The official American Cornhole Association rules and regulations can be found at www.playcornhole.org.

Rules

 

The two boards should be 27 feet apart from the front of one board to the front of the other board

Each player or team should use 4 bags of the same color.

If two people are playing, each player should alternate tosses until all 8 bags have been thrown, and then walk to to the other board. 

If four people are playing, teammates stand across from each other and use the same color bags

All 8 bags should begin at the same board

All players must throw from behind the front of the board where they are standing

Game continues by alternating throws between the two opponent players until all 8 bags have been thrown

The player or team who wins the round is given honors to throw first in the next round

Scoring goes as follows:

1 point for a bag on the board
3 points for a bag in the hole
0 points for a bag that lands off the board

If a bag hits the ground then bounces up onto the board then that bag should be taken off the  playing surface before any more bags are thrown

The points cancel each other out.  Example: If team A gets 2 bags on the board and 1 bag in the hole (5 points) and team B gets 3 bags on the board and 1 bag in the hole (6 points) team B would get 1 point

The game continues until one team reaches 21 or more points, and you do not have to win by 2 points