Event: Division Three

Opponent Rating Result
Peter I Thompson 1981 ½ - ½
David Thomson 1833 ½ - ½
Mark A Talbot 1981 0 - 1
Robert Marks 1776 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1893 = (7571 + 400 * (1 - 1)) / 4)

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