Some are essentially identical to basketball, with only minor rules changes, while others are more distant and arguably not simple variations but distinct games.
Other variations include children's games, contests or activities intended to help the player practice or reinforce skills, which may or may not have a competitive aspect.
[citation needed] Korfball started in the Netherlands and is now played worldwide.
Points are scored by playing the ball through the net, as in basketball, though the point-scoring rules are modified.
The main differences from the parent sport is the court; below the padded basketball rim and backboard are four trampolines set into the floor which serve to propel players to great heights for slam dunks.
If a player fails to duplicate the shot, he or she acquires a letter, starting with H and moving rightward through the word "Horse".
If the players want a shorter or longer game, they can change the length of the word that dictates how many missed shots are needed to get eliminated.
In other versions a player gets a second try on their final shot before getting eliminated from the game, often called “Farmer’s Chance”.
The NBA All-Star Weekend H–O–R–S–E Competition was a contest in which players from the National Basketball Association played the game against each other.
Another technique is to throw the ball very hard at the ring to enable a difficult return for the next shooter.
The player continues to shoot until a basket is made to a maximum of 5 shots.
This player must make the basket in the same number, or fewer shots than the preceding shooter.
One player starts the game by shooting from the free throw line.
If you are eliminated, you stand off the court, at the foot of the basket, but you can still get back into the game.
If a player shoots an airball, you can get back in the game if you are the one to catch it before it touches the ground.
(For this rule, you do have to remain off the court when catching the airball so as not to be actively interfering in the game).
additional common rule: Around the World (sometimes called Around the Key) is a basketball variant played by 2 or more players, who have all agreed upon a turn order.
Others play such that those players who have yet to act on the turn get a chance to tie, which cancels any advantage of going first.
In theory, the shooting positions are arbitrary; in practice, they are most commonly ordered along the 3-point line in equal intervals starting from one of the sides of the basket and including the straight-on center shot (starting from 30°, 60°, 90°, 120°, 150°, and 180° along the 3-point line with 90° being the center).
Sometimes the game is played such that a missed shot requires the player to start over at the first position.
At this point a player may save his position or elect to take another "chance" shot.
If it misses, the player's turn ends and they suffer some penalty, perhaps regressing a position or even starting over.
Knockout, sometimes called Lightning, Bump, Gotcha, Bumpout, Tornado, Speed, or Killer is played by two or more players and requires two basketballs.
If they miss, they rebound the ball and continue shooting until they make a goal.
Typically a new game starts with all players wanting at that time to play lining up at the same shooting point.
Each match is played following normal one-on-one rules, including violations (such as fouls and out-of-bounds) to just one point.