Event: Division 1

Opponent Rating Result
David J Horton 1924 0 - 1
Stephen Tatlow 1696 ½ - ½
Nigel Sharp 1693 1 - 0
Graham K Brown 1676 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1747 = (6989 + 400 * (1 - 1)) / 4)

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