Event: GP3 - November

Opponent Rating Result
John James 1104 1 - 0
Howard L Tebbs 1997 0 - 1
Sharon Merchant 1372 1 - 0
Janis Petersons 1808 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1570 = (6281 + 400 * (2 - 2)) / 4)

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