Event: Hutchinson

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Opponent Rating Result
Steve Harrington 114 ½ - ½
Julian Toothill 0 1 - 0
Derek Ludlam 106 0 - 1
Mark McGinty 109 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

182 = (329 + 400 * (2 - 1)) / 4)

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