Event: Morpeth Summer Rapidplay

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Opponent Rating Result
Mick J Renshaw 1583 0 - 1
Mick J Renshaw 1583 1 - 0
Robert PC Mitcheson 1768 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1511 = (4934 + 400 * (1 - 2)) / 3)

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