I am trying to calculate how many games a player named "Arenas" has played
based on data in two worksheets, "Source" and "Chart1." In Source, the
entries in col A are as follows:

COL A
Arenas
Butler
Haywood
Thomas
Stevenson
Brown
Smith

In Chart1 the entries in cols A and E are as follows.

COL A COL E
4/23/08 Arenas
4/24/08 Butler
4/24/08 Arenas
4/23/08 Haywood
4/23/08 Arenas
4/26/08 Thomas
4/26/08 Thomas
4/26/08 Arenas
4/26/08 Arenas

Each unique player and date combination counts as 1 game played. In this
example, it is evident from the data in Chart1 that Arenas has played in 3
games (4/23, 4/24, 4/26) even though his name is listed 5 times, two of which
are for games on the same dates (4/23 and 4/26).

From the Source sheet, I want a formula that will calculate this example,
keeping in mind that the rows of data are actually 1 to 20000

Can anyone help?

Thanks,
Bob