Event: Division 3

Opponent Rating Result
Brian L Slater 1593 1 - 0
Mark BW Waterfield 1756 0 - 1
David J Walton 1615 ½ - ½
Julian Tarwid 1650 0 - 1
Michael A snr Garland 1510 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1625 = (8124 + 400 * (2 - 2)) / 5)

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