Cricket is a bat-and-ball game played between two teams of eleven players each on a cricket field, at the centre of which is a rectangular 20-metre (22-yard) pitch with a target at each end called the wicket (a set of three wooden stumps upon which two bails sit). Each phase of play is called an innings, during which one team bats, attempting to score as many runs as possible, whilst their opponents bowl and field, attempting to minimise the number of runs scored. When each innings ends, the teams usually swap roles for the next innings (i. e. the team that previously batted will bowl/field, and vice versa). The teams each bat for one or two innings, depending on the type of match. The winning team is the one that scores the most runs, including any extras gained. The nature of the game allows for certain results when neither team wins; a draw where a timed match has been completed with the team batting last still batting, even though one team has at that point scored more runs; a tie where both teams have scored exactly the same number of runs when the team batting last has completed its innings; and a no result where little or no play has been possible because of climatic or other conditions (usually rain or bad light ending play before the allotted balls have been completed).