Event: Division B

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Opponent Rating Result
David Tuke 135 ½ - ½
Steve G Hughes 129 1 - 0
T Ben O'Rourke 125 1 - 0
Paul D Doherty 141 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

233 = (530 + 400 * (2 - 1)) / 4)

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