History of the Competition Format
- 1997: IMO selection exam 1?x4 problems
- 1998: IMO selection exams 2x5 problems
- 2001: First English translation
- 2002: First French translation
- 2003: “Pre-Selection” round before IMO selection with 1x5 problems
- 2004: imosuisse gets founded?
- 2004: Pre-Selection round renamed “Final Round” with 2x5 problems
- 2004: “Preliminary Round” added before Final Round with 1x5 problems
- 2004: Selection 4x3 problems
- 2005: Separate selection exam for LIE, 1x5 problems
- 2006: First Italian translation
- 2006: Second Round is first exam in all 4 languages FR, EN, DE, IT
- 2006: Final Round is last exam not translated to French
- 2007: First Year with > 100 participants
- 2009: First exam of Final Round translated to Spanish??
- 2017: Preliminary Round 1x6 problems, 2 per topic GCN
- 2017: Selection is last exam not translated to English
- 2019: Final Round 2x4 problem, ACGN per day
- 2021: Preliminary Round renamed “Second Round”
- 2021: “First Round” added before Second Round with 35 problems
- 2022: First Round split into Junior and Senior, 30 problems each
- 2027: Second Round split into Junior and Senior, 6 problems each, 2 per GCN