Event: Division 2

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Opponent Rating Result
David Gardiner 1893 0 - 1
Alan Eley 1498 0 - 1
Paul Silverman 1571 0 - 1
Fred S Dickson 1607 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1242 = (6569 + 400 * (0 - 4)) / 4)

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