Event: Summer League Division 2

Opponent Rating Result
Alan S McIntosh 1802 ½ - ½
Chris G Willey 1768 ½ - ½
Paul Davies 1585 0 - 1
Tom Hails 1685 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1710 = (6840 + 400 * (1 - 1)) / 4)

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