Table:
0
A
B
C
D
E
F
1
Year
Mens singles
Womens singles
Mens doubles
Womens doubles
Mixed doubles
2
1999
Marvin Steve
Maja Pohar
Dmitry Miznikov Valery Strelcov
Natalja Esipenko Natalia Golovkina
Valery Strelcov Natalia Golovkina
3
2000
Richard Vaughan
Anu Weckstrom
Michał Łogosz Robert Mateusiak
Felicity Gallup Joanne Muggeridge
Michael Beres Kara Solmudson
4
2001
Oliver Pongratz
Karina de Wit
Kristof Hopp Thomas Tesche
Erica van den Heuvel Nicole van Hooren
Peter Steffensen Lene Mork
5
2002
Przemysław Wacha
Petya Nedelcheva
Vincent Laigle Svetoslav Stoyanov
Tammy Jenkins Rhona Robertson
Russel Hogg Kirsteen McEwan
6
2003
Hendra Wijaya
Pi Hongyan
Vincent Laigle Svetoslav Stoyanov
Miyuki Tai Yoshiko Iwata
Carsten Mogensen Kamilla Rytter Juhl
7
2004
Hidetaka Yamada
Li Li
Daniel Glaser Dennis Von Dahn
Jiang Yanmei Li Li
Svetoslav Stoyanov Victoria Wright
8
2005
Holvy De Pauw
Miyo Akao
Simon Mollyhus Anders Kristiansen
Frances Liu Fan Shinta Mulia Sari
Hendra Wijaya Frances Liu Fan
9
2006
Andrew Smith
Petya Nedelcheva
Chris Tonks Chris Langridge
Liza Parker Jenny Day
Chris Langridge Jenny Day
10
2007
Carl Baxter
Guo Xin
Wouter Claes Frederic Mawet
Cai Jiani Guo Xin
Wouter Claes Nathalie Descamps
11
2008
Ville Lång
Kaori Imabeppu
Rupesh Kumar Sanave Thomas
Maria Thorberg Kati Tolmoff
Baptiste Careme Laura Choinet
12
2009
Peter Mikkelsen
Anita Raj Kaur
Mads Conrad-Petersen Mads Pieler Kolding
Ezgi Epice Claudia Vogelsang
Zvonimir Djurkinjak Stasa Poznanovic
13
2010
Ben Beckman
Nicole Grether
Joe Morgan James Phillips
Nicole Grether Charmaine Reid
Zvonimir Djurkinjak Stasa Poznanovic
14
2011
Dieter Domke
Minatsu Mitani
Kim Astrup Sorensen Rasmus Fladberg
Sandra-Maria Jensen Line Kjaersfeldt
Zvonimir Djurkinjak Stasa Poznanovic

Questions and formulas:
Question: How many years did Peter Mikkelsen win the Mens Singles?
Formula: ROWS(UNIQUE(FILTER(A1, B1="Peter Mikkelsen")))
Formula2: ROWS(UNIQUE(FILTER(A2:A14, B2:B14="Peter Mikkelsen")))
Level: medium
Question: Who won the Men's Doubles when Karina de Wit won the Women's Singles?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="Karina de Wit"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F14,C2:C14="Karina de Wit"),4))
Level: medium
Question: How many Mixed Doubles won when Oliver Pongratz won the Men's Singles?
Formula: ROWS(UNIQUE(FILTER(F1, B1="Oliver Pongratz")))
Formula2: ROWS(UNIQUE(FILTER(F2:F14, B2:B14="Oliver Pongratz")))
Level: medium
Question: Who won the Men's Doubles when Guo Xin won the Women's Singles?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="Guo Xin"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F14,C2:C14="Guo Xin"),4))
Level: medium