Event: Morpeth Summer Rapidplay

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Opponent Rating Result
David M Watson 1425 ½ - ½
David M Watson 1425 1 - 0
Dennis Patterson 1551 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1467 = (4401 + 400 * (1 - 1)) / 3)

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