Event: Internal Rapidplay January

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Opponent Rating Result
Richard Stevenson 1079 1 - 0
Sam Stevenson 1075 1 - 0
William Rowett 909 1 - 0
Harris Wilson 1131 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1449 = (4194 + 400 * (4 - 0)) / 4)

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