The month, city and number of players has changed since the first edition in 1972.
The name of the event has been changed a few times since the first edition in 1990.
It is no longer included in the book since the second edition.
It has been available in electronic form since the 1993 edition.
It has been removed from the book since its second edition.
The new one is the most significant revision since the 12th edition in 1969.
It was held from 9 to 31 May 2009, and marked the 100th year since the first edition of the race.
Since the 2007 edition, there was no official third place match.
Care has been taken to incorporate political changes since the previous edition, in 1992.
Over four million copies of the book have been sold since the first edition.
