Event: Division B

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Opponent Rating Result
David Harrison 1500 1 - 0
Vladimir Chtym 1470 1 - 0
Kyriacos Kyriacou 1578 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1783 = (4548 + 400 * (2 - 0)) / 3)

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