Event: Hutchinson

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Opponent Rating Result
Simon Jones 98 ½ - ½
Nigel Redmond 123 ½ - ½
Steve Harrington 122 0 - 1
Julian Toothill 111 0 - 1
Andrew Walker 101
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-87 = (454 + 400 * (0 - 2)) / 4)

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