Table:
0
A
B
C
D
E
F
1
Date
Opponent
Score
Result
Record
Attendance
2
September 8
Boston Patriots
16-7
Loss
0–1
38,865
3
September 15
Oakland Raiders
48–6
Loss
0–2
43,056
4
September 22
at Cincinnati Bengals
34-23
Loss
0–3
24,405
5
September 29
New York Jets
37-35
Win
1–3
38,044
6
October 5
Kansas City Chiefs
18-7
Loss
1–4
40,748
7
October 12
at Miami Dolphins
14-14
Tie
1-4-1
28,559
8
October 20
at Boston Patriots
23-6
Loss
1-5-1
21,082
9
October 27
Houston Oilers
30-7
Loss
1-6-1
34,339
10
November 3
at New York Jets
25-21
Loss
1-7-1
61,452
11
November 10
Miami Dolphins
21-17
Loss
1–8-1
28,751
12
November 17
San Diego Chargers
21-6
Loss
1-9-1
27,993
13
November 24
at Denver Broncos
34-32
Loss
1-10-1
35,142
14
November 28
at Oakland Raiders
13-10
Loss
1-11-1
39,883
15
December 7
at Houston Oilers
35-6
Loss
1-12-1
34,110

Questions and formulas:
Question: What is the Opponent of the Game on October 20?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="october 20"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,A2:A15="october 20"),2))
Level: medium