Event: AG Sunderland

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Opponent	Rating	Result
Henry Saunders	1574	0 - 1
Robert Pells	1707	0 - 1
Louis Needham	1405	½ - ½

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

1295 = (4686 + 400 * (0 - 2)) / 3)