Event: B Division

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Opponent	Rating	Result
Chris Swales	1567	½ - ½
Brian Whitaker	1586	½ - ½
Dave Frank	1563	0 - 1
Kegan Harrison	1653	½ - ½
Ray Pallister	1563	½ - ½
Joe McGinnis	1527	0 - 1
P Ged Murphy	1519	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1397 = (10978 + 400 * (0 - 3)) / 7)