Event: Club Championship

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Opponent Rating Result
David E Aspinall 1719 0 - 1
Lee Williams 0 0 - 1
Peter A Wilson 1758 ½ - ½
John Regan 1510 0 - 1
Ben Fitzjohn 1347 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1107 = (6334 + 400 * (1 - 3)) / 5)

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