Event: Grand Prix 1

Opponent Rating Result
James Lumsden 1709 1 - 0
Michael Hayward 1684 1 - 0
Janis Petersons 1767 0 - 1
Sharon Merchant 1492 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1863 = (6652 + 400 * (3 - 1)) / 4)

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