1968–2026

International Chemistry Olympiad (IChO)

The theory problems of the International Chemistry Olympiads from 1968 to 2026 with complete solutions, in seven languages. Each solution was checked against the official solution wherever the organisers published one.

  • 58 olympiads
  • 458 theory problems
  • 7 languages

All years

2020–2026

2010–2019

2000–2009

1990–1999

1980–1989

1970–1979

1968–1969

No IChO was held in 1971.