Event: Division 4

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Opponent Rating Result
Barry DA Fraser 1453 1 - 0
Ian F Mills 1471 1 - 0
Laurie B Roberts 1566 ½ - ½
Malvina Rigoni 1379 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1767 = (5869 + 400 * (3 - 0)) / 4)

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