Event: GP3 - November

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Opponent	Rating	Result
William F Tracey	1606	0 - 1
Sharon Merchant	1372	0 - 1
Mick Sullivan	657	1 - 0

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

1078 = (3635 + 400 * (1 - 2)) / 3)