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Frank Duckworth (bespectacled) with Tony Lewis.
DLS Method…you must have heard this word many times during cricket matches. It is used to determine the results of international cricket matches affected by rain. Frank Duckworth, who discovered this method, died on Tuesday. He was 84 years old.
England’s statistician Duckworth, along with Tony Lewis, discovered this method in 1997, which was adopted by the International Cricket Council (ICC) for the first time on 1 January 1997 in the match between Zimbabwe and England. Zimbabwe won this match by 7 runs. After that it was fully implemented during the 1999 ODI World Cup. Tony Lewis also passed away 4 years ago.
On Tuesday morning, Afghanistan reached the semi-finals of the T20 World Cup by defeating Bangladesh by 8 runs under the same DSL method.
Afghanistan captain Rashid Khan and other players celebrating after defeating Bangladesh by 8 runs.
BCCI first rejected, then adopted
This method was used for the first time in India in 2006. Initially BCCI had opposed this method, then adopted it. In India, this rule was used in the match between India and Pakistan in 2006.
In this ODI match, the Indian team was all out after scoring 328 runs, while Pakistan scored 311 runs after losing seven wickets in 47 overs. Meanwhile the match had to be stopped and Pakistan was declared the winner under the Duckworth-Lewis rule.
Let us tell you that in 2008, the match between India and England was reduced to 22 overs due to rain. In this match, India had scored 166 runs for 4 wickets, while England was given a target of 198 runs by applying Lewis rule, but it managed to score only 171 runs and even then lost.
DSL method was first implemented in India’s match in 2007, which was won by Pakistan by 7 runs.
Name changed in 2015, from DL to DLS
In the year 2015, the Duckworth Lewis formula was changed to the Duckworth Lewis Stern formula. Duckworth and Lewis’s research was complemented by research conducted by Professor Steve Stern of the University of Queensland, which found that teams were more likely to conserve wickets early in the chase as well as score more runs. Has been done, which became important after the start of T20 matches. After this it came to be called DLS method instead of DL.
This method is three-dimensional
This method is three-dimensional, its calculation is based on runs, wickets and overs. Meaning, based on the runs scored by the first team in the first innings, Z runs should be scored on Y wickets in X overs.
The essence of Duckworth-Lewis law is resource. The ability of a team to score runs at any time during a cricket match depends on two things, firstly, how many overs or balls are there and how many wickets are there with it. On the basis of these 2 resources, teams try to score as many runs as possible.
The most important figure to set targets for the second team is the final score of the first team. It also matters how many overs the first team has scored at the loss of how many wickets.
Calculation is based on resources
- Due to rain, 2 teams have only 90% resources left. Out of that, the first team has scored 254 runs using 100 percent resources (i.e. losing 10 wickets in 50 overs). In such a situation, to win, the second team will have to score 90% of the runs in 90% of the overs compared to the first team.
- The other team will have the target of scoring 229 runs in 45 overs. The score will be equal at 228 runs. Even the other team will have 10 wickets, in such a situation, in the beginning it is only a matter of runs and overs, the wickets are constant, but while chasing the target, the target also changes as the wickets fall.
- This is the basic way the Duckworth-Lewis rule works, but computerized data and formulas are used for more close calculations. That calculation cannot be done using normal mathematical formulas because Duckworth-Lewis never made many of the data of his research public and he also has a patent for it. In such a situation, this calculation cannot be done without official software.
