Firstly, I'm not defending D/L method for T20 games.
I just spotted a flaw in Srinivas Bhogle's argument about the curves being inseparable for 5,6 or 7 overs. In the case of a Twenty20 game, shouldn't the horizontal axis of the plot contain markers: 20-16-12-8-4-0 instead of 50-40-30-20-10-0. Therefore, 5, 6 or 7 overs in a T20 game will correspond to 12.5, 15.0 or 17.5 overs in this plot of a 50-over game. At these overs, the curves still look quite spaced out for different wickets in hand.
I like the D/L method of obtaining par score by looking at available resources for a team at any stage in a rain affected game. It's just that D/L needs to update their curves or come up with new curves for T20 games solely based on T20 games data. They could probably get more data to revise their curves from IPL and other county games. Though it is unlikely that they will find many rain affected T20 games to compile new curves!!!
In my opinion, updated curves will look more flat at the beginning and quite steep when approaching 0 overs.
Re: Flaw in this argument
by Srinivas Bhogle on May 05, 2010 10:53 PM
When D/L is used in T20, we pretend that the first 30 overs are lost. So the operative part of the curves are only what you see to the right of 20 'overs remaining'.
Re: Re: Flaw in this argument
by J N on May 05, 2010 11:02 PM
That's interesting to know. In that case, will the first team (actually both teams) have only 58-59% resources at the start of the game? Or do they normalize the vertical axis to 100% at 20 overs?
Re: Re: Re: Flaw in this argument
by Srinivas Bhogle on May 06, 2010 07:20 AM
All targets are determined by the ratio of resource percentages ... so there's no need to scale up to 100%
In your article you write that using MPO with the proviso that first 5 overs are to be blowed by diffent bolwers. What I failed to understand is how does one decide to use 5 different bolwers for first 5 overs, when you don't know when it will actaully start raining. As they have for a 50 over game... the side chasing shoudl get atleast 15 (or is it 25?) overs to bat to call it a match... similarly for a T20, the chasing side should get atleast 10 overs to call it a game.
Re: Jaydevan's formula
by vinay on May 06, 2010 12:38 AM
agreed with rp. a t20 match over in just 5 overs, is ridiculous. atleast make it a minimum of 10 overs.
Re: Jaydevan's formula
by Srinivas Bhogle on May 05, 2010 10:57 PM
Only five overs are enough to make it a game in T20. That's essentially the problem! If the min. is raised to 10 overs, D/L will give good results. In ODI the min is now 20
Re: Re: Jaydevan's formula
by Ravichandran on May 06, 2010 08:14 AM
If 20 overs are minimum which is 40% then in T20 it should be 8 overs. Hope I am correct
Any match is supposed to be PLAYED to a result. No jiggery pokery should be allowed like duckworth lewis or Duckbilled Platypus or Duckfilled Fattypuss. These are all meant to encourage sattebaazi in cricket. A true result can and should only be arrived at by PLAYING to the end. Schedules should be flexible enough to cater to a few days of disruption due to rains etc. Hockey has extra time followed by penalty kicks, tennis has extended games to reach fair results, why cricket should have some stupid formulae which nobody understands and are a means of manipulation.
Re: Rained out ! !
by vinay on May 06, 2010 12:37 AM
u r right. but those extra times r required when the game can b continued. when there is rain or bad light, no regular play is possible not to think of extra time. so the need for formula based solutions.
this duckworth lewis system and the other dude's system both are duds the match should be cancelled if the team doesnt get full 20 overs or 50 overs if the case be and shift it towards the end of the schedule. the tournament should keep some gap between the last league matche and the first quarter finals so these teams can be accomodated. as no matter how many runs one needs to get its going to be unfair to the other team
Re: they should call off the match if it rains and shift to the e
by tim jim on May 05, 2010 09:38 PM
if it still rains even on those days and if both teams doesnt get to play the full 20overs or 50 overs then the teams get a point each
