Event: Division 2

Opponent Rating Result
Richard Black 2089 0 - 1
Stephen CD Carpenter 1749 0 - 1
Iozeph Okosieme 1879 ½ - ½
Kahngjoon Koh 0 1 - 0
Keith S Jones 1747 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1493 = (7464 + 400 * (2 - 2)) / 5)

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