Event: Division 1

Opponent Rating Result
Paul McMahon 1840 0 - 1
Norman A Hutchinson 1970 1 - 0
Stuart Ross 1696 1 - 0
Laurie Pott 1826 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1933 = (7332 + 400 * (2 - 1)) / 4)

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