Event: Division Four

Opponent Rating Result
Mark E Tallis 1620 0 - 1
Peter S Banks 1538 1 - 0
David M Cotterell 1546 0 - 1
Matthew Allen 1585 ½ - ½
Louis Maciel 1445 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1547 = (7734 + 400 * (2 - 2)) / 5)

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