Note that during the history of the Olympiad the number, naming, and format of the exam rounds
has changed considerably. The listing below uses the modern-day naming convention.
A comprehensive history of the competition format can be found here.
| Year |
Round |
# Prob. |
# Part. |
Winner(s) |
English |
German |
French |
Italian |
| 2026 |
Second Round |
6 |
182 |
Jovian Soejono,
Jason Su,
Andrej Ševera,
Hongjia Meng
|
pdf |
pdf |
pdf |
pdf |
| 2025 |
Selection |
12 |
16 |
Andrej Ševera
|
pdf |
pdf |
pdf |
|
|
Final Round |
8 |
26 |
Hongjia Meng
|
pdf |
pdf |
pdf |
|
|
Second Round |
6 |
178 |
Evelyn Ebneter
|
pdf |
pdf |
pdf |
pdf |
| 2024 |
Selection |
12 |
18 |
Felix Xu
|
pdf |
pdf |
pdf |
pdf |
|
Final Round |
8 |
27 |
Felix Xu,
Andrej Ševera
|
pdf |
pdf |
pdf |
pdf |
|
Second Round |
6 |
176 |
Jerry Schupp
|
pdf |
pdf |
pdf |
pdf |
| 2023 |
Selection |
12 |
18 |
Bora Olmez
|
pdf |
pdf |
pdf |
|
|
Final Round |
8 |
27 |
Mathys Douma,
Bora Olmez
|
pdf |
pdf |
pdf |
|
|
Second Round |
6 |
160 |
Anna Kokorich,
Bora Olmez,
Mathys Douma
|
pdf |
pdf |
pdf |
pdf |
| 2022 |
Selection |
12 |
14 |
Mathys Douma
|
pdf |
pdf |
pdf |
pdf |
|
Final Round |
8 |
27 |
Mathys Douma
|
pdf |
pdf |
pdf |
|
|
Second Round |
6 |
149 |
Mathys Douma,
Tejas Krishnan,
Bora Olmez,
Louis Renner
|
pdf |
pdf |
pdf |
pdf |
| 2021 |
Selection |
12 |
17 |
Mathys Douma
|
pdf |
pdf |
pdf |
|
|
Final Round |
8 |
28 |
Philipp Junghans
|
pdf |
pdf |
pdf |
|
|
Second Round |
6 |
119 |
Joël Huber,
Mathys Douma,
Johann Williams,
Yanta Wang
|
pdf |
pdf |
pdf |
pdf |
| 2020 |
Selection |
12 |
14 |
Raphael Angst
|
pdf |
pdf |
pdf |
|
|
Final Round |
8 |
25 |
Raphael Angst
|
pdf |
pdf |
pdf |
|
|
Second Round |
6 |
133 |
Joël Huber,
Mathys Douma
|
pdf |
pdf |
pdf |
pdf |
| 2019 |
Selection |
12 |
14 |
Tanish Patil
|
pdf |
pdf |
pdf |
|
|
Final Round |
8 |
24 |
Raphael Angst
|
pdf |
pdf |
pdf |
|
|
Second Round |
6 |
140 |
Tanish Patil,
Tim Frey,
Valentin Imbach
|
pdf |
pdf |
pdf |
pdf |
| 2018 |
Selection |
12 |
16 |
Valentin Imbach
|
pdf |
pdf |
pdf |
|
|
Final Round |
10 |
25 |
Valentin Imbach
|
pdf |
pdf |
pdf |
|
|
Second Round |
6 |
109 |
Tanish Patil
|
pdf |
pdf |
pdf |
|
| 2017 |
Selection |
12 |
17 |
Jischai Wyler
|
|
pdf |
pdf |
|
|
Final Round |
10 |
29 |
Henning Zhang
|
|
pdf |
pdf |
|
|
Second Round |
6 |
105 |
Henning Zhang
|
pdf |
pdf |
pdf |
pdf |
| 2016 |
Selection |
12 |
14 |
Daniel Rutschmann
|
|
pdf |
