Table:
0
A
B
C
D
E
F
1
Year
Competition
Date
Location
Score
Result
2
1989
Europe/Africa Zone Group II, Quarterfinal
5–7 May
Warsaw
2-3
Loss
3
1988
Europe/Africa Zone Group II, Semifinal
10 - 12 Jun
Athens
1:3
Loss
4
1988
Europe/Africa Zone Group II, Quarterfinal
6–8 May
Warsaw
5:0
Win
5
1987
Quarterfinal
12 - 14 Jun
Brasov
1:4
Loss
6
1987
1st Round
8–10 May
Harare
3:2
Win
7
1986
Quarterfinal
13 - 15 Jun
Warsaw
1:4
Loss
8
1986
1st Round
23–25 May
Warsaw
3:2
Win
9
1985
1st Round
10–12 May
Warsaw
2:3
Loss
10
1984
Quarterfinal
15 - 17 Jun
Jerusalem
0:5
Loss
11
1984
1st Round
4–6 May
Warsaw
4:1
Win
12
1983
1st Round
6–8 May
Warsaw
0:5
Loss
13
1982
1st Round
7–9 May
Casablanca
2:3
Loss
14
1981
Quarterfinal
12 - 14 Jun
Monte Carlo
2:3
Loss
15
1980
Preliminary Round
8 - 10 Feb
Helsinki
0:5
Loss

Questions and formulas:
Question: How many years has there been a competition in Helsinki?
Formula: ROWS(UNIQUE(FILTER(A1, D1="helsinki")))
Formula2: ROWS(UNIQUE(FILTER(A2:A15, D2:D15="helsinki")))
Level: medium
Question: Which competition before 1982 had a score of 2:3?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(A1<1982)*(E1="2:3")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(A2:A15<1982)*(E2:E15="2:3")),2))
Level: medium
Question: Which competition occurred after 1980 with a score of 0:5 in Jerusalem?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(A1>1980)*(E1="0:5")*(D1="jerusalem")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(A2:A15>1980)*(E2:E15="0:5")*(D2:D15="jerusalem")),2))
Level: medium