Since this is a program to display chess pairings, it shows W and B for White and Black. For other games or sports W can mean a home game, who starts, who calls the coin toss, the result of the coin toss, or ignored.
This shows each player's schedule.  To generate round robin pairings with board numbers, click here.  Choose "Porter" to replicate pairings on this page.  Click here to randomly assign pairing numbers.

 2008 by Warren Porter