Event: Div 4 - Athenaeum Cup

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Opponent Rating Result
Richard Lunt 1474 1 - 0
John N Stevens 1572 0 - 1
Ron Keenan 1591 0 - 1
Steve Daykin 1344 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1495 = (5981 + 400 * (2 - 2)) / 4)

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