Event: Watkinsons League

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Opponent Rating Result
Alec Ward 1776 0 - 1
Steve Westmoreland 148 ½ - ½
Karim Khan 1750 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1091 = (3674 + 400 * (0 - 1)) / 3)

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