Event: Division 1

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Opponent Rating Result
Ihor Lewyk 2050 ½ - ½
Lee Crawford 1900 1 - 0
Vivien Webster 137 1 - 0
Phil Drury 1298 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1646 = (5385 + 400 * (3 - 0)) / 4)

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