Event: Week 7

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Opponent	Rating	Result
Daniel Watt	1100	0 - 1
David E Shiers	1683	0 - 1
S Ali Arshad	1215	½ - ½

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

1066 = (3998 + 400 * (0 - 2)) / 3)