Event: Division 2

Opponent Rating Result
Colin J Davis 2092 0 - 1
Timothy M Jones 1726 1 - 0
Stephen M Williams 1798 0 - 1
GA Harvey 1864 ½ - ½
Stephen M Williams 1801 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1696 = (9281 + 400 * (1 - 3)) / 5)

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