The International Chemistry Olympiad (IChO) is a worldwide competition for talented high-school students where they test their chemistry knowledge and skills by solving difficult problems, both practical and theoretical.   The first International Chemical Olympiad was held in Prague on June 18 – 21, 1968, with only three countries - Czechoslovakia, Hungary and Poland competing. The first Olympiad in a non-Socialist country took place in 1980 in Linz, Austria. The number of participating countries keeps growing and last year the IChO was attended by 296 competitors from 76 countries and all 5 continents. They were accompanied by an additional 233 people...