Event: WDCL Division 3

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Opponent	Rating	Result
David Cottrell	1325	0 - 1
Daniel Robinson	1449	0 - 1
Samuel Augustis	1117	1 - 0

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

1164 = (3891 + 400 * (1 - 2)) / 3)