Event: Division Four

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Opponent Rating Result
Lukasz Marcin Walijewski 141 ½ - ½
Stephen M Fryer 125 1 - 0
John Green 119 0 - 1
Ian M Truscott 130 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

229 = (515 + 400 * (2 - 1)) / 4)

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