Event: Summer Swiss

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Opponent Rating Result
Patrick N Coleman 0 ½ - ½
John Regan 1481 0 - 1
RICHARD HYMAN 0 1 - 0
David E Aspinall 1733 0 - 1
John Cox 1476 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

778 = (4690 + 400 * (1 - 3)) / 5)

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