Here rules of the game for cornhole:

SCORINGA bag in-the-hole or hole-in: 3 points — When a bag is thrown through the hole in the platform or otherwise comes to rest inside the platform, such as being knocked in by another playerBag in-the-count: 1 point — A corn bag that is not in-the-hole but lands with any portion of the bag resting on the platform is in-the-count, sometimes called on-the-board. For a corn bag to be in-the-count, it must not touch the ground or any other portion of the court prior to coming to rest on the cornhole platform. If a corn bag touches the ground before stopping on the cornhole platform, it is a foul and must be removed from the platform prior to the continuation of play.Bag out-of-the-count: 0 points — A bag that stops anywhere except in-the-count or in-the-hole is out-of-the-count. A bag that is declared to be a foul is considered to be out-of-the-count, no matter where it comes to rest, and must be removed from the surface before continuing play.

LENGTH OF THE GAMEThe match is played until the first team reaches or exceeds 21 points at the end of an inning. The winning team does not need to win by two or more points.A match can never end in the middle of an inning. So, if a team that pitches first reaches or exceeds 21 points, the game cannot end until the other side is allowed to pitch all of its bags and the inning is completed.If the match is tied at 21 or more at the end of an inning, play continues until one team or the other achieves a higher score at the end of an inning and wins the match.The game is played to 21 unless a team scores seven or more points at the end of an inning before their opponents score any points. In this case the game is a skunk and the team that scores seven or more points wins the match.

Source: American Cornhole Association, www.playcornhole.org