Event: Summer League Division 3

Opponent Rating Result
Barry Williams 1629 1 - 0
Les P Day 1585 1 - 0
Alan S McIntosh 1763 0 - 1
John A Clark 1771 1 - 0
Luke W Russell 1416 ½ - ½
Andrew Nettleship 1562 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1821 = (9726 + 400 * (4 - 1)) / 6)

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