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what is Duckworth–Lewis–Stern method (DLS) method in cricket

what is dls method in cricket

what is DLS method in cricket

The Duckworth Lewis Stern Method or DLS method(as it is known) is a system that used to calculate the target score in cricket matches affected due to rain. cricket has long searched for a fair way to calculate the winning side when inclement weather affects the limited-overs match as a result of the infamous situation from the 1992 World Cup semi-final.

Duckworth Lewis Calculator


DL Method Cricket Target Score Calculator


Why this method needed

The need for such a method was felt after South Africa lost a world cup semi-finals in 1992. South Africa was asked to score 22 off one ball against England in the semi-finals of the 1992 World Cup.

Devised by:- English statisticians Frank Duckworth and Tony Lewis 

1997:- The DLS method first was used in a match between Zimbabwe and England 

2014:- Australian academic steven stern updated the formula in 2014 and his name was added to the title 


How the DLS method Worked

what is dls method in cricket

The DLS method sets targets by calculating how runs teams should score (and would have scored) if the resources (wickets and overs) available both side equal  The original target was based on the availability of those resources.

How does it work

let’s look at an example if the team who batted first made 250 runs batting out their full 50 overs and the team batting second has made 195 runs for the loss of five batsmen after 40 overs when the rain stops play who is the winner the historic method used to nominate the winner before Duckworth Lewis was to simply calculate the average runs per over at the point where the match was stopped team 1 is the winner right not according to the Duckworth Lewis Stern method in the previous example DLS suggests that simply reducing the run target proportionally to the loss of overs is unfair to team two why because of this simple principle that the system is based around if team two new at the start of their innings that they would only have 40 overs to bat they would have batted more aggressively in the earlier part of their innings the DLS system recognizes that each team has two resources available with which to score runs batters who are yet to be dismissed and the number of overs remaining now we won’t go into the intricate detail of the calculations but the tables are based on the resources available for each team that is their overs remaining and their wickets in hand consider this extract from the DLS table after 40 overs team 2 still had 10 overs left and as they had only lost five batters they still had 5 wickets in hand so TLS states that by combining the number of overs remaining and the number of wickets left 27.5% of teams whose overall resources to score runs went unused hence the run-scoring resource is available to team two in their innings with 100% minus twenty-seven point five per cent equals seventy-two point five per cent team one scored two hundred and fifty so according to DLS team to target is revised to two hundred and fifty times point seven two five which equals one hundred and eighty-one point two five-team two scored one hundred and ninety-five runs therefore under DLS team two is the winner by 14 runs simple there is still one caveat for both ODI and t20 ice both sides must bat a minimum number of overs for a result to happen it’s 20 overs in ODI and five overs in t20 ice overall the Duckworth Lewis Stern method ensures that any limited-overs match that is affected by inclement weather reaches a fair conclusion. 

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