Event: Hutchinson

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Opponent Rating Result
Dave Young 79 1 - 0
Derek Ludlam 0 0 - 1
Julian Toothill 91 1 - 0
Stephen Burton 106 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

69 = (276 + 400 * (2 - 2)) / 4)

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