Table:
0
A
B
C
D
E
F
1
Year
Mens singles
Womens singles
Mens doubles
Womens doubles
Mixed doubles
2
1988
Kim Brodersen
Katrin Schmidt
Markus Keck Robert Neumann
Katrin Schmidt Nicole Baldewein
Markus Keck Katrin Schmidt
3
1989
Sörgard
Katrin Schmidt
Stefan Frey Robert Neumann
Birgitta Lehnert Monica Halim
Chen Jin Katrin Schmidt
4
1998
Yong Yudianto
Karolina Ericsson
Michael Keck Christian Mohr
Erica van den Heuvel Judith Meulendijks
Michael Keck Nicol Pitro
5
1999
Oliver Pongratz
Zheng Yaqiong
Quinten van Dalm Dennis Lens
Britta Andersen Lene Mork
Chris Bruil Erica van den Heuvel
6
2000
Xie Yangchun
Xu Huaiwen
Michael Søgaard Joachim Fischer Nielsen
Claudia Vogelgsang Xu Huaiwen
Michael Keck Erica van den Heuvel
7
2001
Niels Christian Kaldau
Pi Hongyan
Michael Søgaard Michael Lamp
Neli Boteva Elena Nozdran
Chris Bruil Lotte Bruil-Jonathans
8
2002
Chen Gang
Pi Hongyan
Simon Archer Flandy Limpele
Mia Audina Lotte Bruil-Jonathans
Nathan Robertson Gail Emms
9
2003
Dicky Palyama
Xu Huaiwen
Michał Łogosz Robert Mateusiak
Nicole Grether Juliane Schenk
Frederik Bergström Johanna Persson
10
2004
Niels Christian Kaldau
Xu Huaiwen
Simon Archer Anthony Clark
Kamila Augustyn Nadieżda Kostiuczyk
Rasmus Mangor Andersen Britta Andersen
11
2005
Kasper Ødum
Xu Huaiwen
Tony Gunawan Halim Haryanto
Nicole Grether Juliane Schenk
Vladislav Druzhchenko Johanna Persson
12
2006
Ronald Susilo
Xu Huaiwen
Michał Łogosz Robert Mateusiak
Jiang Yanmei Li Yujia
Robert Mateusiak Nadieżda Kostiuczyk
13
2007
Lu Yi
Wang Yihan
Mathias Boe Carsten Mogensen
Yang Wei Zhang Jiewen
Kristof Hopp Birgit Overzier
14
2008
Chetan Anand
Maria Febe Kusumastuti
Mathias Boe Carsten Mogensen
Helle Nielsen Marie Roepke
Diju Valiyaveetil Jwala Gutta
15
2009
Jan Ø. Jørgensen
Juliane Schenk
Rupesh Kumar Sanave Thomas
Helle Nielsen Marie Roepke
Mikkel Delbo Larsen Mie Schjoett-Kristensen
16
2010
Chen Long
Liu Xin
Mathias Boe Carsten Mogensen
Pan Pan Tian Qing
Zhang Nan Zhao Yunlei
17
2011
Hans-Kristian Vittinghus
Li Xuerui
Bodin Isara Maneepong Jongjit
Mizuki Fujii Reika Kakiiwa
Chan Peng Soon Goh Liu Ying
18
2012
Chou Tien-chen
Juliane Schenk
Ingo Kindervater Johannes Schoettler
Wang Rong Zhang Zhibo
Anders Kristiansen Julie Houmann

Questions and formulas:
Question: When did Chetan Anand win his first men's single?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Chetan Anand"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F18,B2:B18="Chetan Anand"),1))
Level: medium
Question: How many times did Niels Christian Kaldau win the men's single and Pi Hongyan win the women's single in the same year?
Formula: ROWS(UNIQUE(FILTER(A1, (B1="Niels Christian Kaldau")*(C1="Pi Hongyan"))))
Formula2: ROWS(UNIQUE(FILTER(A2:A18, (B2:B18="Niels Christian Kaldau")*(C2:C18="Pi Hongyan"))))
Level: medium
Question: Who won the men's double when Chou Tien-Chen won the men's single?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Chou Tien-chen"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F18,B2:B18="Chou Tien-chen"),4))
Level: medium