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New for 2020, Duckworth Lewis makes a first appearance in the Drakes Huddersfield League.

Here's a useful guide to how it will be be implemented on a match day by umpires and DLMM's (Duckworth-Lewis Match Managers) and examples of the effect it may have on matches.

 

Note: If not using electronic ball-by-ball scoring the DLMM must use the standalone DL calculator which is within PCS on iPhone and Android phones.

Further Guidance

UMPIRES
click here

DLMM
click here

Watch how the Duckworth-Lewis calculator works in the ECB play-cricket Scorer app. This demo video is best viewed in full screen.

Viewing on a mobile device? The video is best viewed maximised in landscape view.

How DL Will Be Executed

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1

Before The Match

Every club must have sufficient members capable of acting as Duckworth Lewis Match Manager (DLMM) such that one is present at every game. In practice this will usually be the home team scorer (or Primary scorer where electronic scoring is being used) or home team captain but by arrangement could be an umpire or another official from either team.

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2

Before The Toss

The umpires must confirm who will be the Duckworth Lewis Match Manager (DLMM) and availability of the Play-Cricket Scoring app (PCS).

If not using electronic ball-by-ball scoring the DLMM must use the standalone DL calculator which is within PCS on iPhone and Android phones.

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3

Umpire Responsibility

Umpires must note the time (plus overs completed, score, wkts and batsman on striker) at every suspension of play and then once they have decided that play will commence at a certain time, they must calculate the length of playing time that has been lost during that suspension break and whether or not any further overs have been lost from the game.

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4

DLMM Responsibility

The umpires shall inform the DLMM of the number of overs lost in that suspension period before any recommencement of play giving DLMM time to record a new Suspension Break in PCS app.

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5

Calculating The Revised Total

On the expected resumption of play, The DLMM will be informed of the amount of overs lost during the Suspension Break by the umpire. The DLMM will then input this figure into the D-L calculator on the play-cricket scorer app shortly before play recommences.

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6

End of Innings

If the 1st innings is complete, the Revised First Innings Total (RFIT) is calculated and displayed on the scoreboard where the normal First Innings Total is located, which should be checked by the umpires by the time play commences.

Important: The app reveals a target to be reached. Always display the revised first innings score as you would in a normal, uninterrupted match!

  Umpires Guidance

  DLMM Guidance

First Innings
 
Calculating Overs Lost

On the initial rain interruption, first we must make a calculation of overs lost to work out our overs remaining figure...

Note: If overs remaining in either innings is less than 20, the match is abandoned.

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Calculating Overs Remaining

We then make a second calculation and communicate the result to the DLMM and the scorer the overs remaining to display on the scoreboard.
 

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Duckworth Lewis Examples

First Innings

A 50 over League game which started on time at 1pm.

Rain stops play at 2pm with score 40/1 off 16 overs.

Play re-starts at 3:15pm then time lost is 75 mins. The first 30mins lost within a game is ignored so 75-30=45mins lost At 1 over per side for every full 6mins lost we remove 45/6 = 7overs per side.

Umpire must note the overs remaining in the innings as 27. 50-16-7=27. Umpire should check that scoreboard is showing 27 overs upon resumption of play.

Umpire will inform the DLMM that 27 overs are remaining in 1st innings. The DLMM will set the switch to state that DL is now in operation and will record Suspension Break 1 as:

* overs gone= 16 runs= 40 wkts= 1 overs remaining= 27

This will NOT give a revised 1st innings total until the 1st innings is complete.

First innings concludes at 200/5 off the new limit of 43 overs. As part of ball-by-ball scoring closing the 1st innings will reveal a Target (score to win) of 207 which is one more than the Revised First Innings Score of 206 which must be shown on the scoreboard. NOTE: DO NOT DISPLAY TARGET ON THE SCOREBOARD

If using the DL standalone calculator the 1st innings total must be entered to reveal the Target from which the RFIT is derived.

Second Innings

During second innings Rain Stops Play with score at 120/9 off 20overs With 23 overs to go and 2 overs to lose for every full 6mins then once 72mins have been lost the game is concluded and Umpires will inform the DLMM to enter a new Suspension Break:

* overs gone= 20 runs= 120 wkts= 9 overs remaining= 0

This will reveal a Target of 196 or RFIT of 195 and so, as 20 overs have been completed the team batting first have won by 75 runs under DL.

