Event: Hutchinson

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Opponent Rating Result
Nick Mullan 1555 1 - 0
Nigel Redmond 1625 0 - 1
Simon Jones 1464 1 - 0
Elinor Gorrell 1680 0 - 1
Dave Sykes 1529 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1571 = (7853 + 400 * (2 - 2)) / 5)

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