The rules of pick and roll in basketball.
Cover refers to trying to delay or prevent an opponent without the ball from reaching the position he wants to reach on the field.
1. Legal cover refers to covering a player against an opponent;
1. When contact occurs, it is stationary (in a cylinder).
2. When contact occurs, stand on the ground with your feet.
Two: illegal cover refers to protecting players from opponents' attacks under the following circumstances.
1. When contact occurs, it is in motion.
2. When the stationary opponent is hiding out of sight, don't consider giving him enough space for contact.
3. When shielding a moving opponent, contact will occur regardless of time and space.
If the shield is placed in the field of vision (front or side) of a stationary opponent, it can be as close to the opponent as possible as long as it does not touch. If the stationed opponent is out of sight to cover, he must have a normal space for further movement with the opponent to avoid contact.
If the opponent is moving, you must consider time and space. The player who sets the cover must leave enough space for the opponent to stop or change direction to avoid. Considering the space, it is not less than the normal 1 and not more than the normal 2 steps. Players should provide legal cover and their opponents should be responsible for any contact.
Extended data:
Matters needing attention in judgment
1, defining the technical requirements of shielding and distinguishing between legal shielding and illegal shielding are the primary conditions for judging the nature of shielding offensive foul.
2. Strict division of labor in the referee law. Whether the referee or the referee is following, it is necessary to see the whole process of the cover of the attacking player and the cover of the defending player destroying the area, especially the cover between the no-ball zone cover, the moving cover and the continuous cover. Because there are many covers in the no-ball zone, the cover speed is faster during the travel, and the continuous cover changes greatly, which brings great difficulties to the referee's penalty on the spot.
More importantly, some on-site referees sometimes focus on the ball or attractive games, often ignoring the no-ball zone cover, moving cover and continuous cover. This is one of the reasons for offensive and defensive fouls.
4. On-the-spot referee should attach great importance to the center's "suspension" near the restricted area and the offensive foul when the center turns to block the net with his body.
Encyclopedia-cover foul