Event: Division 3

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Opponent Rating Result
Iozeph Okosieme 1993 0 - 1
Zebedee Jones 1628 ½ - ½
Conrad Hall 1564 1 - 0
Robert D Hull 1693 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1720 = (6878 + 400 * (1 - 1)) / 4)

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