Event: Morpeth Summer Rapidplay

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Opponent Rating Result
Dennis Patterson 1408 1 - 0
Dennis Patterson 1408 0 - 1
David M Watson 1436 1 - 0
David M Watson 1425 0 - 1
James Charlton 1486 1 - 0
James Charlton 1486 0 - 1
Alan Welsh 1783 0 - 1
Alan Welsh 1783 0 - 1
Alan Welsh 1783 0 - 1
Alan Welsh 1783 0 - 1
David M Watson 1434 1 - 0
David M Watson 1434 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1454 = (18649 + 400 * (4 - 7)) / 12)

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