Event: Division Two

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Opponent Rating Result
M David Rutter 0 0 - 1
D Ian Calvert 180 1 - 0
Anthony R Kent 153 1 - 0
Kishan Lakhani 175 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

227 = (508 + 400 * (2 - 1)) / 4)

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