Written by: OCB Team • 21.05.2025
If you’ve ever watched a rain-affected cricket match and suddenly seen a team chasing a strange new target, you’ve already witnessed the DLS method in action. The full form of DLS in cricket is the Duckworth-Lewis-Stern method.
DLS is a mathematical formula that helps decide fair results when weather or other interruptions shorten a match. It sounds complicated; and it can be. But once you understand the basics, it all starts to make sense.
Knowing how DLS works gives you an edge in understanding online cricket odds and predicting outcomes. Especially in rain-prone tournaments like the IPL or World Cup, the DLS method in cricket can determine who wins or loses.
Knowing DLS in the context of understanding odds can swing dramatically when DLS is applied mid-match.
Cricket has long struggled with how to fairly decide rain-affected matches. Before the DLS method came into play, shortened games were settled using rudimentary and often unfair rules; these frequently left teams and fans frustrated.
The Duckworth-Lewis-Stern method was developed to bring logic and statistical fairness to limited-overs cricket. It accounts for both wickets in hand and overs remaining—two critical elements that determine how aggressively a team can score.
When matches are interrupted by rain or bad light, the DLS method is used to revise the target for the team batting second. It ensures that even when a game is shortened, the result reflects what might have happened in a full game under fair playing conditions. It’s now standard in international cricket and most domestic leagues, including the IPL.
For those interested in cricket betting or understanding score fluctuations during live matches, especially when weather intervenes, knowing how DLS works can be very helpful
The original method, then called the Duckworth-Lewis (DL) method, was introduced by the ICC in 1997 after gaining popularity due to its accuracy and fairness in domestic games. Its first major international use was during a 1998 ODI between Zimbabwe and England. Before that, methods like Average Run Rate and Most Productive Overs were used, both of which were deeply flawed.
The DL method was officially adopted by the ICC for use in ODIs and T20s, replacing the earlier Most Productive Overs method, which unfairly favoured the team batting second. Over the years, the system was updated to reflect the changing nature of limited-overs cricket; more aggressive batting, faster scoring, and dynamic match strategies.
With the rise of franchise cricket like the IPL, where every over can change the game, a more advanced and adaptable model was needed; hence the addition of Professor Stern.
The DLS method gets its name from its creators, Frank Duckworth and Tony Lewis, two British statisticians with a deep love for cricket. They developed the method in response to high-profile unfair results in the 1990s, most notably the rain-shortened 1992 World Cup semi-final between England and South Africa, which ended in farce.
In 2014, the model was updated by Professor Steven Stern, an Australian statistician who introduced refinements to better suit the modern game. His name was added to the title, resulting in the Duckworth-Lewis-Stern - and thus, the DLS method in cricket full form was born.
The trio’s work has helped to bring scientific credibility and competitive fairness to limited-overs cricket, and continues to evolve with the sport.
DLS (Duckworth-Lewis-Stern) Method: A mathematical formula used in limited-overs cricket to set revised targets for the team batting second in rain-affected or shortened matches. It considers both the number of overs and wickets remaining to ensure fairness. |
Limited-overs cricket comes with fixed resources: a set number of overs and wickets. When rain disrupts play, one team may not get equal resources to the other. The DLS method recalculates targets based on what resources are left, trying to keep things fair for both sides.
Before DLS, teams used methods like ARR or MPO (Most Productive Overs), which had serious flaws. These methods didn’t account for wickets lost or scoring trends, often giving one team a massive and unfair advantage.
The DLS method ensures both teams have a fair crack by balancing remaining overs and wickets. It’s not perfect, but it’s the most statistically sound system we have today.
More overs mean more scoring chances; more wickets in hand means more risk-taking. DLS uses these two elements as "resources" to calculate fair targets. A team with 10 wickets in hand and 20 overs to go has more scoring potential than one with 5 wickets in hand and 10 overs.
