Event: Division 2

Opponent Rating Result
Ian P Blencowe 1614 0 - 1
John-Paul McDonald 1613 0 - 1
Peter Nelson 0 0 - 1
John-Paul McDonald 1503 0 - 1
Jim A Caterer 1480 1 - 0
Frank Jewell 1494 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1017 = (7704 + 400 * (1 - 5)) / 6)

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