Event: Division 4

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Opponent Rating Result
Kevin D Langmaid 1556 1 - 0
Alex Whelan 1565 0 - 1
Curtis Wilson 0 ½ - ½
Peter Ackland 1550 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1268 = (4671 + 400 * (2 - 1)) / 4)

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