Event: Division 1

Opponent Rating Result
Alexandru Moldovan 1828 0 - 1
Michael Ashworth 2090 1 - 0
John Lightowler 1689 ½ - ½
Graeme Hood 1805 0 - 1
Harry Davison 1823 0 - 1
Stephen Tatlow 1548 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1597 = (10783 + 400 * (1 - 4)) / 6)

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