Event: Division 3

Opponent Rating Result
Sam Bradley 1150 1 - 0
Brian Jones 1141 ½ - ½
Marc Carter 1150 ½ - ½
David J Stuart 1150 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1148 = (4591 + 400 * (1 - 1)) / 4)

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