The Chase, as defined in Law 9.1, is the procedure by which players gain or lose the Service Side. When a Chase is made, the score in strokes is unaltered but that Chase is marked and played for when the players change ends. The players change ends when two Chases are made or when one chase is made and the score of any player is forty or advantage. When the players have changed ends, the Chases are played for in the next one or two (as the case may be) Rests in the order in which they were made. Once those Chases have been played for, the game continues normally.
9.1 Definitions Relating to Chases
Better than One Chase is Better than another if it is made nearer to the Back Wall on the same side of the Court. In marking Chases, “Better than” means that the ball makes a Chase:
(a) nearer to the Back Wall than the line mentioned; and
(b) nearer to that line than to any other yard or Gallery line.
Chase A Chase is made whenever the ball Falls in the Hazard Court, or Falls anywhere on the Service Side, or enters the Line Opening or any Gallery, except the Winning Gallery.
Chase the Line The Chase made when the ball enters the Line Opening. On the floor it is the area between the Net and the First Gallery Line excluding that line. A ball which Drops on the Service Side and then Falls on the Hazard Side is also marked Chase the Line.
Hazard Chase A Chase made on the Hazard Side of the Court.
Hazard Chase the Line The Chase made when the ball enters the Line Opening on the Hazard Side. On the floor it is the area between the Net and Hazard the First Gallery Line, excluding that line. A ball which Drops on the Hazard Side and then Falls on the Service Side is also marked Hazard Chase the Line
Marking a Chase A Chase is marked at the point where the ball Falls.
Worse than One Chase is Worse than another if it is made further away from the Back Wall on the same side of the Court. In marking Chases, “Worse than” means that the ball makes a Chase:
(a) further away from the Back Wall than the line mentioned; and
(b) nearer to that line than to any other Yard or Gallery line.
9.2 Making Chases:
(a) When no Chase is being played for, a Chase is made if the ball, whilst In Play, enters the Line Opening or any Gallery (except the Winning Gallery) or Falls on the floor of the Court anywhere on the Service Side or within the Hazard Court. When a Chase is made the score in strokes relating to that Rest shall be unaltered until that Chase is played for (Law 9.3).
(b) A Chase is made at the Line Opening or Gallery which the ball enters or at the Chase Line on which it Falls, provided that if the ball Falls between two Chase Lines, it makes a Chase Better than or Worse than the yard or Gallery line nearest the spot where it Fell, except that:
(i) it makes chase Better than Half-a-Yard or Better than Hazard Half-a-Yard when it so Falls;
(ii) when it Falls Better than or Worse than the Chase Line which is A Yard Worse than the Last Gallery, the Chase is called “Nearly a Yard Worse than the Last Gallery” or “More than a Yard Worse than the Last Gallery” as applicable;
(iii) when it Falls Worse than the First Gallery Line or the Hazard First Gallery Line it makes Chase the Line or Hazard Chase the Line, as applicable;
(iv) when it Drops or Falls in the Net on the opposite side of the Court from the Striker, or Drops on that opposite side and then Falls on the side from which it was last struck, it makes Chase the Line on the opposite side from the Striker,
(v) when it Drops or Falls on another ball or other item on the floor (not being a player’s racket or any item of a player’s clothing or equipment used or carried by that player in the course of that Rest), it makes a Chase as if it had Fallen where that ball or item was lying.
(vi) when it strikes the Marker, having previously passed the Net, it makes a Chase as if it had Fallen where the Marker was situate at the time of impact.
9.3 Playing Chases
(a) When the players change sides in accordance with Law 8.2 the Chase or Chases shall be played for immediately in the order in which they were made. The winner of each Chase shall win the point. Unless there is a Let (law 10) a Chase shall be played for once only.
(b) When a Chase is being played for:
(i) the opponent of the player who made the Chase (being the Server in the case of a Hazard Chase and the Receiver in each other case) is said to be “Attacking the Chase”. The player who made the Chase is said to be “Defending the Chase”;
(ii) the player Attacking the Chase wins the Chase if he makes a Better Chase or loses the Chase if he makes a Worse Chase, in either case than the one being played for, or
(iii) if that Chase is on the Service Side; the player on the Hazard Side will lose the Chase to a Chase made on the Hazard Side; or
(iv) if that Chase is on the Hazard Side; the player on the Service Side will lose the Chase to a Chase made on the Service Side; or
(v) if a player loses the point in accordance with Law 11.2, the Chase is annulled and that Law shall apply, or
(vi) if the player Attacking the Chase makes a Chase equal to the one being played for it is Chase Off and the score remains unaltered.
(c) In cases where it is thought that a Chase may have been wrongly called or there has been a misunderstanding or a mistake:
(i) if it is thought that a Chase has been wrongly called by the Marker, the Server may appeal before delivering the Service, and the Receiver may appeal before attempting to take it. If there is no such appeal, the Chase played for shall be that called by the Marker immediately before the Service is delivered, notwithstanding that this may be different from that marked when the Chase was made; or
(ii) if there has been any misunderstanding as to what Chase the Marker called, the Rest as played shall stand or a Let (Law 10) may be allowed, whichever the Marker considers equitable in view of all the circumstances; or
(iii) if through any mistake, at the end of a game there is a Chase that has been made and not played for, that Chase is annulled.