# Rule 20 (A.A.U. Four-Wall Rules, 1923, historical)

> **Historical rulebook: not the current rules.** The current rules are here: https://handball.theperfectship.com/rules/four-wall/

Every player is entitled to a free and unobstructed opportunity to play the ball. If he is interfered with unintentionally it is called a hinder and is played over.

## Mentioned here

- [Player](https://handball.theperfectship.com/player.md)
- [Hinder](https://handball.theperfectship.com/hinder.md)
- [Ball](https://handball.theperfectship.com/ball.md)

How this rule changed: [wording in every rulebook](https://handball.theperfectship.com/rulebooks/clause-history/code-fourwall-american/19.md)

## Relationships

- Player relates to Hinder: mentioned together in 7 sub-rules.
- Player relates to Ball: mentioned together in 11 sub-rules.
- Hinder relates to Ball: mentioned together in 5 sub-rules.

Rulebook: [A.A.U. Four-Wall Rules, 1923](https://handball.theperfectship.com/rulebooks/aau-fourwall-1923.md)

Source: Spalding's Official Handball Guide, 1923, ed. Robert L. Ripley (Library of Congress, LCCN 23002979), pp. 69-72; also printed in the Official Handbook of the A.A.U., 1923, section LXI. Public domain.