Event: NCCA League Division 4

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Opponent	Rating	Result
David L Jones	1545	1 - 0
Anne Louise Bishop	1442	0 - 1
David L Jones	1520	0 - 1

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

1369 = (4507 + 400 * (1 - 2)) / 3)