Event: League Division 3

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Opponent Rating Result
Mark A Herbert 1186 0 - 1
Michael Carrigan 1139 1 - 0
Neil Harris 871 ½ - ½
Pete Sheppard 1240 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1209 = (4436 + 400 * (2 - 1)) / 4)

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