Innings closed

An innings is closed when:

1. Ten of the eleven batsmen are out (have been dismissed); in this case, the team is said to be "all out"
2. The team has only one batsman left who can bat, one or more of the remaining players being unavailable owing to injury, illness or absence; again, the team is said to be "all out"
3. The team batting last reaches the score required to win the match
4. The predetermined number of overs has been bowled (in a one-day match only, most commonly 50 overs; or 20 in Twenty20)
5. A captain declares his team's innings closed while at least two of his batsmen are not out (this does not apply in one-day limited over matches)

Results

If the team that bats last is all out having scored fewer runs than their opponents, the team is said to have "lost by n runs" (where n is the difference between the number of runs scored by the teams). If the team that bats last scores enough runs to win, it is said to have "won by nwickets", where n is the number of wickets left to fall. For instance a team that passes its opponents' score having only lost six wickets would have won "by four wickets".

In a two-innings-a-side match, one team's combined first and second innings total may be less than the other side's first innings total. The team with the greater score is then said to have won by an innings and n runs, and does not need to bat again: n is the difference between the two teams' aggregate scores.

If the team batting last is all out, and both sides have scored the same number of runs, then the match is a tie; this result is quite rare in matches of two innings a side. In the traditional form of the game, if the time allotted for the match expires before either side can win, then the game is declared a draw.

If the match has only a single innings per side, then a maximum number of deliveries for each innings is often imposed. Such a match is called a "limited overs" or "one-day" match, and the side scoring more runs wins regardless of the number of wickets lost, so that a draw cannot occur. If this kind of match is temporarily interrupted by bad weather, then a complex mathematical formula, known as the Duckworth-Lewis method after its developers, is often used to recalculate a new target score. A one-day match can also be declared a "no-result" if fewer than a previously agreed number of overs have been bowled by either team, in circumstances that make normal resumption of play impossible; for example, wet weather.

Weather

Cricket is a sport played predominantly in the drier periods of the year. But, even so, the weather is a major factor in all cricket matches.

A scheduled game of cricket cannot be played in wet weather. Dampness affects the bounce of the ball on the wicket and is a risk to all players involved in the game. Many grounds have facilities to cover the cricket pitch (or the wicket). Covers can be in the form of sheets being laid over the wicket to elevated covers on wheels (using the same concept as an umbrella) to even hover covers which form an airtight seal around the wicket. However, most grounds do not have the facilities to cover the outfield. This means that in the event of heavy bouts of bad weather, games may be cancelled, abandoned or suspended due to an unsafe outfield.

Another factor in cricket is the amount of light available. At grounds without floodlights (or in game formats which disallow the use of floodlights), umpires can stop play in the event of bad light as it becomes too difficult for the batsmen to be able to see the ball coming at them, (and in extreme cases, members of the fielding team).

On the other hand, in instances of good light, batsmen can utilize sight-screens which enable batsmen to have a white background against which they can pick out the red ball with greater ease.

The umpires always have the final decision on weather related issues.

Types of matches

Cricket is a multi-faceted sport which, in very broad terms, can be divided into major cricket and minor cricket based on playing standards. A more pertinent division, particularly in terms of major cricket, is between matches in which the teams have two innings apiece and those in which they have a single innings each. The former, known as first-class cricket, has a duration of three to five days (there have been examples of "timeless" matches too); the latter, known as limited overs cricket because each team bowls a limit of typically 50 overs, has a planned duration of one day only (a match can be extended if necessary due to bad weather, etc.).

Typically, two-innings matches have at least six hours of playing time each day. Limited overs matches often last six hours or more. There are usually formal intervals on each day for lunch and tea with brief informal breaks for drinks. There is also a short interval between innings. Historically, a form of cricket known as single wicket has been extremely successful and many of these contests in the 18th and 19th centuries qualify as major cricket matches. In this form, although each team may have from one to six players, there is only one batsman at a time and he must face every delivery bowled while his innings lasts. Single wicket has rarely been played since limited overs cricket began.