The origin of Twenty20 Cricket,
Dr George Christo
s 1997

media release, 5 Jan 2009

article in the West Australian Newspaper, 6 Jan. 2009
(above webpage taken down by WA News, here is a photo)
WA News article 2009
[Dr Christos was in constant contact with the ICC and the EWCB 
during the period 1996-2000 about the one-day cricket rain rule, 
so it is preposterous to suggest, as the ICC does in this article, 
that they receive lots of letters and do not remember 
the letter of 2 May 1997 from Dr Christos.]

The idea of 20/20 cricket was actually put forward to the ICC and the EWCB in a letter dated 2 May 1997 by Dr George Christos, a mathematician, at Curtin University, Perth, Western  Australia.  His letter, not only puts forward the idea of 20/20 cricket, but clearly outlines why it will be a huge success. Dr Christos, came up with this idea while working on a rain-rule for one-day 50-over cricket (called the ‘wicket-averaging method’), which was considered by the ICC, but who chose to stay with the Duckworth-Lewis method. Dr Christos was motivated to come up with a game (20/20 cricket) in which there would be no need to use the Duckworth-Lewis method.

original letter to the ICC (copy to EWCB) in May 1997

original letter Dr Christos to the ICC (copy to EWCB) May 1997

reply from ICC to this letter, May 1997
reply from ICC, May 1997

reply from the EWCB, June 1997

reply from EWCB

In a recent letter (3 pages) to the ICC, Dr George Christos writes to seek recognition of his intellectual property, Dec. 2008
letter dr christos to ICC 2008, page 1
letter Dr Christos to ICC, 2008, page 2 0f 3

letter Dr Christos to ICC, 2008, page 2 0f 3

link to article published in "The Cricketer", December 1998 regarding his 'wicket-averaging method' rain-rule proposed to the ICC, which is simpler to understand and play with, than the Duckworth-Lewis method, and is cost free, unlike the Duckworth-Lewis method, which requires software, updates to tables, and personnel.
 rain rain, so away, page 1

rain rain, go away

link to correspondence in "The Cricketer", January 1999, regarding the Duckworth-Lewis system.

correspondence in the cricketer re DL method. funny