Event: Meltham Club Tournament

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Opponent Rating Result
David Robinson 0 ½ - ½
Robert Oldfield 0 ½ - ½
David Firth 1527 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

642 = (1527 + 400 * (1 - 0)) / 3)

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