Event: R Division

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Opponent Rating Result
David Kilmartin 1295 0 - 1
William Rolfe 1400 0 - 1
William Rolfe 1400 0 - 1
David Kilmartin 1295 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1048 = (5390 + 400 * (0 - 3)) / 4)

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