Event: Division 3

Opponent Rating Result
James AB Stevenson 2109 ½ - ½
Gary Cook 1956 1 - 0
Dmitry Kolobkov 1822 0 - 1
Peter R Wood 1911 ½ - ½
Wingki Kwong 2192 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1918 = (9990 + 400 * (1 - 2)) / 5)

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