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A One-Day International (ODI) is a form of limited overs cricket, played between two teams with international status, in which each team faces a fixed number of overs, usually 50. The Cricket World Cup is played in this format, which is generally held every four years. One-Day International matches are also called Limited Overs Internationals (LOI), although this generic term may also refer to Twenty20 International matches. They are major matches and considered the highest standard of List A, limited overs competition.
The international one-day game is a late-twentieth-century development. The first ODI was played on 5 January 1971 between Australia and England at the Melbourne Cricket Ground. When the first three days of the third Test were washed out officials decided to abandon the match and, instead, play a one-off one-day game consisting of 40 eight-ball overs per side. Australia won the game by 5 wickets. ODIs were played in white kits with a red ball.
In the late 1970s, Kerry Packer established the rival World Series Cricket competition, and it introduced many of the features of One Day International cricket that are now commonplace, including coloured uniforms, matches played at night under floodlights with a white ball and dark sight screens, and, for television broadcasts, multiple camera angles, effects microphones to capture sounds from the players on the pitch, and on-screen graphics. The first of the matches with coloured uniforms was the WSC Australians in wattle gold versus WSC West Indians in coral pink, played at VFL Park in Melbourne on 17 January 1979. This led not only to Packer's Channel 9 getting the TV rights to cricket in Australia but also led to players worldwide being paid to play, and becoming international professionals, no longer needing jobs outside cricket. Matches played with coloured kits and a white ball became more commonplace over time, and the use of white flannels and a red ball in ODIs ended in 2001.
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In the main the Laws of cricket apply. However, in ODIs, each team bats for a fixed number of overs. In the early days of ODI cricket, the number of overs was generally 60 overs per side, and matches were also played with 40, 45 or 55 overs per side, but now it has been uniformly fixed at 50 overs.
Simply stated, the game works as follows:
Where a number of overs are lost, for example, due to inclement weather conditions, then the total number of overs may be reduced. In the early days of ODI cricket, the team with the better run rate won (see Average Run Rate method), but this favoured the second team. For the 1992 World Cup, an alternative method was used of simply omitting the first team's worst overs (see Most Productive Overs method), but that favoured the first team. Since the late 1990s, the target or result is usually determined by the Duckworth-Lewis (DL) method, which is a method with statistical approach. It takes into consideration the fact that the wickets in hand plays a crucial role in pacing the run-rate. In other words, a team with more wickets in hand can play way more aggressively than the team with fewer wickets in hand. When insufficient overs are played to apply the Duckworth-Lewis method, a match is declared no result. Important one-day matches, particularly in the latter stages of major tournaments, may have two days set aside, such that a result can be achieved on the "reserve day" if the first day is washed out—either by playing a new game, or by resuming the match which was rain-interrupted. The original DL-method however had a few inherent flaws. For example, Tony Lewis, one of the formulators of this method recognized after the match between India and Kenya during the 1999 World Cup held in Bristol, that the original method gave an unfair advantage to the team chasing scores above 350 runs in a 50 overs match (and likewise scores in other formats). Hence, the method was revised and a new version was released in 2004. There was one more such change made which was first implemented on 2009. Off late (as up to 9 August 2018), the Duckworth-Lewis-Stern (DLS) method is widely used, which is a modification of the DL-Method suggested by Prof. Steven Stern. It was first implemented during the 2015 World Cup. One of the major changes made to DLS from DL method was based on a historic analysis by Prof. Stern that a team with higher run rate in their initial stages has a greater chance to get to a high score than a team with slow initial run rate, but more wickets in hand.
Because the game uses a white ball instead of the red one used in first-class cricket, the ball can become discoloured and hard to see as the innings progresses, so the ICC has used various rules to help keep the ball playable. Most recently, ICC has made the use of two new balls (one from each end), the same strategy that was used in the 1992 and 1996 World Cups so that each ball is used for only 25 overs. Previously, in October 2007, the ICC sanctioned that after the 34th over, the ball would be replaced with a cleaned previously-used ball. Before October 2007 (except 1992 and 1996 World Cups), only one ball would be used during an innings of an ODI and it was up to the umpire to decide whether to change the ball.
