Leg before wicket (lbw) is one of the ways in which a batter can be dismissed in the sport of cricket. Following an appeal by the fielding side, the umpire may rule a batter out LBW if the ball would have struck the wicket but was instead intercepted by any part of the batsman's body (except the hand(s) holding the bat). The umpire's decision will depend on a number of criteria, including where the ball pitched, whether the ball hit in line with the wickets, the ball's expected future trajectory after hitting the batsman, and whether the batsman was attempting to hit the ball.
Leg before wicket first appeared in the laws of cricket in 1774, as batsmen began to use their pads to prevent the ball from hitting their wicket. Over several years, refinements were made to clarify where the ball should pitch and to remove the element of interpreting the batsman's intentions. The 1839 version of the law used a wording that remained in place for nearly 100 years. However, starting in the latter part of the 19th century, batsmen became increasingly expert at "pad-play" to reduce the risk of their dismissal. Following a number of failed proposals for reform, in 1935 the law was expanded, such that batters could be dismissed lbw even if the ball pitched outside the line of off stump. Critics felt this change made the game unattractive as it encouraged negative tactics at the expense of leg spin bowling.
