Event: Division 2

Opponent Rating Result
Pall A Thorarinsson 2211 ½ - ½
Dmitry Minko 2314 0 - 1
Hendrik Brackmann 2049 0 - 1
John H Hodgson 2022 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1949 = (8596 + 400 * (0 - 2)) / 4)

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