Event: Hutchinson

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Opponent Rating Result
Derek Ludlam 110 ½ - ½
Julian Toothill 116 1 - 0
Nigel Redmond 121 ½ - ½
Simon Jones 95 1 - 0
Steve Harrington 122
performance = (sum(opponents ratings) + 400(wins-losses)) / games

311 = (442 + 400 * (2 - 0)) / 4)

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