Event: Division One

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Opponent Rating Result
Steve F Tarr 1797 ½ - ½
Robert Grimes 1765 0 - 1
Jack O Moss 1473 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1412 = (5035 + 400 * (0 - 2)) / 3)

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