Event: Division 1

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Opponent	Rating	Result
Peter J Sullivan	2095	0 - 1
Joao AA Santos	1974	0 - 1
John Tennyson	2000	1 - 0

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

1890 = (6069 + 400 * (1 - 2)) / 3)