Event: Division 2

Opponent Rating Result
Paul Fisher 1586 0 - 1
Matthew Pannett 1776 0 - 1
William F Tracey 1532 ½ - ½
Andrew G Gibson 1743 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1559 = (6637 + 400 * (1 - 2)) / 4)

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