Event: Week 2

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Opponent	Rating	Result
David A Hallen	1481	1 - 0
Dean Corbishley	1402	0 - 1
Chris Simpson	1671	0 - 1

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

1385 = (4554 + 400 * (1 - 2)) / 3)