Event: Division 4

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Opponent Rating Result
David Bean 1728 ½ - ½
Edward Hargreaves 1576 ½ - ½
Russell Hope 1438 1 - 0
Timothy J Chapman 1702 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1611 = (6444 + 400 * (1 - 1)) / 4)

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