O.K - I figured it out. assume 10 songs. The first song has 9 partners. Now the second song has 8 more partners because one is already there. The next song has seven more partners because two are already there and so on.

So I made a spreadsheet for 420 songs and proved that the 87,990 is correct......that's a lot of battles.

Colin

I try to critique as if you mean business.....

http://colinwardmusic.com/

http://rosewoodcreekband.com/