Table:
0
A
B
C
D
E
F
1
Episode
Airdate
Iron Chef
Challenger
Theme Ingredient
Winner
2
1
19 October 2010
Neil Perry
Matt Stone
Coconut
Neil Perry
3
2
26 October 2010
Guy Grossi
Judyta Slupnicki
Duck
Guy Grossi
4
3
2 November 2010
Guillaume Brahimi
Chris Badenoch
Chocolate
Guillaume Brahimi
5
4
9 November 2010
Guy Grossi
Herb Faust
Lamb
Herb Faust
6
5
16 November 2010
Neil Perry
Sasha Meier
Squid
Neil Perry

Questions and formulas:
Question: Who was the challenger when guillaume brahimi was the iron chef?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="Guillaume Brahimi"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,C2:C6="Guillaume Brahimi"),4))
Level: medium
Question: Who was the iron chef when herb Faust was the challenger?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="Herb Faust"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,D2:D6="Herb Faust"),3))
Level: medium
Question: What date did the episode air when guy grossi won?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="Guy Grossi"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,F2:F6="Guy Grossi"),2))
Level: medium