Table:
0
A
B
C
D
E
1
Date
Tournament
Surface
Opponent in the final
Score
2
2 May 2005
Seogwipo
Hard
James Auckland
7–5, 6–3
3
30 May 2005
Wuhan
Hard
Ishay Hadash
7–6, 6–3
4
19 September 2005
Rockhampton
Hard
Luke Bourgeois
7–6, 2–6, 6–4
5
10 October 2005
Queensland
Hard
Mark Nielsen
7–5, 6–3
6
12 February 2007
Wollongong
Hard
Grega Žemlja
7–5, 6–1
7
7 May 2007
Kuwait
Hard
Mohammed Ghareeb
6–3, 6–2
8
4 June 2007
Puerto Cruz
Carpet
Guillermo Alcaide
6–4, 6–4
9
6 August 2007
Wrexham
Hard
Adam Feeney
6–4, 4–6, 6–4
10
17 September 2007
Lubbock
Hard
Dušan Vemić
6–3, 7–6 (9–7)
11
30 June 2008
Dublin
Hard
Frederik Nielsen
7–6 (7–5) , 6–2
12
22 March 2009
Poitiers
Hard
Dominik Meffert
6–4, 3–6, 6–3

Questions and formulas:
Question: What surface did Smeets play on during the Kuwait tournament?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="kuwait"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,B2:B12="kuwait"),3))
Level: medium
Question: What tournament did Smeets play against Mark nielsen?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="mark nielsen"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,D2:D12="mark nielsen"),2))
Level: medium
Question: Who was the opponent during the tournament in Kuwait?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="kuwait"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,B2:B12="kuwait"),4))
Level: medium