Event: Hutchinson

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Opponent Rating Result
Simon Jones 1460 1 - 0
Nick Mullan 1529 0 - 1
Mick Overend 1526 ½ - ½
Ellis Howard 1601 0 - 1
Derrick J Mason 1448 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1433 = (7564 + 400 * (1 - 2)) / 5)

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