pdf |
|
|
Final Round |
10 |
26 |
Henning Zhang
|
|
pdf |
pdf |
|
|
Second Round |
5 |
121 |
David Rusch,
Stefanie Zbinden
|
pdf |
pdf |
pdf |
|
| 2015 |
Selection |
12 |
15 |
Stefanie Zbinden
|
|
pdf |
pdf |
|
|
Final Round |
10 |
26 |
Robert Meier
|
|
pdf |
pdf |
|
|
Second Round |
5 |
101 |
Stefanie Zbinden,
Robert Meier
|
|
pdf |
pdf |
|
| 2014 |
Selection |
12 |
15 |
Louis Hainaut
|
|
pdf |
pdf |
|
|
Final Round |
10 |
28 |
Louis Hainaut
|
|
pdf |
pdf |
|
|
Second Round |
5 |
103 |
Beat Jäckle
|
|
pdf |
pdf |
|
| 2013 |
Selection |
12 |
15 |
Kevin Burri,
Louis Hainaut
|
|
pdf |
pdf |
|
|
Final Round |
10 |
27 |
Alain Rossier
|
|
pdf |
pdf |
|
|
Second Round |
5 |
93 |
Alain Rossier
|
|
pdf |
pdf |
pdf |
| 2012 |
Selection |
12 |
16 |
Alain Rossier
|
|
pdf |
pdf |
|
|
Final Round |
10 |
27 |
Alain Rossier
|
|
pdf |
pdf |
pdf |
|
Second Round |
5 |
66 |
Laura Gremion
|
|
pdf |
pdf |
pdf |
| 2011 |
Selection |
12 |
15 |
Nikola Djokic
|
|
pdf |
pdf |
|
|
Final Round |
10 |
25 |
Laura Gremion
|
|
pdf |
pdf |
|
|
Second Round |
5 |
66 |
Nikola Djokic
|
|
pdf |
pdf |
pdf |
| 2010 |
Selection |
12 |
11 |
Clemens Pohle
|
|
pdf |
pdf |
|
|
Final Round |
10 |
11 |
Clemens Pohle
|
|
pdf |
pdf |
pdf |
|
Second Round |
5 |
67 |
Clemens Pohle
|
|
pdf |
pdf |
|
| 2009 |
Selection |
12 |
13 |
|
|
pdf |
pdf |
|
|
Final Round |
10 |
27 |
Florian Meier
|
|
pdf |
pdf |
|
|
Second Round |
5 |
62 |
Eben Freeman,
Florian Meier
|
|
pdf |
pdf |
pdf |
| 2008 |
Selection |
12 |
17 |
Dimitri Wyss
|
|
pdf |
pdf |
|
|
Final Round |
10 |
27 |
Dimitri Wyss
|
|
pdf |
pdf |
|
|
Second Round |
5 |
73 |
Eben Freeman
|
|
pdf |
pdf |
pdf |
| 2007 |
Selection |
12 |
17 |
Vladimir Serbinenko
|
|
pdf |
pdf |
|
|
Final Round |
10 |
29 |
Vladimir Serbinenko
|
|
pdf |
pdf |
pdf |
|
Second Round |
5 |
101 |
Dimitri Wyss
|
|
pdf |
pdf |
pdf |
| 2006 |
Selection |
12 |
15 |
Markus Sprecher
|
|
pdf |
pdf |
|
|
Final Round |
10 |
25 |
Markus Sprecher
|
pdf |
pdf |
|
|
|
Second Round |
5 |
56 |
Andreas Bärtschi,
Le Thanh Tu Nguyen
|
pdf |
pdf |
pdf |
pdf |
| 2005 |
Selection |
12 |
12 |
Markus Sprecher
|
|
pdf |
pdf |
|
|
Final Round |
10 |
25 |
Markus Sprecher
|
|
pdf |
pdf |
|
|
Second Round |
5 |
56 |
Vladimir Serbinenko
|
|
pdf |
pdf |
|
| 2004 |
Selection |
12 |
12 |
Markus Sprecher
|
|
pdf |
pdf |
|
|
Final Round |
10 |
24 |
Markus Sprecher
|
|
pdf |
pdf |
|
|
Second Round |
5 |
57 |
Markus Sprecher
|
|
pdf |
pdf |
|