Leg before wicket, commonly abbreviated to LBW, is a method of dismissal in cricket in which the striker is out because the ball from the bowler strikes the batter's person rather than the bat and satisfies a specific set of conditions defined by the Laws of Cricket. Despite the name, the batter does not necessarily have to be struck on the leg, because any part of the body other than the hand holding the bat can potentially be involved.
The dismissal is designed to prevent a batter from deliberately using the body to block a ball that would otherwise have been capable of hitting the wicket. LBW is one of the most technically detailed forms of dismissal because the umpire must consider where the ball pitched, whether it struck the batter in line with the wickets, whether the batter was attempting a genuine stroke, and whether the ball would have hit the wicket.
For an LBW decision to be valid, the ball must normally first pitch either in line between wicket and wicket or on the off side of the striker's wicket, subject to the specific provisions of the Laws. The ball must not have pitched entirely outside the leg stump line before striking the batter.
The batter must then be struck by the ball without the ball first touching the bat, although the detailed law also defines how bat and person contact is assessed. The point of impact is important, but its relevance depends on whether the batter was genuinely attempting to play the ball. The umpire must establish the sequence of events accurately because a tiny difference in where the ball pitched or struck the batter can change the legal outcome.
The distinction between a genuine attempt to play the ball and no genuine attempt is central to LBW. Where the striker has made a genuine attempt to hit the ball with the bat, the impact generally needs to satisfy the relevant in line requirements. Where the striker has made no genuine attempt to play the ball with the bat, the law applies a different criterion concerning the location of impact.
This distinction prevents a batter from gaining a legal advantage by simply making or avoiding a stroke depending on which interpretation produces the safest outcome. Modern batters also use pads and defensive techniques that make these distinctions important. The umpire must judge the batter's action as part of the circumstances of the delivery rather than merely looking at where the ball eventually would have gone.
The final major requirement is that the ball would have hit the wicket if the batter had not been there, subject to the precise provisions of the law. This is why LBW decisions can be difficult for an on field umpire. The umpire observes the actual impact but must determine a hypothetical trajectory after impact, effectively asking where the ball would have gone. Factors include the ball's angle, speed, swing, seam movement, spin, bounce and the position of the batter. Umpires traditionally make this judgement using observation and experience, while modern international cricket can use ball tracking technology as part of the Decision Review System. The technology estimates the ball's path but still operates within technical assumptions and margins of uncertainty.
LBW is closely connected with cricket's distinction between the bat and the body. The law generally permits a batter to use the bat to intercept the ball but restricts the use of the body in circumstances where the delivery would otherwise have threatened the wicket. The batter's feet and body position can therefore have substantial tactical importance.
Moving across the crease can alter the line of impact and potentially change the legal assessment, while playing forward or back can affect where the ball pitches and where it strikes. Spin bowling makes these judgements especially complex because a delivery can change direction after pitching. Fast bowlers can create LBW opportunities through swing, seam movement and deliveries that straighten after appearing to move away from the batter.
An LBW appeal must be made by the fielding side because the umpire does not normally initiate the dismissal independently without an appeal. The umpire then decides whether the legal conditions have been satisfied. If the decision is not out, the fielding side may have an opportunity to review it in competitions using the Decision Review System, subject to the applicable review rules.
Technology can assist with determining pitching location, impact location and predicted trajectory, but the exact review process depends on the competition's playing conditions. The system is not simply a recording of reality because trajectory prediction involves technological models and tolerances. The combination of human umpiring and technological review is intended to improve decision accuracy while preserving the legal framework of the game.
LBW should be distinguished from a bowled dismissal because in an LBW the ball does not actually have to hit the wicket. Instead, the batter's body prevents the ball from reaching the wicket and the legal conditions establish that the wicket would otherwise have been struck. It also differs from a caught dismissal because the ball does not need to be caught by a fielder after touching the batter.
The term leg before wicket reflects the historical logic of the law, but the modern rule is more precise than the literal phrase suggests. The hand holding the bat is legally treated as part of the bat for relevant purposes, which is another reason why the exact contact sequence matters when determining whether the batter has been struck in a legally dismissible manner.
LBW is strategically important because bowlers can deliberately target the pads when they believe the ball is likely to strike the batter in a legally relevant area and continue towards the stumps. Batters respond by controlling footwork, playing with the bat in front of the pad, judging swing and spin, and positioning themselves to reduce the probability of an LBW decision.
Umpires must make rapid judgements involving several separate legal questions, which explains why LBW remains one of cricket's most technically discussed dismissals. Understanding it requires considering pitching position, impact position, attempted stroke, predicted trajectory, bat and body contact, appeals and review procedures. It is therefore not simply a rule against being hit on the leg, but a carefully defined mechanism for determining whether the batter has illegally prevented a delivery from hitting the wicket with the body.
