This grid is your traditional grid where the score at the end of each quarter is the score that you go by. ie. If the score at the end of the 1st quarter is AFC 7 NFC 7, then the square that intersects the 2 rows with 7 would be the winner. See example below.

	2	3	4	1	0	9	8	7	6	5
9
1
3
5
7								X
2
4
6
8
0

This grid is the non-traditional grid where each quarter, each half and the final score are scored individually. ie Using the example above, say the second quarter AFC scored 7 NFC scored 3, that would put the winner of the second quarter as the square that intersects 7 and 3 and the winner of the 1st half would be 4 and 0 because the score is 14-10. See example below.

	2	3	4	1	0	9	8	7	6	5
9
1
3
5
7		X						X
2
4					X
6
8
0