Players may not step over the foul line or outside of the pitcher's box while pitching. Each player must deliver the bag within twenty seconds. The time starts when the player steps onto the pitcher's box with the intention of pitching. The player who scored in the preceding frame pitches first in the next frame. If neither player scores, the player who pitched first in the preceding inning pitches first in the next inning. Note: No foot can land past the front of the board until the bag leaves the hand, otherwise the point does not count. Cornhole can be played as singles, doubles, or crew format (4 players to a team). In doubles play, four players split into two teams. One member from each team pitches from one board and the other members pitch from the other. The first side of players alternate pitching bags until both players have thrown all four of their bags, then the players pitching from the opposing cornhole board continue to alternate in the same manner until all four of their bags are delivered and the inning or frame is completed. In singles play, two players play against each other. Delivery is handled in the same manner as doubles play. Both contestants pitch from the same cornhole board and alternate their pitches until all of their bags have been pitched, completing the inning or frame. In crew format, each end of the board consists of two players from each team, with eight total players (4 per team). Players will throw two bags each per frame, still in alternating fashion. In order to score, the bags must either be tossed into the hole or land on the board. A bag that falls through the hole is worth three points. The bag can be tossed directly into the hole, slide into the hole, or be knocked into the hole by another bag. A bag that lands on the board and is still on the board at the end of the inning is worth one point. If a bag touches the ground and comes to rest on the board, it is removed from the board prior to continuation of play and not worth any points (commonly referred to as a "dirt bag"). Scoring is done by cancellation (e.g., if Team A scores 12 points in the frame and Team B scores 10 points in the frame, Team A is awarded 2 points). Play continues until a player or team reaches or exceeds 21 points. In the common version of cancellation scoring, the total score for each team for the inning is totaled each round, and then the difference of the two scores is awarded to the team with the higher score.