Table:
0
A
B
C
D
E
F
1
Year
Men's singles
Women's singles
Men's doubles
Women's doubles
Mixed doubles
2
2004
Yuichi Ikeda
Kati Tolmoff
Theodoros Vekos George Patis
Kati Tolmoff Solenn Pasturel
Ilkka Nyqvist Leena Löytömäki
3
2005
Jean-Michel Lefort
Kati Tolmoff
Benoit Azzopard Baptiste Careme
Piret Hamer Helen Reino
Jean-Michel Lefort Akvile Stapusaityte
4
2006
Kęstutis Navickas
Kati Tolmoff
Andrej Ashmarin Anton Nazarenko
Claudia Vogelgsang Caren Hückstädt
Adam Cwalina Malgorzata Kurdelska
5
2007
Kristian Nielsen
Kati Tolmoff
Tuomas Nuorteva Mikko Vikman
Lucia Tavera Sandra Chirlaque
Anton Nazarenko Evgenia Antipova
6
2008
No competition
No competition
No competition
No competition
No competition
7
2009
Ville Lång
Tatjana Bibik
Naoki Kawamae Shoji Sato
Cai Jiani Rong Bo
Zhang Yi Cai Jiani
8
2010
Cancelled
Cancelled
Cancelled
Cancelled
Cancelled
9
2011
Ville Lång
Michelle Kit Ying Chan
Peter Käsbauer Josh Zurwonne
Selena Piek Iris Tabeling
Jacco Arends Selena Piek
10
2012
Ville Lång
Judith Meulendijks
Laurent Constantin Sebastien Vincent
Selena Piek Iris Tabeling
Dave Khodabux Selena Piek

Questions and formulas:
Question: Who all played mixed doubles in 2010?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1=2010),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F10,A2:A10=2010),6))
Level: medium
Question: Who played women's singles in the year after 2006 when men's singles was cancelled?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(A1>2006)*(B1="cancelled")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F10,(A2:A10>2006)*(B2:B10="cancelled")),3))
Level: medium
Question: Who played Men's singles in 2007?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1=2007),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F10,A2:A10=2007),2))
Level: medium