Event: Summer Rapidplay

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Opponent Rating Result
Sanjay Saggar 0 1 - 0
Richard Stevenson 1201 1 - 0
Rhys Orton 1229 0 - 1
Michael J Creaney 1652 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1021 = (4082 + 400 * (2 - 2)) / 4)

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