Table:
0
A
B
C
D
E
F
G
1
Week
Date
Opponent
Result
Game site
Record
Attendance
2
1
September 6
Oakland Raiders
W 9–7
Mile High Stadium
1–0
74,796
3
2
September 13
at Seattle Seahawks
L 10–13
Kingdome
1–1
58,513
4
3
September 20
Baltimore Colts
W 28–10
Mile High Stadium
2–1
74,804
5
4
September 27
San Diego Chargers
W 42–24
Mile High Stadium
3–1
74,822
6
5
October 4
at Oakland Raiders
W 17–0
Oakland-Alameda County Coliseum
4–1
51,035
7
6
October 11
Detroit Lions
W 27–21
Mile High Stadium
5–1
74,816
8
7
October 18
at Kansas City Chiefs
L 14–28
Arrowhead Stadium
5–2
74,672
9
8
October 25
at Buffalo Bills
L 7–9
Rich Stadium
5–3
77,757
10
9
November 2
Minnesota Vikings
W 19–17
Mile High Stadium
6–3
74,834
11
10
November 8
Cleveland Browns
W 23–20 (OT)
Mile High Stadium
7–3
74,859
12
11
November 15
at Tampa Bay Buccaneers
W 24–7
Tampa Stadium
8–3
64,518
13
12
November 22
at Cincinnati Bengals
L 21–38
Riverfront Stadium
8–4
57,207
14
13
November 29
at San Diego Chargers
L 17–34
Jack Murphy Stadium
8–5
51,533
15
14
December 6
Kansas City Chiefs
W 16–13
Mile High Stadium
9–5
74,744
16
15
December 13
Seattle Seahawks
W 23–13
Mile High Stadium
10–5
74,527
17
16
December 20
at Chicago Bears
L 24–35
Soldier Field
10–6
40,125

Questions and formulas:
Question: What was the result on September 20?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,B1="september 20"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G17,B2:B17="september 20"),4))
Level: medium