 Generally, the rules entitle players to a direct straight line access to the ball, room for a reasonable swing and an unobstructed shot to any part of the front wall.When interference occurs, a player may appeal for a "let" and the referee (or the players themselves if there is no official) then interprets the extent of the interference.The referee may allow a let and the players then replay the point, or award a "stroke" to the appealing player (meaning that he is declared the winner of that point) depending on the degree of interference, whether the interfering player made an adequate effort to avoid interfering, and whether the player interfered with was likely to have hit a winning shot had the interference not occurred.