The equestrian events at the 1972 Summer Olympics in Munich included show jumping, dressage and eventing. All three disciplines had both individual and team competitions. The equestrian competitions were held at 3 sites: an existing equestrian facility at Riem for the individual show jumping and eventing competitions, the Olympic Stadium in Munich for the Nations Cup, and Nymphenburg, a Baroque palace garden, for the sold-out dressage. 179 entries, including 31 women, competed from 27 countries: Argentina, Australia, Austria, Belgium, Bolivia, Bulgaria, Brazil, Canada, Chile, Denmark, German Democratic Republic (GDR), France, Federal Republic of Germany (FRG), Great Britain, Hungary, Ireland, Italy, Japan, Mexico, the Netherlands, Poland, Portugal, Soviet Union, Spain, Sweden, Switzerland, and the USA. The youngest participant was Kurt Maeder from Switzerland at 19 years old, while the oldest rider was Lorna Johnstone from Great Britain at 70 years old. An outbreak of Venezuelan equine encephalitis broke out in Mexico before the Games, so the Mexican horses were not permitted into the host country. The IOC and FEI agreed to allow the Mexicans to lease horses in Germany for the show jumping and eventing competitions so that they may still compete. While this allowed the riders to attend the Olympics, the Mexicans had dismal results, including all four of the eventers being eliminated on cross-country. The disciplines Show jumping 74 riders from a total of 21 countries contested Hans-Heinrish Brinckmann's Olympic courses. The individual competition was held over two rounds. The course of the first round consisted of 14 obstacles and 17 jumping efforts over a 760-meter track, with several difficult individual fences. This included a 5-meter water, which produced 33 faults in the first round, and several massive oxers (four at 2 meters wide and a fifth at 2.10 meters) which all combined produced another 20 faults. Only 3 riders were able to produce a clear round, and 8 finished with only a knockdown. The second round was a 660-meter track with 10 obstacles and 13 jumping efforts. One rider who went clear in the first round was not in contention after the second. The two other clear rounds from the first course—Graziano Mancinelli and Ann Moore—had 2 rails apiece in the second for 8 faults. Neal Shapiro, one of the eight 4-faulters in round 1, finished the second round with only one rail so also finished both rounds with 8 faults. Therefore, a jump-off between the 3 riders