Event: Whittlesford (Open)

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Opponent Rating Result
Ieuan C Ward 2290 0 - 1
Johnathan D Bourne 1990 0 - 1
Norman A Hutchinson 1953 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1678 = (6233 + 400 * (0 - 3)) / 3)

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