You don’t need to be a mathematician to get a grip on how DLS works. Think of it as a way to measure how much of a team’s resources have been used or remain. The final target is then adjusted based on these percentages.
At the heart of the DLS method are two things that represent the “resources” a batting team has to score runs:
Think of it this way; a team with 10 overs left and all 10 wickets in hand has a lot more scoring potential than a team with 10 overs but only 3 wickets left. The more overs and wickets a team has, the more aggressively they can bat.
DLS assigns each combination of overs and wickets a resource percentage based on historical data. This percentage is then used to compare how many resources both teams had available during their innings, especially when interruptions cause unequal playing conditions.
Overs Left | Wickets in Hand | Resource % |
50 | 10 | 100% |
25 | 5 | ~45% |
10 | 2 | ~18% |
These figures allow DLS to adjust targets fairly if one team didn’t get to use all their overs or lost wickets early.
The DLS model assigns a resource percentage to every combination of overs remaining and wickets lost. For example:
Here’s the simplified version of the DLS formula:
Team 2's Target = Team 1’s Score × (R2 ÷ R1)
Where:
If Team 1 used 100% of their resources (i.e. they played a full 50-over innings) and scored 300 runs, but Team 2 only has 80% of resources due to rain delays, their new target is:
300 × (80/100) = 240 runs
This ensures Team 2 isn’t chasing an unfair target when they’ve had less time and fewer chances to build an innings.
In the IPL or T20 matches, where the format is already short, DLS adjusts the target in even finer margins, and every ball counts.
A par score is the total Team 2 is expected to reach with its resources. If they equal it, the match is tied. Go above it, and they win; fall short, and they lose.
The par score is like the halfway mark; it shows where things are even. The target score includes the extra run needed to win. DLS calculates both depending on the game scenario.
" DLS is difficult to understand and will often earn the ire of cricket fans around the world. It continues to evolve as data from matches as added and continues to get better.
My view is that DLS is currently the best option for rain affected matches and while it is far from perfect (especially in T20 cricket), it avoids the shambolic situations that previous rain rules often resulted in. South African fans can rest easy that they will never see a 22 runs off one ball needed again!"
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Let’s look at some matches where the DLS method played a decisive role. These examples help explain how it works in high-stakes situations.
In a rain-hit match, Pakistan chased a revised target based on DLS calculations. With interruptions shortening the game, the new target reflected the reduced overs while accounting for their batting strength.
The IPL final was affected by rain, and DLS came into play. Chennai Super Kings were given a revised target which they chased successfully; the method ensured the match remained fair despite the delay.
One of the most famous DLS-related controversies; South Africa misread the par score and thought they were safe. The match ended in a tie, knocking them out of the tournament. A stark reminder of why understanding DLS is vital.
The DLS method might sound complicated at first, but it’s just a way to keep the game fair when nature gets in the way. With overs and wickets treated as resources, DLS balances things out so one team doesn’t get an unfair advantage. If you’re betting on cricket, knowing how DLS works could help you spot value or avoid traps.
For more on strategy, odds, and in-depth breakdowns, visit our expert Cricket Guides. And don’t forget to stay ahead with our Cricket Match Predictions.
The DLS method full form is Duckworth-Lewis-Stern; it’s a method used in cricket to calculate target scores when limited-overs matches are interrupted by rain or bad weather.
It was first developed in the 1990s and then refined in 2014.
When rain affects an IPL match, the DLS method adjusts the second team's target based on the number of overs left and wickets in hand. It ensures a fair and competitive end to the game.
Yes; the method is designed to be as fair as possible. It uses statistical models that factor in remaining overs and wickets to give each team an equal chance to win.
Yes, the DLS method is fully used in IPL matches whenever weather or interruptions affect the match length. It helps maintain fairness by calculating a revised target for the second team. Given the fast-paced nature of T20s, even a few overs lost can change strategies, and the DLS method adjusts for that using overs and wickets in hand.
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