Event: Division 4

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Opponent Rating Result
John A Oliver 1413 0 - 1
Michael H Cowley 1630 0 - 1
Benjamin Noyvert 1584 0 - 1
Barrie D Cooper 1608 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1259 = (6235 + 400 * (0 - 3)) / 4)

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