Event: Hillingdon Div 3

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Opponent	Rating	Result
Shion Fernandes	1470	½ - ½
James Lyons	1695	1 - 0
James Linton	1425	½ - ½

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

1663 = (4590 + 400 * (1 - 0)) / 3)