Event: League

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Opponent Rating Result
Robert S Stokes 98 1 - 0
Robert S Stokes 98 1 - 0
Les Walker 79 1 - 0
Mike Robinson 102 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

394 = (377 + 400 * (3 - 0)) / 4)

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