Professional foul stop the clock and get the ball back, rather than allow the opponent to run out the clock. In addition, there are specific rules governing obvious goal scoring opportunities called clear path fouls. The professional foul in rugby league embodies a similar concept to other sports, a deliberate breach of the rules in order to prevent a scoring opportunity. The penalty for this offence is 10 minutes in the sin bin. The majority of professional fouls are either holding down the tackled player after a break has been made in order to allow his teammates to reform in defence, interfering
First-move advantage in chess advantage of the first move has some similarities with the serve in tennis in that White can score an 'ace' (for instance with a powerful ), he has more control over the pace and direction of the game, and he has a 'second serve' in that when things go wrong his position is not usually losing." Second, White begins the game with some initiative, although Rowson regards this as a psychological rather than a positional advantage, "and whether it leads to a positional advantage depends on the relative skill of the players." Third, some players are able to use the