Event: David Hodgson Trophy

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Opponent	Rating	Result
Luke Hartley	1875	½ - ½
Robin W Haldane	2058	0 - 1
James Fox	1870	1 - 0
Robin W Haldane	2058	0 - 1
James Fox	1870	0 - 1

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

1786 = (9731 + 400 * (1 - 3)) / 5)