Round Robin Pairings
Porter By board number. Normal Colors Rewrite screen
Crenshaw Sequential Players. Reversed Colors New screen   Crenshaw & Sequential are USCF defaults.
Min. Moves 2nd half of Round Robin or splice in late players
Enter number of players:
(Internal) Board Number Players are initially seated in every other chair and rotate by at most one position.

Sequential players As above except except only odd boards are displayed from left to right starting from the "ghost" board, then even boards from right to left. Because sequential players were seated in every other chair, they will appear to be seated next to the next sequential higher or lower pairing numbered players. This is how the tables appear in Official Rules (US. Chess Federation).

Min. Moves Same as sequential except that alternate rounds are displayed in reverse order and only half the players move each round.
Example for 12 players in board order in Rd. 1:
 1:    1-12   7-6   11-2   8-5   10-3   9-4

12 players on Sequential Players in Rd. 1 (Same for Min. Moves, but reverses on even numbered rounds):
1:     1-12 11-2   10-3   9-4    8-5    7-6
Porter is a simple modification to the original Berger tables which started with Player 1 starting with two whites while another player started with two blacks.  E.g., with 12 players, 1-6 had white against 12-7 respectively and 7 starts with two blacks.  The modification is 1 has white against 12, but 2-6 have black against 11-7. Click here for an example. Crenshaw corrected the same problem, but opponents are in descending order.

To generate random pairing numbers, click here. To display each players' schedule in Porter order, click here.  2008 by Warren Porter


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