Event: Division 2

Opponent Rating Result
Michael Hardman 1982 0 - 1
Steve J Dyer 1686 ½ - ½
Richard Maclannan 1811 0 - 1
Paul Broadley 1675 1 - 0
Ian Gambles 1625 0 - 1
Matthew Hammond 1810 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1565 = (10589 + 400 * (1 - 4)) / 6)

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