The bowling side is subjected to fielding restrictions during an ODI, in order to prevent teams from setting wholly defensive fields. Fielding restrictions dictate the maximum number of fieldsmen allowed to be outside the thirty-yard circle.
Under current ODI rules, there are three levels of fielding restrictions:
Where a match is shortened by rain, the duration of the powerplays is adjusted to equal 30% of the team's overs wherever possible (20% for the first powerplay, 10% for the second).
Fielding restrictions were first introduced in the Australian 1980–81 season. By 1992, only two fieldsmen were allowed outside the circle in the first fifteen overs, then five fieldsmen allowed outside the circle for the remaining overs. This was shortened to ten overs in 2005, and two five-over powerplays were introduced, with the bowling team having discretion over the timing for both. In 2008, the batting team was given discretion for the timing of one of the two powerplays. In 2011, the teams were restricted to completing the discretionary powerplays between the 16th and 40th overs; previously, the powerplays could take place at any time between the 11th and 50th overs. Finally, in 2012, the bowling powerplay was abandoned, and the number of fielders allowed outside the 30-yard circle during non-powerplay overs was reduced from five to four.
The trial regulations also introduced a substitution rule that allowed the introduction of a replacement player at any stage in the match and until he was called up to play he assumed the role of 12th man. Teams nominated their replacement player, called a Supersub, before the toss. The Supersub could bat, bowl, field or keep wicket once a player was replaced; the replaced player took over the role of 12th man. Over the six months it was in operation, it became very clear that the Supersub was of far more benefit to the side that won the toss, unbalancing the game. Several international captains reached "gentleman's agreements" to discontinue this rule late in 2005. They continued to name Supersubs, as required, but they did not field them by simply using them as a normal 12th man. On 15 February 2006, the ICC announced their intention to discontinue the Supersub rule on 21 March 2006.
The International Cricket Council (ICC) determines which teams have ODI status (meaning that any match played between two such teams under standard one-day rules is classified as an ODI).
The twelve Test-playing nations (which are also the twelve full members of the ICC) have permanent ODI status. The nations are listed below with the date of each nation's ODI debut after gaining full ODI status shown in brackets (Sri Lanka, Zimbabwe, Bangladesh, Ireland, and Afghanistan were ICC associate members at the times of their ODI debuts):
Between 2005 and 2017 the ICC granted temporary ODI status to six other teams (known as Associate members). In 2017 this was changed to four teams, following the promotion of Afghanistan and Ireland to Test status (and permanent ODI status). The ICC had previously decided to limit ODI status to 16 teams. Teams earn this temporary status for a period of four years based on their performance in the ICC World Cup Qualifier, which is the final event of the ICC World Cricket League. In 2019, ICC increased the number of teams holding Temporary ODI status to eight. The following eight teams currently have this status (the dates listed in brackets are of their first ODI match after gaining temporary ODI status):
Six additional teams previously held temporary ODI status before either being promoted to Test status or relegated after under-performing at the World Cup Qualifier:
The ICC occasionally granted associate members permanent ODI status without granting them full membership and Test status. This was originally introduced to allow the best associate members to gain regular experience in internationals before making the step up to full membership. First Bangladesh and then Kenya received this status. Bangladesh have since made the step up to Test status and full membership; but as a result of disputes and poor performances, Kenya's ODI status was reduced to temporary in 2005, meaning that it had to perform well at World Cup Qualifiers to keep ODI status. Kenya lost ODI status after finishing in fifth place at the 2014 Cricket World Cup Qualifier event.
The ICC can also grant special ODI status to all matches within certain high-profile tournaments, with the result being that the following countries have also participated in full ODIs, with some later gaining temporary or permanent ODI status also fitting into this category:
Finally, since 2005, three composite teams have played matches with full ODI status. These matches were: