Tony Lewis,Inventors of Duckworth-Lewis-Stern Method,Dies Aged 78

Tony Lewis and fellow mathematician Franck Duckworth,created the formula which helped in calculating run-chases in weather-affected limited-overs matches.

Tony Lewis,the man renowned for devising cricket’s Duckworth-Lewis rain rules formula,has died at the age of 78.

Lewis in conjunction with his fellow mathematician Frank Duckworth,devised the rule which was officially adopted by the ICC in 1999 to help calculate fair run-chases in the event of overs being lost to rain during that summer’s World Cup.


The name of Steven Stern,an Australian professor from Queensland,in 2014,added to what is now known as the “DLS” method or the Duckworth-Lewis-Stern method.

After Steven Stern took over and made adjustments to the rule by taking into consideration modern day scoring rates.The DLS method was first employed in 2015 World Cup played in Australia and New Zealand.

This rule,has been criticized by many,especially with the advent of T20 cricket when wickets in hand a less critical factor in the shorter format were deemed to have been given too much weight for sides batting second.

“It is with much sadness that the ECB has learned of the passing of Tony Lewis,aged 78,” read a statement from England and Wales Cricket Board. “Cricket is deeply indebted to both Tony and Frank’s contributions to the sport.We send our sincere condolences to Tony’s family,” it added.

Born in Bolton,Lancashire,Lewis had graduated from Sheffield University with a degree in Mathematics and Statistics.He,alongside Duckworth,were awarded MBEs in 2010 for their services to cricket and mathematics.

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