Event: Open

Opponent Rating Result
Andrew J Morley 2116 0 - 1
Roland E Graf 1856 0 - 1
Robert Mitchell 1775 ½ - ½
Philip J Horspool 2023 0 - 1
Julian Tarwid 1650 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1564 = (9420 + 400 * (0 - 4)) / 5)

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