http://www.equestrianandhorse.com/shows/olympics.html
Olympic Show Jumping History
• Show Jumping was included in the 1900 Olympic games in Paris, France with the courses smaller and as technical as they are today.
• Horses were required to carry a weight of 165 pounds.
• Only male cavalry officers were allowed to compete.
• In the 1912 Olympics in Stockholm the course included approximate 15 jumps some of which were jumped more than once.
o The height of the jumps was around 1.4 meters
o The width of the water jump was around 4 meters.
• At the 1924 Games in Antwerp there were 14 obstacles
o The height of the fences was 1.3 to 1.4 meters high.
o The water jump was 4 meters wide.
• The 1932 Olympics consisted of 20 jumping efforts with the height of the course increasing to between 1.4 and 1.6 meters high with the width of the water jump increasing to 5 meters wide.
• By the1952 Helsinki Games men and women civilians were allowed to compete.
• The show jumping height is now 1.6 meters with the width of the fences being a maximum of 2 meters or 2.2 meters for a triple bar. The water jump distance is now a maximum of 4.5 meters.
• The current Olympic format is held over 5 rounds to determine the team and individual medals. There are four riders in each team with the top three scores counting towards the total for each nation. Each riders score is taken and added to their individual score with only the top fifty individuals going forward to Round Three, which is where the team medals are decided. The individual medals are decided in the fifth and final round.
http://en.wikipedia.org/wiki/Equestrian_at_the_Summer_Olympics
http://www.theglobeandmail.com/sports/olympics/bob-the-builder-embraces-olympic-show-jumping-challenge/article4459286
Above all, Ellis will avoid the type of obstacles used at the 1968 Mexico Olympics, with a round that featured six of the biggest jumps ever built for an Olympic competition. Some riders called it “terrifying.”
Only two horses negotiated that round cleanly. A Canadian team that included Jim Elder, Jim Day and Tom Gayford won the gold medal with 102.75 faults, while it’s much more common for the winning team to have about 20 faults. (Every time a horse lowers the height of a fence, they incur four faults. The fewer faults, the better.)
“I never saw fences that big,” said Palacios, speaking of Mexico. “And I never built fences that big.”
One of them required the horses to clear a huge oxer (a jump with two standards, requiring the horses to jump width as well as height) with a front rail that stood five feet, nine inches high and a back rail that was six feet high at the back – with a spread of seven feet, three inches.
Horses also had to clear a giant wall that was five feet, nine inches high – after coming off a turn.
http://www.horse-canada.com/horses-and-history/meet-stroller-four-legs-and-a-pair-of-wings/
http://en.wikipedia.org/wiki/Equestrian_at_the_1968_Summer_Olympics
http://www.horsemagazine.com/thm/2010/07/four-showjumping-masters-–-part-2-william-steinkraus/
http://broganrogantrevinoandhogan.wordpress.com/2013/07/06/the-tale-of-the-little-giant/
http://www.solarnavigator.net/sport/equestrian_show_jumping.htm
http://network4events.com/fileadmin/user_upload/870601_OlympicEncyclopedia_224_Equestrian.pdf
http://www.horse-canada.com/horses-and-history/mexico-olympics-1968-the-canadian-gold-standard/