Event: Division 2

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Opponent Rating Result
Judith Heffer 1732 ½ - ½
Richard H Newman 0 ½ - ½
Danny Harrison 1638 1 - 0
Stuart J Jeffreys 1757 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1382 = (5127 + 400 * (1 - 0)) / 4)

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