Duckworth Lewis Calculator
The Duckworth Lewis system was invented by two statisticians, Frank Duckworth and Tony Lewis in an attempt to solve the perennial problem of creating a fair target for the side batting second in a limited-overs cricket match shortened by the weather. An online calculator is shown below.
This can be used for any form of limited overs cricket; from standard county cricket matches to Twenty20 matches (but not test matches).
How to use
The two bars represent two 50 over innings in a one day cricket match. The bars are made up of 300 lines, each line colour-coded to symbolise a ball in an innings. Clicking and dragging the left and right mouse buttons over the bars allow you to setup the innings as required.
This page explains the basic concepts of the Duckworth Lewis method with some examples. If you work through the examples you should get results like these worked examples. It does a reasonably good job though!
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Problems: If the java applet does not appear in your browser it will probably be because you don't have the latest java runtime plugin (J2SE 1.5.0 end user). If you run Firefox then a link will appear to automatically download the plugin, otherwise you can get it from here.
This is version 1.0. The GUI will be made to look a bit better in due course and the flicker issue resolved. Occasionally values are out by a few runs, especially at early points in an innings or when only one or two wickets are down. The error arises because the exact Duckworth Lewis resource values are not public knowledge and this calculator is only able to approximate those values.
Known issues
The applet takes a few seconds to load. If it takes longer, check that your computer is able to view java applets.
Example
28/04/07 Sri Lanka vs Australia in the World Cup final. This is what you should have for the Sri Lankan innings: (The actual target is 269 so a couple of runs out... but pretty close...)
