Event: Hutchinson

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Opponent Rating Result
Stephen Burton 111 ½ - ½
Nicholas Waite 95 ½ - ½
Robert Pells 131 ½ - ½
Derek Ludlam 114 1 - 0
Julian Toothill 111
performance = (sum(opponents ratings) + 400(wins-losses)) / games

213 = (451 + 400 * (1 - 0)) / 4)

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