Friday, September 15, 2006

Flaw in Duckworth-Lewis Method

Yesterday (Sept 14th, 2006) India lost against West Indies in the match conducted at Malaysia.

There is not allowance given in terms of field restrictions, where typically 20% of runs are made extra in the Power-plays. So in effect West Indies, had made only 113 (-20% on 141).

Of course there is an issue of team batting second, with a reduced score, where the pro-rata approximation can be used.

I would re-device the method like this.

Say if the team 1 batting first bats the full 50 overs, in the alloted time.

(1) If there is rain interruption after the team 2, bats for greater than 20 overs for a result. Take out 20% of runs, or the difference in run rate of the opposition.
India bats first and makes 309/5 and 133/2 in 20 overs, so the run rate difference is 6.65 - 6.18 = 0.47 or 4.7% less. Hence the actual run made by West Indies is 141/2 ( - 20% + 4.7% ) = 119. So in effect India won, by 14 runs.

(2) If there is rain interruption before the second session, and there is loss of say 30 overs, due to time. So the team batting second has to make 20% more than the average run-rate needed. For example, India bats first and makes 309/5 and 133/2 in 20 overs, the target has to be 6.2 + 20% = 7.64, which means West Indies should be given a target of 153. Even with this, WI made only 141, hence lost by 12 runs.

Note - the nearest whole number should be used.

தமிழ் தமிழ் எங்கும் தமிழ் - நல்ல முயற்சி. இதை வடிவமைத்தவர்கல்களுக்கு எனது வந்தனம்.
பாராத்துக்கள் தான் ப்ரோப்லேம்.
மேல் சொன்ன இனயா தளத்தில், நல்ல தய்பஅதிக்கலாம்

Wednesday, September 13, 2006

Prithiv's new Art!

Sept 10th and 13th, 2006

Surya-Jyothika wedding on Sept 11th, 2006

Congrats Surya (Saravanan) and Jyothika (Sona)! Good Luck! God Bless!