Event: Division 2

Opponent Rating Result
Sanjoy K Banerjee 1733 0 - 1
David Eisen 1755 0 - 1
Mike J O'Mahony 1782 ½ - ½
Mike McGreal 1841 0 - 1
David CA Colbourne 1776 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1457 = (8887 + 400 * (0 - 4)) / 5)

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