played on a playing field, including rugby, one team would’ve an unfair advantage should the field had any slope. Since some real-life playing fields have slopes, it can be customary for groups to swap ends from the playing field in half time. A metaphorical playing field is considered to be level if not any external interference affects the flexibility of the people to compete pretty.