Event: Summer Swiss

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Opponent Rating Result
John Cox 1476 1 - 0
Darren Pickering 1576 0 - 1
John G Cooper 1953 0 - 1
RICHARD HYMAN 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1251 = (5005 + 400 * (2 - 2)) / 4)

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