Event: Division A

Opponent Rating Result
Jeff A Goldberg 2136 0 - 1
Jochen Wittmann 1951 0 - 1
John Cawdery 2072 ½ - ½
Piro Balloglu 2041 1 - 0
Jeff A Goldberg 2144 0 - 1
David Spearman 2067 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1869 = (12411 + 400 * (1 - 4)) / 6)

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