Event: Division 4

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Opponent Rating Result
Grenville Wollerton 1737 ½ - ½
David Griffiths 1566 1 - 0
Keith W Roper 1754 ½ - ½
Daniel Pitts 1326 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1796 = (6383 + 400 * (2 - 0)) / 4)

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