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DLS

The System

Duckworth Lewis Stern (DLS) is a system for generating revised targets in weather interrupted cricket games.

It provides two clear numbers:-

DLS Revised Target is a target for the team batting second where overs have been lost before and during the game

DLS Par provides a comparison figure at each over during the second innings to let players, umpires and spectators see the possibilities for a result. This figure only comes into play in determining a result where a game ends abruptly and no further play is possible.

 

Key Roles

Where weather affects the game and overs are lost, either

  • before the first innings,
  • during the first innings,
  • between innings,
  • during the second innings

Two things must happen

  1. The umpires calculate the time lost and are required to notify the scorers of the number of overs lost at every event.
  2. The scorers enter the overs lost on the cricHQ app at every event (at the time it happens) using the Action / Add Weather Delay / Enter Overs Lost keys.

The umpires must confirm with the scorers that they have entered the overs lost.

The game must not restart until this is done.

The Numbers
When those things are done the cricHQ app carries out the very complex calculations that are needed and determines the Revised Target 

  • at every resumption from the start of the second innings and
  • at any restart after any subsequent loss of overs.

The scorers will then restart the game on the app and notify the umpires of the Revised Target.

The umpires should then share this with the captains.

Those numbers are to be accepted by scorers, umpires and players because cricHQ uses the latest professional level DLS calculators and the system is used in all senior league and cup games in GMCL to determine the targets in weather affected games in 20, 40, 45 and 50 over competitions.

Other stand alone DL or DLS calculator apps that are available may generate different numbers but the cricHQ version is the standard and must be used in all GMCL games.