Event: Division 3

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Opponent Rating Result
Ian P Blencowe 1628 0 - 1
John H Sleggs 1507 0 - 1
Greta Bullman 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

645 = (3135 + 400 * (0 - 3)) / 3)

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