Event: MCA Division 2

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Opponent Rating Result
Chris Wentworth 1623 0 - 1
Gerard Varney 1555 1 - 0
Alistair Bond 1698 1 - 0
Barbara Novak 1683 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1640 = (6559 + 400 * (2 - 2)) / 4)

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