Event: Division 1

Opponent Rating Result
Michael B Carroll 1684 1 - 0
Peter J Kobryn 1960 0 - 1
Julian C Clissold 1774 1 - 0
Steve Hutchinson 1658 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1769 = (7076 + 400 * (2 - 2)) / 4)

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