Event: Division 1

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Opponent	Rating	Result
John Staniforth	1810	1 - 0
Edward Ng	1855	½ - ½
David Hulme	1840	0 - 1

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

1835 = (5505 + 400 * (1 - 1)) / 3)