Event: Division 1

Opponent Rating Result
Andrew A Clarkson 2033 0 - 1
John H Schofield 1857 ½ - ½
Stephen Ward 2083 0 - 0
Paul Smith 1702 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1731 = (5592 + 400 * (0 - 1)) / 3)

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