Event: Division 1

Opponent Rating Result
Chris R Beaumont 2159 0 - 1
Peter E Chaplin 1996 ½ - ½
Martin J White 1906 ½ - ½
Stuart P Iles 1802 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1966 = (7863 + 400 * (1 - 1)) / 4)

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