You are recommended to download the PCS app onto a Smartphone and follow Tutorial 5 – Duckworth Lewis. Note that once you have opened the PCS app you do NOT need to login to use either the Tutorials or the Standalone DL calculator. Once you have followed the tutorial you should click on Tools from the home page and that will allow you to select the Standalone DL calculator. You could run the following example on the Standalone DL calculator.

First Innings

First innings was completed at 6:15 with score on 150/5 (wkts lost is actually irrelevant when there has been no loss of overs immediately prior to end of innings).

Second Innings

Second innings commences at 6:25 on basis of 166 to win off 25 overs as calculated in first part of example.

After completion of first over at 6:30 with score on 7 for 0 play is suspended

Play re-commences at 6:47 – this is actually the latest time play could re-commence otherwise 20 overs would not be possible and game would be abandoned.

17mins playing time has been lost – on basis of 2 over lost for every complete 6mins. Note rate is same as first innings with same minimum of a full 6mins but as you are no longer losing an over from each innings the overs lost in 2nd innings will be in pairs of overs. So 17/3 = 5overs lost i.e 19overs remaining

A new Suspension Break must be entered - DO NOT EDIT THE PREVIOUS SUSPENSION BREAK - but note that the breaks are numbered from 1 in each innings) as follows:

* overs gone= 1 runs= 7 wkts= 0 overs remaining= 19

Target re-calculates at 141 from, in total, 20 overs. This, as explained above, will be independent of overs lost if there is no further stoppage. There is no fixed time for conclusion of play but in worst case this example should conclude approx 8:15 but if there is another delay the game will be abandoned because otherwise there would not be 20 overs available even if very few runs or wickets were required at the time of the delay.

First Innings

A 50 over League game scheduled to start at 1pm.

Start delayed until 1:17pm, 17mins late. Therefore 17/6 = 2 overs deducted from each side i.e. 48overs per side

Play suspended at 1:40pm score is 21/1 off 7overs

Play re-starts at 2:00pm. 20mins interruption is less than 30mins waiver time (before DL is implemented) therefore no loss of overs.

Play suspended at 2:30pm score is 50/2 off 15overs

Play re-starts at 2:45pm 15mins interruption + 20mins total to date = 35mins which is 5 mins in excess of waiver time. 5mins is less than the 6mins minimum so 0 overs lost but DL is now in operation if any more overs are lost.

Play suspended at 3:30pm score is 100/2 off 25.2overs *Play re-starts at 4:45pm with continuation of the 26th over. 75mins interruption. DL is now in operation so each interruption is taken in isolation. This will require the recording of a new Suspension Break (SB1) as 75/6 = 12 overs to be reduced from each team making it a 36 overs per team game.

Suspension Break 1 overs gone= 25.2 runs= 100 wkts= 2 overs remaining= 10.4

Play suspended at 5:25pm score is 170/4 off 34.5 overs due to rain when 4th wkt fell Once off the field for 6mins the 1st innings is closed because you cannot return for less than a full over so Tea will be taken and play will be scheduled to re-start at 6:01pm but nominally 6:00pm.

Second Innings

A new Suspension Break (SB2) will be recorded as:

Suspension Break 2 overs gone= 34.5 runs= 170 wkts= 4 overs remaining= 0 This will give a Target of 202 off 34.5 overs but as an innings can only be scheduled for a full number of overs, once the 1st innings has been closed, a new Suspension Break must be recorded as:

Suspension Break 1 overs gone= 0 runs= 0 wkts= 0 overs remaining= 34 This will give a Target of 199 off 34 overs but RFIT of 198 is to be shown off 34 overs on scoreboard.

Play re-starts at 6:00pm with commencement of a 34 over 2nd innings

Play suspended at 7:30pm score is 101/2 off 25.2overs

No further play is possible during the next 30mins so game is concluded with the entry of another Suspension Break.

Suspension Break 2. Overs gone= 25.2 runs= 101 wkts= 2 overs remaining= 0.

DL will return a Target (to win) of 133, therefore 2nd team to bat have won by 8wkts under DL
Note – prior to entering Suspension Break 2 the DL calculator will be showing Target 199 off 34 overs and you will be able to see the Par Score (score to tie same as RFIT) for any combination of overs and wkts you care to enter. E.g. 25.2overs gives a Par score of 130/1, 132/2 and 134/3 while 26 overs gives a Par of 136/2