Event: Library Rapidplay May

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Opponent Rating Result
Joseph Hartill 1167 0 - 1
Albert Mellis 0 0 - 1
Tarryn Tinkler 969 0 - 1
Jack Butterworth 744 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

420 = (2880 + 400 * (0 - 3)) / 4)

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