Event: Hutchinson

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Opponent Rating Result
Nigel Redmond 123 ½ - ½
Derek Ludlam 110 ½ - ½
Julian Toothill 111 1 - 0
Steve Harrington 122 0 - 1
Simon Jones 95
performance = (sum(opponents ratings) + 400(wins-losses)) / games

117 = (466 + 400 * (1 - 1)) / 4)

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