Event: Division 4

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Opponent Rating Result
Charles Higenbottam 1315 1 - 0
Jon White 1676 ½ - ½
John G Paton 1531 1 - 0
Rob Allen 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1431 = (4522 + 400 * (3 - 0)) / 4)

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