Event: Division 3

Opponent Rating Result
Gareth Day 1769 ½ - ½
John Holden 1457 1 - 0
David Steyn 1651 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1759 = (4877 + 400 * (1 - 0)) / 3)

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