Event: Division 1

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Opponent Rating Result
Laurie Pott 1825 0 - 1
John WF McAllister 1649 0 - 1
Peter J Collicott 1500 0 - 1
Rowland Kerr 1853 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1307 = (6827 + 400 * (0 - 4)) / 4)

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