Event: U1640 Tournament

Opponent Rating Result
Oliver MacDonald 1792 1 - 0(def)
Neil Hambly 1456 1 - 0
David J Gibson 1541 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1899 = (2997 + 400 * (2 - 0)) / 2)

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